01exp-扩展-001_宇宙创生exp-ext-001_Cosmogenesisv19
这篇讲的是宇宙创生,也就是宇宙最初从无到有的那个起点。它要处理的是宇宙怎么开始、最早那一小段是什么样子,而不是它后来怎么一步步演化。作者把这个起点问题摆出来,也说明它难在哪里、可以从哪些方向去想。This one is about cosmic genesis — the starting point at which the universe came into being from nothing. It deals with how the universe began and what its earliest stage looked like, rather than how it evolved afterwards. The author lays the problem out and says where its difficulties lie.
zenodo.23329991
02exp-扩展-002_宇宙学_宇宙学常数问题exp-ext-002_Cosmology_The cosmological constant problemv27
这篇要处理的是宇宙学常数问题。宇宙学常数是爱因斯坦方程里代表真空能量、让宇宙加速膨胀的那一项;麻烦在于,按量子场论估出来的真空能量,比天文观测到的值大了许多个数量级。作者把估算和观测这两头的差距摆在一起谈。This one tackles the cosmological constant problem. The cosmological constant is the term in Einstein's equations that stands for vacuum energy and drives accelerated expansion; the trouble is that quantum-field-theory estimates of it overshoot the observed value by many orders of magnitude. The author sets the two sides of that gap side by side.
zenodo.23329994
03exp-扩展-003_光子-强子耦合常数exp-ext-003_Photon-hadron coupling constantv31
这篇讲的是光子与强子的耦合常数,也就是光子和参与强相互作用的粒子之间结合得到底有多强。耦合常数可以理解成一个强度系数,数值大就说明两者之间的作用更明显。作者围绕这个系数怎么定、怎么用展开讨论。This one concerns the photon–hadron coupling constant, meaning how strongly photons couple to particles that take part in the strong interaction. A coupling constant works as a strength factor: a larger number means a more pronounced interaction. The author discusses how this quantity is fixed and how it is used.
zenodo.23329997
04exp-扩展-004_光子带隙材料exp-ext-004_Photonic bandgap materialsv36
这篇讲的是光子带隙材料。这类材料内部有周期性的结构,某些颜色也就是某些频率的光进去之后会被挡住、传不过去,作用有点像半导体挡住特定能量的电子。作者围绕这种挡光的结构本身来谈,包括它是怎么起作用的。This one is about photonic bandgap materials. Such materials have a periodic internal structure that blocks certain colours, that is, certain frequencies of light, much as a semiconductor blocks electrons of particular energies. The author discusses this light-blocking structure itself and how it works.
zenodo.23329999
05exp-扩展-005_SPDC截面exp-ext-005_SPDC cross-sectionv22
这篇讲的是自发参量下转换(SPDC)的截面。SPDC 是指一束光在非线性晶体里自发裂成两个光子的过程,而截面就是这件事发生概率大小的量度。作者围绕这个概率怎么算、和哪些条件有关来谈。This one is about the cross-section of spontaneous parametric down-conversion (SPDC). SPDC is the process in which one light beam spontaneously splits into two photons inside a nonlinear crystal, and the cross-section measures how likely that process is. The author discusses how that likelihood is computed and what it depends on.
zenodo.23330005
06exp-扩展-006_超表面相位exp-ext-006_Metasurface phasev34
这篇讲的是超表面的相位调控。超表面是一层人工做出来的、厚度远小于波长的结构,上面排着许多微小单元;光穿过或者被反射时,相位会被这些单元改动。作者要处理的是怎么在这么薄的一层上把光波的相位控制住。This one is about phase control with metasurfaces. A metasurface is an artificially made layer far thinner than a wavelength, covered with tiny elements; as light passes through or reflects off it, those elements shift its phase. The author deals with how the phase of a light wave can be controlled on such a thin layer.
zenodo.23330011
07exp-扩展-007_量子测量反作用exp-ext-007_Quantum measurement backactionv19
这篇讲的是量子测量反作用,意思是测量这个动作本身会扰动被测的量子系统。在量子力学里,测量不是被动地看一眼,它会把原来的叠加状态改掉,于是测出来的结果也带着这份扰动。作者围绕这种扰动的来由和影响来谈。This one is about quantum measurement back-action: the act of measuring disturbs the quantum system being measured. In quantum mechanics measurement is not a passive look — it alters the superposition that was there, so the recorded result carries that disturbance. The author discusses where the disturbance comes from and what it affects.
zenodo.23330015
08exp-扩展-008_非线性截面exp-ext-008_Nonlinear cross-sectionsv38
这篇讲的是非线性截面。通常介质的响应和光强成正比,但在强光下这种正比关系不再成立,非线性效应登场的强弱就用截面来衡量。作者围绕介质在强光下偏离线性响应的这一段来谈。This one is about nonlinear cross-sections. A medium's response normally stays in proportion to light intensity, but under intense light that proportionality breaks down, and a cross-section measures how strong the nonlinear effect becomes. The author discusses this departure from linear response under strong light.
zenodo.23330017
09exp-扩展-009_EUV 光刻仿真新范式exp-ext-009_A new paradigm for EUV lithography simulationv20
这篇讲的是极紫外(EUV)光刻仿真的新路子。EUV 光刻用波长很短的极紫外光在芯片上刻出极细的线条,而仿真就是先用数值计算预演一遍光刻过程会得到什么图案。作者要处理的是换一种方式来做这套模拟。This one is about a new way of simulating extreme-ultraviolet (EUV) lithography. EUV lithography uses very short-wavelength light to print extremely fine features on chips, and simulation means computing beforehand what pattern the process will produce. The author deals with doing that simulation in a different way.
zenodo.23330021
10exp-扩展-010_铜氧化物高温超导_中长论文exp-ext-010_Cuprate high-Tc superconductivity_Medium-length paperv36
这篇讲的是铜氧化物高温超导。铜氧化物是一类含铜和氧的层状材料,它们的超导转变温度比传统金属高出很多,所以被称为高温超导;在这种材料里,超导是怎么出现的仍然没有定论。作者就这类材料写了一篇中等篇幅的讨论。This one is about high-temperature superconductivity in the copper oxides. Cuprates are layered materials containing copper and oxygen whose superconducting transition temperatures are far higher than those of ordinary metals, which is why they are called high-temperature superconductors; how superconductivity arises in them is still unsettled. The author gives them a medium-length discussion.
zenodo.23330025
11exp-扩展-011_拓扑超导Majoranaexp-ext-011_Topological superconductivity and Majoranav30
这篇讲的是拓扑超导体里的 Majorana 准粒子。拓扑超导是一种整体性质由拓扑结构决定的超导态;Majorana 准粒子则是它里面可能出现的一种激发,特点是它自己就是自己的反粒子。作者围绕这种准粒子来谈。This one is about Majorana quasiparticles in topological superconductors. A topological superconductor has properties fixed by its overall topology, and a Majorana quasiparticle is an excitation it may host that is its own antiparticle. The author focuses on this kind of quasiparticle.
