Annalen der Physik最新文献

英文中文

Laser-Induced Optimization of Entanglement and Coherence in a Two-Qubit Molybdenum Disulfide System 双量子位二硫化钼体系中激光诱导的纠缠和相干性优化

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-11-12 DOI: 10.1002/andp.202500421

Sabrine El Asri, Fadoua Omari, Kamal Elasri, Fouad Essaadi, Yassine Oussarhan, Mohamed Jakha, Mohamed Ouhammou, Said Mouslih, Souad Taj, Bouzid Manaut

The quantum information properties of a monolayer of molybdenum disulfide exposed to a polarized monochromatic electromagnetic field are investigated. Using the density matrix at thermal equilibrium, total and correlated quantum coherence (quantified by the $� � �_{l � 1 �} � �$ -norm) and thermal entanglement (using concurrence) are analyzed. Without external radiation, entanglement is favored at low temperatures and for small band gap, spin-orbit coupling, and wave vector, but rapidly disappears under thermal fluctuations, while coherence remains robust. Under a laser field, entanglement, although reduced, becomes more resistant to temperature rise, while coherence is strongly amplified. Photon-assisted transitions renormalize the band structure and introduce new couplings between electronic states, partially stabilizing non-local correlations and reinforcing quantum superpositions. Field strength, frequency, and polarization are key control parameters, with circular polarization providing the most favorable conditions for simultaneously enhancing coherence and entanglement. The results demonstrate the dual role of electromagnetic radiation as a stabilizer and amplifier of quantum correlations and highlight the potential of molybdenum disulfide for applications in quantum computing, secure communication, and high-precision detection.

研究了暴露在极化单色电磁场下的二硫化钼单层的量子信息特性。利用热平衡时的密度矩阵，分析了总量子相干性和相关量子相干性（用11,1{1}-范数量化）和热纠缠性（用并发）。在没有外部辐射的情况下，纠缠态在低温、小带隙、自旋轨道耦合和波矢量条件下更有利，但在热波动条件下会迅速消失，而相干性保持强健。在激光场下，纠缠虽然减少，但对温度上升的抵抗力更强，而相干性则被强烈放大。光子辅助跃迁重整了能带结构，引入了电子态之间的新耦合，部分稳定了非局部相关并增强了量子叠加态。场强、频率和偏振是关键的控制参数，其中圆偏振为同时增强相干和纠缠提供了最有利的条件。结果证明了电磁辐射作为量子相关的稳定器和放大器的双重作用，并突出了二硫化钼在量子计算、安全通信和高精度检测方面的应用潜力。

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引用次数: 0

Structure of Reversible Quantum Channels 可逆量子通道的结构

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-11-11 DOI: 10.1002/andp.202500473

Yuan Li, Shunlong Luo, Yuan Sun

Reversibility of quantum channels is a fundamental and key issue in quantum dynamics, with unitary evolutions as prototypical examples. However, there are reversible quantum channels going beyond unitary evolutions. In this work, we provide some characterizations of reversible quantum channels by relating recovery maps of reversible quantum channels with their dual maps. We analyze the structure of recovery maps of reversible quantum channels and provide a decomposition result for them. These structural results reveal some intrinsic aspects of reversible quantum channels and their recovery maps, and may be useful for the study of quantum dynamics and quantum error correction.

量子通道的可逆性是量子动力学中的一个基本问题和关键问题，以酉进化为典型的例子。然而，存在超越单一演化的可逆量子通道。在这项工作中，我们通过将可逆量子通道的恢复映射与其对偶映射联系起来，提供了可逆量子通道的一些特征。我们分析了可逆量子信道的恢复映射结构，并给出了它们的分解结果。这些结构结果揭示了可逆量子通道及其恢复图的某些内在方面，并可能对量子动力学和量子纠错的研究有用。

引用次数: 0

Issue Information: Ann. Phys. 11/2025 发布信息：Ann。理论物理的11/2025

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-11-11 DOI: 10.1002/andp.70080

引用次数: 0

Unconventional Thermoelectric Phenomena and Materials 非常规热电现象与材料

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-11-10 DOI: 10.1002/andp.202500530