zenodo.23330028
12exp-扩展-012_Tc 上限exp-ext-012_Upper bound on Tcv30
这篇要处理的是超导转变温度(Tc)的理论上限,也就是超导能撑到多热才失效的那个天花板。Tc 说的是材料从有电阻变成零电阻的那个温度。作者要问的是,有没有一个上限把 Tc 卡住,这个上限又是从哪里来的。This one deals with the theoretical upper limit on the superconducting transition temperature (Tc), the ceiling on how warm superconductivity can survive. Tc is the temperature at which a material's resistance drops to zero. The author asks whether some limit caps Tc and where such a limit would come from.
zenodo.23330030
13exp-扩展-013_重费米子奇异金属exp-ext-013_Heavy-fermion strange metalsv35
这篇讲的是重费米子体系里的奇异金属。重费米子材料里的电子表现得特别重,像是被什么东西拖住了;奇异金属则是指电阻随温度的变化不按普通金属那套规律走。作者把这两件事放在一起谈。This one is about strange metals in heavy-fermion systems. In heavy-fermion materials the electrons behave as if they were unusually heavy, as though dragged down; a strange metal is one whose resistance varies with temperature in a way ordinary metals do not follow. The author treats the two together.
zenodo.23330032
14exp-扩展-014_光致超导exp-ext-014_Photoinduced superconductivityv34
这篇讲的是光致超导,也就是用一束光去照材料,看能不能把它送进超导态,或者让已有的超导变得更强。超导态的标志是电阻完全消失。作者围绕光照这个手段,以及它可能带来的超导变化来谈。This one is about photo-induced superconductivity: shining light on a material to see whether it can be driven into a superconducting state, or have an existing one strengthened. Superconductivity is marked by resistance vanishing entirely. The author discusses light as the tool and the changes in superconductivity it might bring.
zenodo.23330034
15exp-扩展-015_哈勃常数危机exp-ext-015_The Hubble constant tensionv43
这篇讲的是哈勃常数危机。哈勃常数描述宇宙现在膨胀得有多快;麻烦在于,用邻近宇宙的办法量出来的值,和从早期宇宙留下的痕迹推出来的值,两者对不上。作者围绕这个彼此打架的局面来谈。This one is about the Hubble constant crisis. The Hubble constant describes how fast the universe is expanding now; the trouble is that values measured from the nearby universe and values inferred from imprints of the early universe do not agree. The author discusses this standoff between the two.
zenodo.23330036
16exp-扩展-016_暗能量 w(z)exp-ext-016_Dark energy w(z)v37
这篇讲的是暗能量的状态方程 w(z)。w 表示暗能量的压强和能量密度之比,括号里的 z 是红移,代表宇宙的不同时期,所以 w(z) 看的就是这个比值随宇宙演化怎么变。作者围绕它随时间的变化来谈。This one is about the dark-energy equation of state, w(z). Here w is the ratio of dark energy's pressure to its energy density, and z is redshift, standing for different cosmic epochs, so w(z) asks how that ratio changes as the universe evolves. The author discusses that time dependence.
zenodo.23330038
17exp-扩展-017_原初引力波exp-ext-017_Primordial gravitational wavesv26
这篇讲的是原初引力波。引力波是时空的涟漪,而「原初」两个字指的是它产生于宇宙极早期,不是后来天体并合这类过程留下的。作者围绕这种极早期的涟漪来谈,以及它可能告诉我们什么。This one is about primordial gravitational waves. Gravitational waves are ripples in spacetime, and "primordial" means they arose in the very early universe rather than from later events such as merging bodies. The author discusses these early ripples and what they might tell us.
zenodo.23330040
18exp-扩展-018_S8张力exp-ext-018_The S8 tensionv28
这篇讲的是 S8 张力。S8 是一个衡量物质在宇宙中成团程度的参数,数值越大说明物质聚得越厉害;这里的张力指的是,不同观测手段给出的 S8 值彼此对不上。作者围绕这个不一致来谈。This one is about the S8 tension. S8 is a parameter measuring how clumpy matter is in the universe — a larger value means matter clusters more strongly; tension here means different kinds of observation give S8 values that disagree with one another. The author discusses that disagreement.
zenodo.23330042
19exp-扩展-019_21cm 信号exp-ext-019_The 21 cm signalv34
这篇讲的是 21 厘米信号。这是中性氢原子在两个能级之间翻转时发出的射电谱线,波长大约 21 厘米;宇宙里有大量中性氢,所以这条线带着早期宇宙的信息。作者围绕这条信号来谈。This one is about the 21 cm signal. It is the radio line emitted when a neutral hydrogen atom flips between two energy levels, at a wavelength near 21 centimetres; the universe holds a great deal of neutral hydrogen, so this line carries information about the early universe. The author discusses this signal.
zenodo.23330044
20exp-扩展-020_暗物质_三通道合篇exp-ext-020_Dark matter_Three channels in one paperv44
这篇讲的是暗物质探测的三条路子合在一起看。所谓三通道,通常指直接探测、间接探测和对撞机产生这三类办法,它们各自从不同角度去找暗物质。作者把它们放进同一篇里对照着谈。This one looks at the three detection channels for dark matter together. The three channels usually mean direct detection, indirect detection and production at colliders, each hunting dark matter from a different angle. The author treats them in one piece and compares them.
zenodo.23330047
21exp-扩展-021_量子自旋液体存在性与分类exp-ext-021_Existence and classification of quantum spin liquidsv28
这篇讲的是量子自旋液体。这是一种磁矩被量子涨落搅得安定不下来的状态,即使在很低的温度下也不会形成通常的磁序。作者要处理两件事:这种状态到底存不存在,以及如果存在,该怎么给它分类。This one is about quantum spin liquids. In such a state quantum fluctuations keep the magnetic moments from settling, so the usual magnetic order never forms even at very low temperature. The author deals with two questions: whether such states exist at all, and how to classify them if they do.
zenodo.23330049
22exp-扩展-022_磁单极子exp-ext-022_Magnetic monopolesv29
这篇讲的是磁单极子。普通的磁铁总是南北两极成对出现,把它切开也只会得到两个更小的磁铁;磁单极子则是设想中只带单独一个磁极的粒子。作者围绕这种粒子,以及寻找它的努力来谈。This one is about magnetic monopoles. An ordinary magnet always carries north and south poles as a pair, and cutting it only yields two smaller magnets; a magnetic monopole is a hypothetical particle with just one pole. The author discusses this particle and the search for it.
zenodo.23330054
23exp-扩展-023_拓扑磁振子与磁斯格明子exp-ext-023_Topological magnons and magnetic skyrmionsv36
这篇讲的是拓扑磁振子和磁斯格明子。磁振子是磁矩集体摆动形成的波,斯格明子则是磁矩排成的一种像小漩涡的结构;两者都受拓扑保护,不容易被扰动弄散。作者围绕磁体里这两种特殊激发来谈。This one is about topological magnons and magnetic skyrmions. A magnon is a wave formed by the collective precession of magnetic moments, while a skyrmion is a swirling arrangement of those moments; both are topologically protected and hard to disrupt. The author discusses these two excitations in magnets.
zenodo.23330056
24exp-扩展-024_超导-磁性竞合相图exp-ext-024_Superconductivity-magnetism competition phase diagramv34
这篇讲的是超导和磁性之间的竞争与合作。在同一块材料里,超导希望电子两两配对,磁性则倾向于让磁矩排整齐,两者常常互相压制,但有时也能共存。作者围绕这种此消彼长画出的相图来谈。This one is about competition and cooperation between superconductivity and magnetism. In one material, superconductivity wants electrons paired up while magnetism tends to align the moments; the two often suppress each other yet can sometimes coexist. The author discusses the phase diagram this tug-of-war produces.
zenodo.23330059
25exp-扩展-025_重费米子磁量子相变exp-ext-025_Heavy-fermion magnetic quantum phase transitionsv25
这篇讲的是重费米子材料里的磁量子相变。相变是物质从一种状态变成另一种状态;量子相变则是指在绝对零度附近,由量子涨落而不是热量驱动的转变。作者围绕重费米子体系里这种磁性转变来谈。This one is about magnetic quantum phase transitions in heavy-fermion materials. A phase transition is a change from one state of matter to another, and a quantum phase transition is driven near absolute zero by quantum fluctuations rather than heat. The author discusses such a magnetic transition in these materials.
zenodo.23330065
26exp-扩展-026_压力淬火超导_PQPexp-ext-026_Pressure-quenched superconductivity_PQPv26
这篇讲的是压力淬火超导,缩写 PQP。淬火这个词借的是金属热处理的说法,指快速改变条件、让材料来不及回到原来的样子;压力淬火就是用快速改变压力的办法,把材料留在超导态里。作者围绕这种做法来谈。This one is about pressure-quenched superconductivity, abbreviated PQP. Quenching borrows the metals term for changing conditions so fast that the material cannot relax back to its former state; pressure quenching uses a rapid pressure change to hold a material in a superconducting state. The author discusses this approach.
zenodo.23330067
27exp-扩展-027_电子云结构与游离电子动力学exp-ext-027_Electron-cloud structure and free-electron dynamicsv38
这篇讲的是电子云结构和游离电子的运动。电子云说的是电子在原子或分子周围并不沿固定轨道走,而是按一定概率分布散开;游离电子则是已经脱离原子的那些。作者围绕这两者的分布和运动来谈。This one is about electron-cloud structure and the motion of free electrons. The electron cloud means electrons around an atom or molecule are not on fixed tracks but spread out with a certain probability; free electrons are those that have left their atoms. The author discusses how both are distributed and how they move.
zenodo.23330069
28exp-扩展-028_强子谱与QCD求和规则exp-ext-028_Hadron spectra and QCD sum rulesv43
这篇讲的是强子谱和 QCD 求和规则。强子谱是强子这类参与强相互作用的粒子按质量排下来的谱系;QCD 是描述强相互作用的量子色动力学,求和规则是它给出的一套计算办法。作者用这套办法去推算强子谱。This one is about the hadron spectrum and QCD sum rules. The hadron spectrum is the lineup of strongly interacting particles ordered by mass; QCD is quantum chromodynamics, the theory of the strong interaction, and sum rules are a calculational tool it provides. The author uses that tool to work out the spectrum.
zenodo.23330071
29exp-扩展-029_QED 高阶修正与精密检验exp-ext-029_Higher-order QED corrections and precision testsv28
这篇讲的是量子电动力学(QED)的高阶修正和精密检验。QED 描述带电粒子与光怎么相互作用,高阶修正指的是把计算里更细的高次项也算进来;算得更细之后,再拿结果和实验的精密度量比对。作者围绕这一算一验来谈。This one is about higher-order corrections in quantum electrodynamics (QED) and precision tests of them. QED describes how charged particles interact with light, and higher-order corrections mean including the finer, subleading terms; the refined result is then compared with precise measurements. The author discusses that compute-and-check pairing.
zenodo.23330073
30exp-扩展-030_强子-轻子普适性exp-ext-030_Hadron-lepton universalityv32
这篇讲的是强子-轻子普适性。普适性说的是,如果某种相互作用对轻子和强子一视同仁,那么同一个过程衰变到这两类粒子时,背后的规律就应当一致。作者要处理的是,这个一致性到底成立到什么程度。This one is about hadron–lepton universality. Universality says that if an interaction treats leptons and hadrons alike, decays of the same process into either kind of particle should follow the same underlying rule. The author deals with how well that consistency actually holds.
zenodo.23330075
31exp-扩展-031_非微扰QED与束缚态exp-ext-031_Non-perturbative QED and bound statesv22
这篇讲的是非微扰 QED 和束缚态。微扰办法是把计算展开成一项项小量来近似,当相互作用强到这种展开不管用时,就得换非微扰的路子;束缚态则是电子和正电子被彼此拉住、绑在一起的状态。作者围绕这两件事来谈。This one is about non-perturbative QED and bound states. Perturbation theory approximates a calculation by expanding it in small terms, and when the interaction is too strong for that expansion to work, non-perturbative methods take over; a bound state is an electron and a positron held together. The author treats the two together.
zenodo.23330077
32exp-扩展-032_核磁矩与磁旋比exp-ext-032_Nuclear magnetic moments and the gyromagnetic ratiov19
这篇讲的是核磁矩和磁旋比。原子核像一小块磁铁,核磁矩说的就是它这份磁性有多强;磁旋比则是这份磁性和它自身角动量的比值。作者围绕这两个量怎么定、怎么量来谈,以及它们能说明什么。This one is about nuclear magnetic moments and the gyromagnetic ratio. An atomic nucleus acts like a tiny magnet, and the nuclear magnetic moment says how strong that magnetism is; the gyromagnetic ratio is that magnetism divided by the nucleus's own angular momentum. The author discusses how these quantities are fixed and measured.
zenodo.23330083
33exp-扩展-033_质子波函数exp-ext-033_Proton wave functionv28
这篇讲的是质子波函数。波函数是用来描述一个量子系统内部组分怎么分布、怎么运动的数学对象;放到质子身上,就是描述里面那些夸克和胶子处在什么状态。作者围绕质子波函数这套描述来谈。This one is about the proton wave function. A wave function is the mathematical object describing how the parts inside a quantum system are distributed and how they move; for the proton it describes the state of the quarks and gluons within. The author discusses this way of describing the proton.