Ulrich Eckern, Claudia Felser, Anke Weidenkaff

引用次数: 0

Quantum GraviElectro Dynamics 量子重力电动力学

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-11-08 DOI: 10.1002/andp.202500318

Yoshimasa Kurihara

This report presents a possible attempt at renormalizable quantum gravity based on the standard BRST quantization used for Yang–Mills theory. The BRST invariant Lagrangian of the gravitationally interacting $� � � U � (� 1 �) � � �$ gauge theory is provided, namely the Quantum GraviElectro Dynamics (QGED), including the gauge fixing and the ghost Lagrangian. A set of Feynman rules is extracted in the local inertial frame where gravity locally vanishes from this Lagrangian. Using the Feynman rules of the QGED constructed here, all the renormalization constants are build and it is showed that the theory is perturbatively renormalizable, at least in the one-loop order. All infinite naked objects in the naked Lagrangian can replace experimentally measured ones. In addition to the standard $� � QED � �$ parameters, it is showed that the gravitational coupling constant can be experimentally measured. A running effect of the gravitational coupling constant and the perturbative estimation of the Hawking radiation as examples of perturbative QGED is also discussed. The difference between this theory and the widely known un-renormalizable quantum general relativity is clarified.

本报告提出了一种基于杨-米尔斯理论中使用的标准BRST量子化的可重整量子引力的可能尝试。给出了引力相互作用U(1)$ U(1)$规范理论的BRST不变拉格朗日量，即量子引力电动力学（QGED），包括规范固定量和鬼拉格朗日量。在局部惯性系中提取了一组费曼规则，其中引力从拉格朗日量中局部消失。利用本文构造的QGED的费曼规则，建立了所有的重整化常数，并证明了该理论至少在单环阶上是微扰重整化的。在裸拉格朗日量中，所有无限的裸物体都可以代替实验测量的物体。除了标准的QED $text{QED}$参数外，还表明可以通过实验测量引力耦合常数。讨论了引力耦合常数的运行效应和霍金辐射的摄动估计作为摄动QGED的例子。澄清了这一理论与广为人知的不可重整量子广义相对论之间的区别。

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引用次数: 0

Disorder-Induced Transitions in Topological Phases of the Hofstadter Model 霍夫施塔特模型拓扑相的无序诱导跃迁

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-11-08 DOI: 10.1002/andp.202500423

Junais Habeeb Mokkath

Topological phases of matter are known for their robustness against perturbations, yet their stability under disorder remains an open question of both theoretical and experimental relevance. We study the disordered Hofstadter model, where magnetic flux generates fractal minibands carrying nontrivial Chern numbers. Using numerical simulations, we construct a disorder–flux phase diagram by computing Chern numbers and gap statistics across a wide range of parameters. We find that weak to moderate disorder preserves quantized Chern phases, while strong disorder closes mobility gaps, induces Chern-number fluctuations, and drives transitions to trivial insulating states. Our results provide direct guidelines for engineering disorder and flux in synthetic lattices, with implications for quantum simulation and quantum device design.

物质的拓扑相以其对扰动的鲁棒性而闻名，但它们在无序状态下的稳定性仍然是一个理论和实验相关的开放问题。我们研究了无序霍夫斯塔德模型，其中磁通量产生带有非平凡陈恩数的分形小带。在数值模拟的基础上，通过计算各种参数的陈氏数和间隙统计量，构建了无序磁通相图。我们发现弱到中等无序保留了量子化的陈氏相，而强无序关闭迁移率间隙，诱导陈氏数波动，并驱动跃迁到平凡的绝缘状态。我们的结果为合成晶格的工程无序和通量提供了直接的指导，对量子模拟和量子器件设计具有指导意义。

引用次数: 0

Pressure Induced Superconducting Electrides in Xenon-Bearing Lithium Compounds 含氙锂化合物中的压力诱导超导电子

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-11-06 DOI: 10.1002/andp.202500417