zenodo.23330085
34exp-扩展-034_化学位移exp-ext-034_Chemical shiftv23
这篇讲的是化学位移。在核磁共振里,同一种原子核如果周围的化学环境不同,它的信号位置就会稍稍偏移,这个偏移就叫化学位移;反过来,它也能告诉我们原子处在什么样的环境里。作者围绕这个偏移来谈。This one is about chemical shift. In nuclear magnetic resonance, the same kind of nucleus gives a slightly shifted signal depending on its chemical surroundings, and that shift is the chemical shift; it in turn tells us what environment an atom sits in. The author discusses this shift.
zenodo.23330087
35exp-扩展-036_重味强子衰变宽度exp-ext-036_Heavy-flavour hadron decay widthsv38
这篇讲的是重味强子的衰变宽度。重味指的是含有粲夸克或者底夸克这类较重夸克;衰变宽度则是衡量一个粒子衰变快慢的量,宽度越大,衰变得越快。作者围绕这类粒子的衰变来谈。This one is about the decay widths of heavy-flavour hadrons. Heavy flavour means containing a heavier quark such as charm or bottom; a decay width measures how fast a particle decays, with a larger width meaning a quicker decay. The author discusses the decays of such particles.
zenodo.23330089
36exp-扩展-037_氢-空气爆炸极限exp-ext-037_Hydrogen-air explosion limitsv32
这篇讲的是氢与空气混合气的爆炸极限。氢气在空气里要占到一定比例才点得着,比例太低或者太高都烧不起来,这两个边界就是爆炸极限。作者围绕这个范围怎么定、受哪些因素影响来谈。This one is about the explosion limits of hydrogen–air mixtures. Hydrogen must make up a certain fraction of the air to ignite at all — too little or too much and it will not burn — and those two boundaries are the explosion limits. The author discusses how that range is set.
zenodo.23330091
37exp-扩展-038_粉尘爆炸框架exp-ext-038_Dust-explosion frameworkv26
这篇讲的是粉尘爆炸的一套分析框架。像面粉、煤粉这类细小的可燃颗粒悬浮在空气里,一旦被点着就会很快蔓延开来,造成爆炸;作者要处理的是怎么把这件事系统地分析清楚。框架指的是把各类因素组织起来的办法。This one is about a framework for analysing dust explosions. Fine combustible particles such as flour or coal dust, once suspended in air and ignited, can spread quickly and explode; the author deals with how to analyse this systematically. A framework here means an organised way of handling the relevant factors.
zenodo.23330093
38exp-扩展-039_氢脆材料exp-ext-039_Hydrogen-embrittlement materialsv46
这篇讲的是氢脆。金属在加工或者使用过程中会吸进一些氢,这些氢钻进晶格内部之后,材料就变得更容易开裂,看上去强度还在,一受力却断了。作者围绕金属吸氢变脆这件事来谈。This one is about hydrogen embrittlement in materials. Metals can take up hydrogen during processing or service, and once that hydrogen works into the lattice the material cracks more readily — it looks strong but fails under load. The author discusses metals turning brittle after absorbing hydrogen.
zenodo.23330095
39exp-扩展-040_金属氢化物-van't-Hoffexp-ext-040_Metal hydrides-van't Hoffv33
这篇讲的是金属氢化物和 van't Hoff 关系。金属氢化物是金属与氢结合成的化合物,常被用来储存氢气;van't Hoff 关系描述的则是吸氢和放氢时,温度和压力之间怎么对应。作者围绕这层对应关系来谈。This one is about metal hydrides and the van't Hoff relation. A metal hydride is a compound of a metal with hydrogen, often used to store hydrogen; the van't Hoff relation describes how temperature and pressure correspond when hydrogen is absorbed and released. The author discusses that correspondence.
zenodo.23330097
40exp-扩展-041_ΔH窗高通量筛选exp-ext-041_High-throughput screening over the ΔH windowv32
这篇讲的是按生成焓(ΔH)窗口做的高通量筛选。ΔH 是生成焓,也就是形成化合物时放出或者吸收的能量;合适的储氢材料往往落在一个特定的 ΔH 区间里,这个区间就叫窗口,而高通量筛选是成批地算、成批地挑。作者围绕这套挑法来谈。This one is about high-throughput screening within a formation-enthalpy (ΔH) window. ΔH is the enthalpy of formation, the energy released or absorbed when a compound forms, and suitable hydrogen-storage materials tend to fall in a particular ΔH range, called a window; high-throughput screening computes and selects in bulk. The author discusses this selection method.
zenodo.23330099
41exp-扩展-042_连续方程谱起源exp-ext-042_Spectral origin of the continuity equationv34
这篇讲的是连续方程的谱从哪来。像 Navier–Stokes 方程这类描述流体运动的方程,把它们分解开来会得到一组特征结构,也就是谱;作者要问的正是,这些谱结构背后的来源是什么。Navier–Stokes 方程是流体力学的基本方程。This one is about where the spectrum of continuum equations comes from. Equations such as the Navier–Stokes equations, which describe fluid flow, can be decomposed into a set of characteristic structures, a spectrum; the author asks what lies behind those structures. The Navier–Stokes equations are basic to fluid mechanics.
zenodo.23330101
42exp-扩展-043_显示材料 TADFexp-ext-043_Display materials TADFv33
这篇讲的是显示材料里的 TADF,也就是热活化延迟荧光。在有机发光二极管里,有些材料能借助一点点热量,把本来不发光的那部分激发态转成会发光的,从而提高发光的效率。作者围绕这种机制和相关的材料来谈。This one is about TADF, thermally activated delayed fluorescence, in display materials. In organic light-emitting diodes, some materials use a little heat to convert excited states that would not emit into ones that do, which raises the efficiency of light emission. The author discusses this mechanism and the related materials.
zenodo.23330103
43exp-扩展-044_固态电解质结构闭式律筛选exp-ext-044_Screening solid electrolytes by structural closed-form lawsv33
这篇讲的是固态电解质的结构筛选。固态电解质是电池里以固体形态传导离子的材料,用来替换可燃的液态电解液;闭式律指的是一套可以写成公式、直接算出来的规律。作者用这套规律去挑合适的晶体结构。This one is about screening structures for solid electrolytes. A solid electrolyte conducts ions in solid form inside a battery, replacing the flammable liquid electrolyte; a closed-form rule is one that can be written as a formula and computed directly. The author uses such rules to pick suitable crystal structures.