Weishuo Xu, Tingting Gu, Jian Hao, Jingming Shi, Wenwen Cui, Yinwei Li

Within the framework of electron-rich system theory, noble gas-containing (NG) compounds can accommodate a high density of interstitial quasiatoms (ISQs), making them promising candidates for the realization of electrides. Notably, lithium and helium have been theoretically predicted to form a superconducting electride at 800 GPa, whereas extreme pressure requirements pose significant experimental challenges. In contrast, xenon (Xe), the most chemically reactive noble gas, offers a compelling alternative for the formation of NG-based electrides at comparatively lower pressures. In this work, a combination of crystal structure prediction and first-principles calculations is employed to systematically investigate the Li–Xe system at a pressure range of 0–100 GPa. These calculations reveal three hitherto unknown Li–Xe compounds thermodynamically stabilized below 50 GPa, such as <math> <semantics> <mrow> <msub> <mi>Li</mi> <mn>7</mn> </msub> <mi>Xe</mi> </mrow> <annotation>${rm Li}_7{rm Xe}$</annotation> </semantics></math>, <math> <semantics> <mrow> <msub> <mi>Li</mi> <mn>8</mn> </msub> <mi>Xe</mi> </mrow> <annotation>${rm Li}_8{rm Xe}$</annotation> </semantics></math>, and <math> <semantics> <mrow> <msub> <mi>Li</mi> <mn>9</mn> </msub> <mi>Xe</mi> </mrow> <annotation>${rm Li}_9{rm Xe}$</annotation> </semantics></math>. All these compounds are identified as electrides, with maximum ISQs of 3.8 <math> <semantics> <msup> <mi>e</mi> <mo>−</mo> </msup> <annotation>$e^-$</annotation> </semantics></math>. In addition, large electron transfer from Li to Xe is observed, gaining electrons ranging from 1.46 to 2.8 <math> <semantics> <msup> <mi>e</mi> <mo>−</mo> </msup> <annotation>$e^-$</annotation> </semantics></math>, indicating a strong electron affinity of the Xe atom. Further electron-phonon coupling calculations show that all these compounds are superconducting, exhibiting notable superconductivity among NG-based systems. Specifically, <math> <semantics> <mrow> <msub> <mi>Li</mi> <mn>9</mn> </msub> <mi>Xe</mi> </mrow> <annotation>${

在富电子系统理论的框架下，稀有气体（NG）化合物可以容纳高密度的间隙准原子（ISQs），使其成为实现电子的有希望的候选者。值得注意的是，理论上预测锂和氦在800 GPa的压力下可以形成超导电极，然而极端的压力要求给实验带来了重大挑战。相比之下，氙（Xe），最具化学活性的惰性气体，为在相对较低的压力下形成基于天然气的电子提供了一个令人信服的选择。在这项工作中，采用晶体结构预测和第一性原理计算相结合的方法，系统地研究了0-100 GPa压力范围内的Li-Xe体系。这些计算揭示了三种迄今为止未知的Li - Xe化合物在50gpa以下热力学稳定，如Li 7 Xe ${rm Li}_7{rm Xe}$, Li 8 Xe ${rm Li}_8{rm Xe}$，和Li 9 Xe ${rm Li}_9{rm Xe}$。所有这些化合物都被鉴定为电子，最大isq为3.8 e−$e^-$。此外，观察到大量电子从Li转移到Xe，获得的电子范围从1.46到2.8 e−$e^-$，表明Xe原子具有很强的电子亲和力。进一步的电子-声子耦合计算表明，所有这些化合物都是超导的，在ng基体系中表现出显著的超导性。具体来说，Li 9 Xe ${rm Li}_9{rm Xe}$在70 GPa下的超导临界温度为10 K。这项工作为在极端条件下探索具有丰富物理性质的稀有气体化合物提供了见解。

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引用次数: 0

Logarithmic and Strong Coupling Models in Weyl-Type f ( Q , T ) $f(Q,T)$ Gravity weyl型f(Q，T)$ f(Q，T)$重力的对数和强耦合模型

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-10-30 DOI: 10.1002/andp.202500429