zenodo.23330109
44exp-扩展-045_光刻胶exp-ext-045_Photoresistsv36
这篇讲的是光刻胶。这是芯片制造里用到的一种感光材料,被光照到的部分性质会改变,显影之后就能留下图案,图案再转印到下面的材料上。作者围绕这种材料本身来谈,包括它在整个流程里的位置。This one is about photoresists. A photoresist is a light-sensitive material used in chip making: the parts struck by light change their properties, so developing leaves a pattern that can then be transferred to the material below. The author discusses this material and its place in the process.
zenodo.23330111
45exp-扩展-046_黑洞_经典精确解_史瓦西+克尔exp-ext-046_Black holes_Classical exact solutions_Schwarzschild + Kerrv34
这篇讲的是黑洞的经典精确解,具体是史瓦西解和克尔解。精确解指的是把方程严格解出来得到的答案,而不是近似;史瓦西解对应不自转的黑洞,克尔解对应会自转的黑洞。作者围绕这两个解描述的时空来谈。This one is about the classical exact solutions for black holes, specifically the Schwarzschild and Kerr solutions. An exact solution is obtained by solving the equations strictly rather than approximately; Schwarzschild's describes a non-rotating black hole and Kerr's a rotating one. The author discusses the spacetimes they describe.
zenodo.23330113
46exp-扩展-047_黑洞_视界物理_事件视界+奇点定理+热力学exp-ext-047_Black holes_Horizon physics_Event horizon + singularity theorems + thermodynamicsv42
这篇讲的是黑洞的视界物理,把事件视界、奇点定理和黑洞热力学放在一起谈。事件视界是进去就出不来的那道边界;奇点定理说明在某些条件下奇点躲不掉;黑洞热力学则给黑洞配上了温度和熵这类量。作者把这几块串起来讲。This one is about the physics of the black-hole horizon, treating the event horizon, the singularity theorems and black-hole thermodynamics together. The event horizon is the boundary beyond which nothing returns; the singularity theorems show that under certain conditions singularities are unavoidable; black-hole thermodynamics assigns quantities such as temperature and entropy. The author links these strands.
zenodo.23330115
47exp-扩展-048_黑洞_霍金辐射exp-ext-048_Black holes_Hawking radiationv30
这篇讲的是霍金辐射。按这套说法,黑洞并不是只进不出:在视界附近,量子效应会让它慢慢向外发出粒子,质量随之减少,最后有可能蒸发掉。作者围绕这个辐射过程来谈。This one is about Hawking radiation. On this account a black hole is not purely a one-way sink: near the horizon, quantum effects make it emit particles gradually, so its mass drops and it may eventually evaporate. The author discusses this radiation process.
zenodo.23330118
48exp-扩展-049_黑洞_信息悖论exp-ext-049_Black holes_The information paradoxv40
这篇讲的是黑洞信息悖论。如果把一份信息丢进黑洞,按量子力学它应当以某种形式保留下来;但按黑洞最终会完全蒸发这套图像,信息似乎就没了。这两者之间的矛盾就是信息悖论,作者围绕这个矛盾来谈。This one is about the black-hole information paradox. If information is thrown into a black hole, quantum mechanics says it should be preserved in some form, yet if the hole evaporates completely, that information seems to be gone. The clash between the two is the paradox, and the author discusses it.
zenodo.23330120
49exp-扩展-050_黑洞_视界之外_白洞+虫洞exp-ext-050_Black holes_Beyond the horizon_White holes + wormholesv35
这篇讲的是视界之外的那类时空结构,也就是白洞和虫洞。白洞和黑洞相反,只往外吐东西、不让东西进去;虫洞则是连接时空中两个不同地方的通道。两者目前都还属于理论上的设想,作者围绕它们来谈。This one is about spacetime structures beyond the horizon: white holes and wormholes. A white hole is the opposite of a black hole, spitting things out and letting nothing in; a wormhole is a passage linking two different places in spacetime. Both remain theoretical constructs, and the author discusses them.
zenodo.23330122
50exp-扩展-051_引力波_产生exp-ext-051_Gravitational waves_Generationv30
这篇讲的是引力波是怎么产生的。引力波是时空的涟漪,质量分布要想搅动出这种涟漪,得发生剧烈而且不太对称的运动,比如两个致密天体互相绕转、最后并合到一起。作者围绕这类产生过程来谈。This one is about how gravitational waves are produced. A gravitational wave is a ripple in spacetime, and to stir one up a mass distribution must move violently and not too symmetrically, as when two compact bodies spiral together and merge. The author discusses such production processes.
zenodo.23330124
51exp-扩展-052_引力波_探测与天体物理exp-ext-052_Gravitational waves_Detection and astrophysicsv36
这篇讲的是引力波的探测,以及由探测牵出的天体物理。探测这一步说的是怎么把这种极其微弱的时空扰动测出来;天体物理这一步说的则是从信号里读出源头的性质,比如质量、距离和并合过程。作者把两头连起来谈。This one is about detecting gravitational waves and the astrophysics that follows. Detection means measuring these exceedingly faint disturbances of spacetime; the astrophysics means reading off the source's properties, such as masses, distance and the merger itself. The author connects the two ends.
zenodo.23330129
52exp-扩展-053_宇宙学_引力透镜exp-ext-053_Cosmology_Gravitational lensingv30
这篇讲的是宇宙学里的引力透镜。按广义相对论,质量会弯曲周围的时空,光线经过一个大质量天体时路径也会被弯折,背后的天体看起来就被放大、拉长,甚至出现多重像。作者围绕这种透镜效应来谈。This one is about gravitational lensing in cosmology. In general relativity mass bends the surrounding spacetime, so light passing a massive body has its path curved, making the object behind appear magnified, stretched or even multiplied. The author discusses this lensing effect.
zenodo.23330131
53exp-扩展-054_宇宙学_强透镜子结构exp-ext-054_Cosmology_Strong-lensing substructurev33
这篇讲的是强引力透镜里的子结构。当透镜天体把背景天体的像拉成弧或者环时,这个像的细节里会留下透镜内部质量分布不均的痕迹,也就是子结构,比如小质量的暗物质团块。作者围绕怎么从像里看出子结构来谈。This one is about substructure in strong gravitational lensing. When a lensing body stretches a background object into arcs or rings, the details of that image carry traces of uneven mass inside the lens, that is, substructure such as small clumps of dark matter. The author discusses how to read substructure from such images.
zenodo.23330133
54exp-扩展-056_宇宙学_暴胀exp-ext-056_Cosmology_Inflationv34
这篇讲的是宇宙暴胀。暴胀说的是宇宙在极早期经历过一段非常短、却膨胀得极快的阶段;这段膨胀把原本微小的量子涨落拉大到天体尺度,成为后来结构长出来的种子。作者围绕这个设想来谈。This one is about cosmic inflation. Inflation says the very early universe went through a very brief stage of extremely rapid expansion, which stretched tiny quantum fluctuations up to astronomical scales and made them the seeds of later structure. The author discusses this proposal.
zenodo.23330135
55exp-扩展-058_粒子物理_质子半径exp-ext-058_Particle physics_Proton radiusv26
这篇讲的是质子半径,也就是质子这个粒子到底有多大。麻烦的地方在于,不同测量办法给出的数值之间一度出现明显差别,这个差别被称为质子半径之谜。作者围绕这个尺寸怎么量、量出来是多少来谈。This one is about the proton radius — how large the proton actually is. The trouble is that different measurement methods once gave clearly differing values, a discrepancy known as the proton radius puzzle. The author discusses how this size is measured and what value comes out.
zenodo.23330137
56exp-扩展-059_粒子物理_高激发态全谱exp-ext-059_Particle physics_Full spectrum of highly excited statesv42
这篇讲的是粒子物理里高激发态的全谱。把系统激发到很高的能级时,会得到一连串间隔越来越密的能级;要谈全谱,就得把这些能级一条条都算进来,而不是只看最低的那几条。作者围绕这套完整的谱来谈。This one is about the full spectrum of highly excited states in particle physics. Driving a system to very high levels yields a long series of levels that crowd closer together, and a full spectrum means accounting for all of them rather than only the lowest few. The author discusses this complete spectrum.
zenodo.23330141
57exp-扩展-060_粒子物理_希格斯宽度exp-ext-060_Particle physics_Higgs widthv35
这篇讲的是希格斯粒子的宽度。宽度在这里是衡量粒子寿命的量,宽度越大说明它衰变得越快、越不稳定;放到希格斯粒子上,就是它平均能存在多久、以多快的速度衰变掉。作者围绕这个量来谈。This one is about the width of the Higgs boson. Width here measures a particle's lifetime: the larger the width, the faster it decays and the less stable it is; for the Higgs it tells how long the particle survives on average and how quickly it decays. The author discusses this quantity.
zenodo.23330143
58exp-扩展-061_凝聚态_量子退相干exp-ext-061_Condensed matter_Quantum decoherencev23
这篇讲的是量子退相干。量子系统可以处在几个状态叠加起来的情形,但它总会和周围环境发生一点作用,这些作用会把叠加关系一点点抹掉,最后只剩下一个普通的结果。作者围绕这个被抹掉的过程来谈。This one is about quantum decoherence. A quantum system can sit in a superposition of several states, but it always interacts a little with its surroundings, and those interactions gradually erase the superposition, leaving one ordinary outcome. The author discusses this erasure.
zenodo.23330149
59exp-扩展-062_凝聚态_光片量子密码学exp-ext-062_Condensed matter_Light-sheet quantum cryptographyv30
这篇讲的是光片量子密码学。量子密码学利用量子态来分发密钥,窃听者一旦偷看就会留下痕迹;光片指的则是一种只在很薄一层介质里传播的光。作者围绕把这种薄片状的光用到量子密钥分发上的做法来谈。This one is about light-sheet quantum cryptography. Quantum cryptography distributes keys using quantum states, so that any eavesdropper leaves a trace; a light sheet is light travelling in only a very thin layer of a medium. The author discusses applying such sheet-like light to quantum key distribution.
zenodo.23330153
60exp-扩展-063_凝聚态_Majorana零模exp-ext-063_Condensed matter_Majorana zero modesv25
这篇讲的是 Majorana 零模。Majorana 粒子是指自己就是自己反粒子的那种粒子;零模说的是它出现在能量恰好为零的位置上。在凝聚态体系里,这种零模常常出现在拓扑缺陷的端点,作者围绕它来谈。This one is about Majorana zero modes. A Majorana particle is one that is its own antiparticle, and a zero mode sits at exactly zero energy. In condensed-matter systems such modes often appear at the ends of topological defects, and the author discusses this kind of mode.
zenodo.23330155
61exp-扩展-064_凝聚态_SPDC优化exp-ext-064_Condensed matter_SPDC optimisationv31
这篇讲的是自发参量下转换(SPDC)的优化。SPDC 是一束光在非线性晶体里自发分成两个光子的过程,常用来产生纠缠光子;优化说的是调整晶体、泵浦等条件,让输出的光子更合用。作者围绕这一调整来谈。This one is about optimising spontaneous parametric down-conversion (SPDC). SPDC is the process in which one light beam spontaneously splits into two photons inside a nonlinear crystal and is widely used to produce entangled photons; optimising means tuning the crystal and pump so the output suits the purpose. The author discusses that tuning.
zenodo.23330157
62exp-扩展-065_时空基础_光速极限exp-ext-065_Foundations of spacetime_The speed-of-light limitv35
这篇讲的是光速极限。真空中的光速是一个固定的上限,任何有质量的物体都没法被加速到超过它;这个限制来自相对论对时间和空间的处理方式。作者围绕这个上限为什么存在、又意味着什么来谈。This one is about the speed-of-light limit. The speed of light in vacuum is a fixed ceiling, and no object with mass can be accelerated past it; the limit follows from the way relativity treats space and time. The author discusses why this ceiling exists and what it implies.
zenodo.23330159
63exp-扩展-066_时空基础_时间箭头exp-ext-066_Foundations of spacetime_The arrow of timev33
这篇讲的是时间箭头。日常经验里过去和未来并不一样,杯子摔碎不会自己拼回去;可物理的基本方程大多不区分正反两个时间方向。作者围绕这个不对称从哪里来、又意味着什么来谈。This one is about the arrow of time. In everyday experience past and future differ — a smashed cup does not reassemble itself — yet most fundamental equations of physics do not distinguish the two directions of time. The author discusses where this asymmetry comes from and what it means.
zenodo.23330161
64exp-扩展-067_时空基础_宇宙循环exp-ext-067_Foundations of spacetime_Cosmic cyclingv37
这篇讲的是宇宙循环。循环宇宙的设想是,宇宙并不是膨胀一次就结束,而是经历膨胀、收缩,再进入下一轮,来回往复。作者围绕这个设想本身,以及支持它或者反对它的理由来谈。This one is about a cyclic universe. The idea is that the universe does not expand once and finish, but goes through expansion, contraction and then another round, over and over. The author discusses this proposal and the arguments for and against it.
zenodo.23330165
65exp-扩展-068_超核谱exp-ext-068_Hypernuclear spectrav37
这篇讲的是超核谱。超核是原子核里除了质子和中子之外,还混进了一个由奇异夸克组成的超子,比如 Λ 粒子;超核谱就是这种核的能级排列。作者围绕这些能级来谈,以及它们能说明什么。This one is about hypernuclear spectra. A hypernucleus contains, besides protons and neutrons, a hyperon built from a strange quark, such as a lambda particle; a hypernuclear spectrum is the arrangement of energy levels in such a nucleus. The author discusses these levels and what they reveal.