Rahul Bhagat, S. K. Tripathy, B. Mishra

In this study, the cosmological implications of Weyl-type <math> <semantics> <mrow> <mi>f</mi> <mo>(</mo> <mi>Q</mi> <mo>,</mo> <mi>T</mi> <mo>)</mo> </mrow> <annotation>$f(Q,T)$</annotation> </semantics></math> gravity are explored, a modified gravitational theory formulated from Weyl geometry. The nonmetricity scalar <math> <semantics> <mi>Q</mi> <annotation>$Q$</annotation> </semantics></math> is coupled to the trace <math> <semantics> <mi>T</mi> <annotation>$T$</annotation> </semantics></math> of the energy-momentum tensor. Two models are analyzed based on the logarithmic and strong coupling form of the function <math> <semantics> <mrow> <mi>f</mi> <mo>(</mo> <mi>Q</mi> <mo>,</mo> <mi>T</mi> <mo>)</mo> </mrow> <annotation>$f(Q,T)$</annotation> </semantics></math>. The corresponding field equations are then solved numerically after reformulating the system in terms of redshift. The joint datasets CC+Union3.0+DESI DR2 and CC+<math> <semantics> <msup> <mi>Pantheon</mi> <mo>+</mo> </msup> <annotation>${rm Pantheon}^+$</annotation> </semantics></math>+DESI DR2 are employed to perform a Markov Chain Monte Carlo (MCMC) analysis for constraining the model parameters. Using the constrained parameters, the geometrical and dynamical aspects of the models are analyzed. The results successfully describe a transition from decelerated to accelerated expansion for both models. Both models exhibit quintessence-like behavior and approach the <math> <semantics> <mrow> <mi>Λ</mi> <mi>CDM</mi> </mrow> <annotation>$Lambda{rm CDM}$</annotation> </semantics></math> scenario at the present epoch (<math> <semantics> <mrow> <msub> <mi>z</mi> <mn>0</mn> </msub> <mo>=</mo> <mn>0</mn> </mrow> <annotation>$z_0 = 0$</annotation> </semantics></math>). The Logarithmic model closely follows <math> <semantics> <mrow> <m

本研究探讨了Weyl型f(Q，T)$ f(Q，T)$引力的宇宙学意义，这是一个由Weyl几何构造的修正引力理论。非度量标量Q$ Q$与能量动量张量的轨迹T$ T$耦合。基于函数f(Q，T)$ f(Q，T)$的对数和强耦合形式，分析了两种模型。在用红移的形式重新表述系统后，对相应的场方程进行了数值求解。采用联合数据集CC+Union3.0+DESI DR2和CC+ Pantheon +$ {rm Pantheon}^+$ +DESI DR2进行马尔可夫链蒙特卡罗（MCMC）分析，对模型参数进行约束。利用约束参数对模型的几何和动力学特性进行了分析。结果成功地描述了两个模型从减速膨胀到加速膨胀的转变。两个模型都表现出典型的行为，并且在当前epoch接近Λ CDM $Lambda{rm CDM}$场景（z 0 = 0$ z_0 = 0$）。对数模型紧跟Λ CDM $Lambda{rm CDM}$，在后期逼近q =−1$ q = -1$，虽然强耦合模型在0 <； z < 1$ 0 < z < 1$时表现出类似的减速，但转变为类似幽灵的行为（z < 0$ z < 0$），预示着未来的超级加速扩张。每个模型计算出的宇宙年龄与普朗克和恒星年龄数据的约束条件一致。证明了强能条件的违背，零能条件和优势能条件的满足。

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引用次数: 0

Multi-Channel Vortex Beam and Grayscale Image Generated by Dynamically Controllable Terahertz Metasurface 动态可控太赫兹超表面生成的多通道涡旋光束和灰度图像

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-10-25 DOI: 10.1002/andp.202500391

Dingkun Chen, Chaoxian Tang, Ziyin Xu, Zhengyong Song

Micro-nano technology and material science have rapidly evolved, and they lead to the emergence of metasurface. However, there are scarce studies on multi-channel metasurface to generate orbital angular momentum (OAM) and grayscale image (GI) simultaneously. In this work, the metasurface introduces Malus’ law and spin decoupling to modulate terahertz wavefronts. The designed metasurface consists of the following layers from top to bottom: VO₂ patches, silica spacer, gold patches embedded in the VO₂ layer, silica spacer, and gold substrate. For high-conductivity VO₂ exhibiting a metallic state, the VO₂ metasurface achieves a vortex beam (VB) with topological charge (TC) of l = 1 under right-handed circularly polarized (RCP) incidence, and it obtains a VB with a gradient phase and $� � � � TC � � � = � 2 � � �$ under left-handed circularly polarized (LCP) incidence. Meanwhile, GI B is observed in the near field under y-polarized incidence. For low-conductivity VO₂ exhibiting an insulating state, the gold structure embedded in the VO₂ film takes control of the electromagnetic wave. Metasurface obtains a VB with a gradient phase and $� � � � TC � � � = � - � 1 � � �$ in the LCP channel, and it achieves a VB with $� � � � TC � � � = � - � 2 � � �$ in the RCP channel. Simultaneously, GI A is shown in the near field under y-polarized incidence. The vast potential of metasurface for applications in imaging and information processing is demonstrated.