zenodo.23330167
66exp-扩展-069_双重子态exp-ext-069_Dibaryon statesv30
这篇讲的是双重子态。普通的重子由三个夸克组成,双重子态则是六个夸克凑在一起形成的状态,可以看成两个重子粘在一起,却又可能表现出单独一个复合体的样子。作者围绕这种态来谈。This one is about dibaryon states. An ordinary baryon is made of three quarks, whereas a dibaryon is a state formed by six quarks coming together, which can be viewed as two baryons stuck to each other yet may behave as a single composite. The author discusses such states.
zenodo.23330169
67exp-扩展-070_核物质状态方程exp-ext-070_Nuclear-matter equation of statev31
这篇讲的是核物质的状态方程。状态方程说的是,把一堆核子压到某个密度时,它的压强和能量该是多少;核物质被压得越密,这个对应关系就越难确定。作者围绕这条关系来谈。This one is about the equation of state of nuclear matter. An equation of state states, for a given density of nucleons, what the pressure and energy should be; the more densely nuclear matter is compressed, the harder that correspondence is to pin down. The author discusses this relation.
zenodo.23330171
68exp-扩展-071_中子星结构exp-ext-071_Neutron-star structurev34
这篇讲的是中子星的结构。中子星是恒星塌缩之后留下的致密残骸,物质被压得极紧;从外面的薄壳到里面的核心,密度和成分一层层变化,核心到底是什么样子目前还没有定论。作者围绕这种分层结构来谈。This one is about the structure of neutron stars. A neutron star is the dense remnant left when a star collapses, with matter packed extremely tightly; density and composition change layer by layer from the thin outer crust to the core, and what the core is like remains unsettled. The author discusses this layered structure.
zenodo.23330173
69exp-扩展-072_衰变宽度exp-ext-072_Decay widthsv31
这篇讲的是衰变宽度。一个不稳定的粒子或者激发态不会一直待着,它平均过多久衰变一次,可以用宽度这个量来表示:宽度越大,寿命越短,衰变得越快。作者围绕这个量来谈。This one is about decay width. An unstable particle or excited state does not last forever, and how quickly it decays on average can be expressed by a width: a larger width means a shorter lifetime and a faster decay. The author discusses this quantity.
zenodo.23330175
70exp-扩展-073_EDMexp-ext-073_EDMv33
这篇讲的是 EDM,也就是电偶极矩。如果一个粒子的电荷分布不是完全球形对称,正负电荷的中心就会错开一点,这份错开就是电偶极矩;它的大小可以用来检验粒子内部是不是真像理论预期那样对称。作者围绕这个量来谈。This one is about the EDM, the electric dipole moment. If a particle's charge is not perfectly spherically symmetric, its centres of positive and negative charge are slightly offset, and that offset is the electric dipole moment; its size tests whether the particle is as symmetric inside as theory expects. The author discusses this quantity.
zenodo.23330179
71exp-扩展-074_高激发态全谱exp-ext-074_Full spectrum of highly excited statesv24
这篇讲的是高激发态的全谱。把系统激发到越来越高的能级时,能级会变得密集,彼此之间的间隔也越来越小;全谱指的是把这些能级尽可能完整地算出来,而不是只挑几条来看。作者围绕这套完整的谱来谈。This one is about the full spectrum of highly excited states. As a system is excited to higher and higher levels, the levels crowd together and the gaps between them shrink; a full spectrum means computing as many of them as possible rather than picking out a few. The author discusses this complete spectrum.
zenodo.23330183
72exp-扩展-075_epsilon1混合角exp-ext-075_epsilon1 mixing anglev34
这篇讲的是 ε1 混合角。混合角描述的是两个量子态之间掺和的程度:角度为零表示两者互不掺和,角度变大则说明一个态里混进了另一个态的相当一部分。作者围绕这个参数来谈。This one is about the ε1 mixing angle. A mixing angle describes how much two quantum states blend: a zero angle means no blending, and a larger angle means one state contains a substantial share of the other. The author discusses this parameter.
zenodo.23330185
73exp-扩展-076_ChEFT交叉验证exp-ext-076_ChEFT cross-validationv26
这篇讲的是手征有效场论(ChEFT)的交叉验证。有效场论是在某个能量范围内只抓住主要自由度来写的理论,手征有效场论是核力这一层常用的版本;交叉验证是说,把它算出的结果再拿别的办法核对一遍,看是否吻合。作者围绕这一核对来谈。This one is about cross-validation of chiral effective field theory (ChEFT). An effective field theory keeps only the relevant degrees of freedom within a range of energies, and the chiral version is the one commonly used for nuclear forces; cross-validation means checking its results against another method. The author discusses that checking.
zenodo.23330187
74exp-扩展-077_DT聚变exp-ext-077_DT fusionv24
这篇讲的是 DT 聚变,也就是氘和氚的聚变。氘和氚是氢的两种较重同位素,原子核里分别多出一个和两个中子;把它们凑得足够近、融合成氦,会放出大量能量,这是目前最容易实现的一条聚变路线。作者围绕这条路来谈。This one is about DT fusion, the fusion of deuterium and tritium. Deuterium and tritium are the two heavier isotopes of hydrogen, with one and two extra neutrons in the nucleus; bringing them close enough to fuse into helium releases a great deal of energy, and this is the easiest fusion route so far. The author discusses this route.
zenodo.23330189
75exp-扩展-078_DD_D3He聚变exp-ext-078_DD_D3He fusionv22
这篇讲的是 DD 和 D-³He 这两条聚变路线。DD 是氘与氘反应,D-³He 是氘与氦-3 反应;这两条路线不产生中子,或者产生的中子少得多,因此对材料和防护的压力比常规路线小。作者围绕它们来谈。This one is about two fusion routes, DD and D-³He. DD is deuterium reacting with deuterium, and D-³He is deuterium with helium-3; these routes produce no neutrons, or far fewer, so they put less strain on materials and shielding than the conventional route. The author discusses both.
zenodo.23330191
76exp-扩展-079_p11B聚变exp-ext-079_p11B fusionv21
这篇讲的是 p-¹¹B 聚变,也就是质子与硼-11 的聚变。这条路线的主要产物是三个氦核,几乎不产生中子,因此不会让周围的结构带上放射性;代价是所需的反应条件比常规路线苛刻得多。作者围绕这条路来谈。This one is about p-¹¹B fusion, the fusion of a proton with boron-11. Its main products are three helium nuclei and it produces almost no neutrons, so it does not make surrounding structures radioactive; the price is that it demands far harsher conditions than the conventional route. The author discusses it.
zenodo.23330193
77exp-扩展-080_中子星核力输入exp-ext-080_Nuclear-force inputs for neutron starsv36
这篇讲的是研究中子星时用到的核力输入。要算中子星的结构,先得知道核子之间怎么相互作用,这一项就是核力;它取什么形式、参数定成多少,会直接改变算出来的结果。作者围绕这个输入该怎么取来谈。This one is about the nuclear-force input used in studying neutron stars. Working out a neutron star's structure requires knowing how nucleons interact, and that ingredient is the nuclear force; the form it takes and the values of its parameters directly change the computed result. The author discusses how this input is chosen.
zenodo.23330195
78exp-扩展-081_贝塔衰变率exp-ext-081_Beta decay ratesv25
这篇讲的是贝塔衰变率。β 衰变是原子核里的中子变成质子,或者反过来,同时放出一个电子和一个反中微子;衰变率说的就是这种转变发生得有多快。作者围绕这个快慢来谈。This one is about beta-decay rates. In beta decay a neutron inside a nucleus turns into a proton, or the reverse, emitting an electron and an antineutrino; the rate says how quickly that change happens. The author discusses that speed.
zenodo.23330197
79exp-扩展-082_对称能exp-ext-082_Symmetry energyv24
这篇讲的是对称能。在核物质里,如果中子和质子数量相等,能量会处在较低的状态;一旦两者的数量拉开差距,多出来的这份能量就是对称能。它的大小会影响中子星有多大、有多致密,作者围绕这个量来谈。This one is about the symmetry energy. In nuclear matter, equal numbers of neutrons and protons give a relatively low energy; when the two counts diverge, the extra energy that appears is the symmetry energy. Its size affects how large and dense a neutron star is, and the author discusses this quantity.
zenodo.23330199
80exp-扩展-083_V74_原子超精细结构_氢+铯133exp-ext-083_V74_Atomic hyperfine structure_Hydrogen + caesium-133v27
这篇讲的是原子的超精细结构,用氢和铯-133 作例子。电子的状态会受原子核自旋的影响,能级因此分裂成靠得很近的几条,这就是超精细结构;铯-133 的这一分裂还被用来定义秒。作者围绕这个结构来谈。This one is about atomic hyperfine structure, illustrated with hydrogen and Cs-133. An electron's state is affected by the nuclear spin, so a level splits into a few very closely spaced ones, which is hyperfine structure; the splitting in Cs-133 is in fact used to define the second. The author discusses this structure.
zenodo.23330202
81exp-扩展-084_V76_非微扰QCD的谱起源_七链合一exp-ext-084_V76_Spectral origin of non-perturbative QCD_Seven chains unifiedv48
这篇讲的是非微扰 QCD 里谱结构的来源,并把七条线索合成一条来讲。QCD 是描述强相互作用的量子色动力学;非微扰指的是相互作用强到不能再靠逐项展开来近似。作者要把这几条线索拼起来,说明谱是从哪里来的。This one is about where spectral structures in non-perturbative QCD come from, bringing seven strands into one account. QCD is quantum chromodynamics, the theory of the strong interaction, and non-perturbative means the interaction is too strong for term-by-term expansion. The author joins the strands to explain the origin of the spectra.
zenodo.23330204
82exp-扩展-085_循环宇宙终局裁定exp-ext-085_Adjudicating the cyclic-universe endgamev29
这篇要给循环宇宙一个了断。循环宇宙的设想是宇宙反复经历膨胀和收缩,一轮接着一轮,而不是只演一次;要做了断,就得判断这个设想在现有依据下站不站得住。作者围绕该怎么给出这个结论来谈。This one aims to settle the question of a cyclic universe. The idea is that the universe repeatedly expands and contracts, round after round, rather than playing out once; settling it means judging whether that proposal can stand on present evidence. The author discusses how such a verdict should be reached.
zenodo.23330209
83exp-扩展-086_右手中微子exp-ext-086_Right-handed neutrinosv24
这篇讲的是右手中微子。中微子几乎不与其他物质发生作用,通常被观测到的那些自旋取向偏左;右手中微子则是设想中自旋取向偏右的一类,至今没有被直接看到,常被拿来解释中微子为什么会有质量。作者围绕它来谈。This one is about right-handed neutrinos. Neutrinos hardly interact with other matter, and the ones usually observed have their spin oriented one way; a right-handed neutrino is a hypothetical counterpart of the opposite orientation, never yet seen directly and often invoked to explain why neutrinos have mass. The author discusses it.
zenodo.23330211
84exp-扩展-087_原初黑洞exp-ext-087_Primordial black holesv14
这篇讲的是原初黑洞。一般的黑洞来自大质量恒星塌缩,而原初黑洞是说在宇宙极早期,物质密度偏高的地方直接塌缩成的小黑洞;这类黑洞如果存在,可能是暗物质的一部分。作者围绕它们来谈。This one is about primordial black holes. Ordinary black holes come from the collapse of massive stars, whereas primordial ones are small black holes that would have formed directly from dense patches in the very early universe; if they exist, they could make up part of the dark matter. The author discusses them.
zenodo.23330213
85exp-扩展-088_重子光子比exp-ext-088_Baryon-to-photon ratiov32
这篇讲的是重子光子比。重子是质子、中子这一类粒子,光子则是光的粒子;这个比值说的是宇宙里重子数和光子数相比是多少,它虽然只是一个数,却和宇宙早期各种过程怎么进行有关。作者围绕这个比值来谈。This one is about the baryon-to-photon ratio. Baryons are particles such as protons and neutrons and photons are particles of light, and the ratio says how the number of baryons in the universe compares with the number of photons; although it is only a number, it bears on how processes ran in the early universe. The author discusses this ratio.
zenodo.23330216
86exp-扩展-089_标准模型基本粒子质量exp-ext-089_Standard-model elementary particle massesv29
这篇讲的是标准模型里基本粒子的质量。标准模型是描述已知基本粒子以及它们相互作用的那套理论;这些粒子的质量从哪里来、彼此之间是什么关系,是这套理论必须交代的一环。作者围绕这些质量来谈。This one is about the masses of the elementary particles in the Standard Model. The Standard Model is the theory describing the known elementary particles and their interactions; where their masses come from and how they relate to one another is a point the theory has to address. The author discusses those masses.
zenodo.23330218
87exp-扩展-091_宇宙时间线exp-ext-091_Cosmic timelinev22
这篇讲的是宇宙的时间线。也就是说,从最早的那个阶段开始,一路经过各个时期直到现在,宇宙的这些阶段是怎么排下来的、每一段发生了什么;把这条线索按顺序理清楚,是理解宇宙演化的一种办法。作者围绕它来谈。This one is about the cosmic timeline. That is, from the earliest stage onwards, through the various eras up to the present, how the stages of the universe are ordered and what happened in each; setting that sequence out in order is one way to understand cosmic evolution. The author discusses this timeline.
zenodo.23330222