微纳米技术和材料科学的迅速发展，导致了超表面的出现。然而，多通道超表面同时生成轨道角动量（OAM）和灰度图像（GI）的研究很少。在这项工作中，超表面引入了马勒斯定律和自旋去耦来调制太赫兹波前。所设计的超表面由以下层组成：VO2贴片、二氧化硅间隔层、嵌入在VO2层中的金贴片、二氧化硅间隔层和金衬底。对于表现为金属态的高导电性VO2，在右手圆极化（RCP）入射下，VO2超表面产生了拓扑电荷（TC）为1的涡束（VB）；在左旋圆极化（LCP）入射下，得到了一个相位梯度且TC = 2$ { mathm {TC}} = 2$的VB。同时，在y偏振入射下，在近场观测到GI B。对于表现为绝缘状态的低电导率VO2，嵌入在VO2薄膜中的金结构控制了电磁波。Metasurface在LCP通道中得到一个梯度相位且TC = - 1$ { mathm {TC}} = - 1$的VB；在RCP信道中实现了TC =−2$ { mathm {TC}} = - 2$的VB。同时，在y偏振入射下，近场显示了GI A。超表面在成像和信息处理方面的应用潜力巨大。

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引用次数: 0

Quantum Anomalous Hall Effect in a Linear Spin-Gapless Semiconducting 2D Zn2N3 Monolayer 线性无自旋间隙半导体二维Zn2N3单层中的量子反常霍尔效应

IF 2.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annalen der Physik

Pub Date : 2025-10-19 DOI: 10.1002/andp.202500419

Yang Li

The search for zero-gap spin-polarized materials such as spin-gapless semiconductors (SGSs) and their interplay with topological phases is of central importance for realizing dissipationless spintronic functionalities, with the quantum anomalous Hall (QAH) effect being a particularly appealing target. Kagome lattices provide a natural platform for such physics owing to their possible Weyl-like dispersions and strong correlation effects. Here, by first-principle calculations, the kagome-lattice Zn₂N₃ monolayer is identified as a 2D linear SGS that hosts intrinsic ferromagnetism with a Curie temperature of 204 K. In the absence of spin–orbit coupling (SOC), the system exhibits spin-down Weyl-like crossings and spin-up gap at the Fermi level with complete spin polarization. SOC lifts these degeneracies, opening a topological gap and inducing an intrinsic QAH state with Chern number 𝐶 = 1 and chiral edge states, which remain stable under biaxial strain up to 10%. These results establish Zn₂N₃ as a robust platform for next-generation spintronic and topological quantum devices with ultralow energy dissipation.

寻找零间隙自旋极化材料，如无自旋间隙半导体（SGSs）及其与拓扑相的相互作用，对于实现无耗散自旋电子功能至关重要，量子反常霍尔（QAH）效应是一个特别吸引人的目标。Kagome晶格由于其可能的类韦尔色散和强相关效应，为这种物理提供了一个天然的平台。在这里，通过第一性原理计算，kagome晶格Zn2N3单层被确定为二维线性SGS，具有固有铁磁性，居里温度为204 K。在没有自旋轨道耦合（SOC）的情况下，系统在费米能级表现出自旋向下的类韦尔交叉和自旋向上的间隙，具有完全的自旋极化。SOC提升了这些简并性，打开了一个拓扑缺口，并诱导了Chern数为 = 1的本征QAH态和手性边缘态，在高达10%的双轴应变下保持稳定。这些结果表明Zn2N3是下一代自旋电子和拓扑量子器件的强大平台，具有超低能量耗散。

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