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A multi-party quantum secret sharing protocol based on single photons 基于单光子的多方量子秘密共享协议
IF 2.2 3区 物理与天体物理 Q1 PHYSICS, MATHEMATICAL Pub Date : 2026-01-16 DOI: 10.1007/s11128-025-05045-5
Yuan Tian, Jialong Wang, Ying Tang, Jian Li

Quantum secret sharing (QSS) is essential for secure multi-party information distribution. However, existing multi-party quantum secret sharing (MQSS) protocols suffer from several limitations, such as requiring the distributor to know each participant’s secret in advance, low efficiency, challenging quantum resource preparation, and complex operations. This paper proposes an efficient MQSS protocol based on single photons. The protocol utilizes single photons and simple local unitary operations for secret distribution. Participants are not required to perform measurements, which reduces the difficulty of resource preparation and improves operability. By incorporating decoy particles, the protocol can ideally achieve 100% efficiency. Security analysis demonstrates its robustness against common attacks. Compared with existing protocols, the proposed scheme excels in terms of quantum resource requirements, the distributor’s prior knowledge of secrets, and qubit efficiency. Simulations on the IBM quantum platform confirm its feasibility.

量子秘密共享(QSS)是实现多方信息安全分发的关键技术。然而,现有的多方量子秘密共享(MQSS)协议存在要求分发方提前知道每个参与者的秘密、效率低、量子资源准备困难以及操作复杂等局限性。提出了一种基于单光子的高效MQSS协议。该协议利用单光子和简单的局部酉运算进行秘密分发。参与者不需要进行测量,降低了资源准备的难度,提高了可操作性。通过加入诱饵粒子,该协议可以理想地达到100%的效率。安全分析证明了它对常见攻击的鲁棒性。与现有协议相比,该方案在量子资源需求、分发者对秘密的先验知识和量子比特效率方面具有优势。在IBM量子平台上的仿真验证了其可行性。
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引用次数: 0
Electromagnetic structure of axial-vector mesons and implications for the muon g − 2 轴矢量介子的电磁结构及其对μ子g−2的意义
IF 5 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2026-01-16 DOI: 10.1103/xbls-4zqr
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引用次数: 0
Conserved quantities in expanding Gödel cosmology 膨胀Gödel宇宙学中的守恒量
IF 5 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2026-01-16 DOI: 10.1103/bcdm-3nd7
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引用次数: 0
Entanglement phases and phase transitions in monitored free fermion systems of localization 被监测的自由费米子局域系统的纠缠相和相变
IF 3.7 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2026-01-16 DOI: 10.1103/q1d9-943y
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引用次数: 0
Flexible readout and unconditional reset for superconducting multi-qubit processors with tunable Purcell filters 灵活的读出和无条件复位超导多量子位处理器与可调的珀塞尔滤波器
IF 8.6 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2026-01-16 DOI: 10.1103/vwrv-x1kr
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引用次数: 0
Demonstration of a novel phase-space painting method in a coupled lattice to mitigate space charge in high-intensity hadron beams 一种新的相空间涂绘方法在耦合晶格中减轻高强度强子光束中的空间电荷
IF 8.6 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2026-01-16 DOI: 10.1103/bvwq-34jf
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引用次数: 0
Topological charges, Fermi arcs, and surface states of K 4 crystal k4晶体的拓扑电荷、费米弧和表面态
IF 3.7 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2026-01-16 DOI: 10.1103/jc96-wrmj
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引用次数: 0
Electric-Field-Induced Insulator-to-Metal and Superconducting Transitions in Bulk Polycrystalline MoS2: Role of the Gate Electrode Configuration 电场诱导的多晶二硫化钼绝缘体到金属和超导转变:栅极结构的作用
IF 1.4 3区 物理与天体物理 Q4 PHYSICS, APPLIED Pub Date : 2026-01-16 DOI: 10.1007/s10909-025-03363-7
Y. Shimazu, T. Miyatake, K. Ueno, H. Watanabe, M. Uehara

Layered transition metal dichalcogenides, such as MoS2, are promising platforms for exploring electric-field-controlled phenomena. While gate-induced superconductivity has been extensively studied in single-crystalline MoS2 flakes, the behavior of bulk polycrystalline MoS2 under similar conditions remains unexplored. In this study, we investigate electric-field-induced phase transitions in bulk polycrystalline MoS2 using an ionic liquid (IL) gate, focusing on the role of electrode configuration and contact proximity in transport properties, and on the emergence of superconductivity in bulk samples. Three different electrode configurations were employed to examine the impact of contact geometry. In setups with distant contacts, the samples exhibited insulating behavior down to 1.8 K, whereas in the configuration with contacts placed close to the gate electrode, a clear metal–insulator transition and the onset of superconductivity were observed, with a maximum Tc of 4.2 K. Analysis revealed that the contact resistance strongly depends on the distance between the gate electrode and the voltage/current leads, differing by nearly an order of magnitude between contacts located near and far from the gate. The critical apparent sheet resistance at the metal–insulator transition was estimated to be ~ 50 Ω, much lower than the quantum resistance, likely due to penetration of the IL into the granular polycrystalline structure. These findings highlight the crucial role of electrode configuration in IL gating of bulk materials and demonstrate that electrostatic doping can induce superconductivity in polycrystalline systems, extending the scope of gate-controlled quantum phenomena to materials for which high-quality single crystals are difficult to obtain.

层状过渡金属二硫化物,如二硫化钼,是探索电场控制现象的有前途的平台。在单晶MoS2薄片中栅极诱导的超导性已经得到了广泛的研究,而在类似条件下块状多晶MoS2的超导性仍未被探索。在这项研究中,我们使用离子液体(IL)栅极研究了大块多晶二硫化钼的电场诱导相变,重点研究了电极结构和接触接近度在输运性质中的作用,以及大块样品中超导性的出现。采用三种不同的电极结构来研究接触几何形状的影响。在远距离触点设置下,样品表现出低至1.8 K的绝缘行为,而在触点靠近栅电极的配置下,观察到明显的金属-绝缘体转变和超导性的开始,最大Tc为4.2 K。分析表明,接触电阻在很大程度上取决于栅极电极和电压/电流引线之间的距离,在靠近栅极和远离栅极的接触点之间相差近一个数量级。估计金属-绝缘体过渡的临界表观片电阻为~ 50 Ω,远低于量子电阻,可能是由于IL渗透到颗粒状多晶结构中。这些发现强调了电极结构在块体材料的IL门控中的关键作用,并表明静电掺杂可以诱导多晶系统中的超导性,将门控量子现象的范围扩展到难以获得高质量单晶的材料。
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引用次数: 0
Can stochastic clocks in FLRW minisuperspace prevent dynamical singularities? FLRW微超空间中的随机时钟能防止动态奇点吗?
IF 3.5 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Pub Date : 2026-01-16 DOI: 10.1088/1361-6382/ae3424
Pradosh Keshav MV
We develop a stochastic extension of the Wheeler–DeWitt equation in Friedmann–Lemaître–Robertson–Walker (FLRW) minisuperspace and show that quantum backreaction can dynamically regulate the big bang singularity without imposing external boundary conditions. Using Laplace–Beltrami (LB) quantisation and an open-system treatment of coarse-grained graviton modes, we obtain a stochastic Hamiltonian evolution equation in which the diffusion coefficient takes the form . This multiplicative noise vanishes at the origin and renders a = 0 an entrance boundary in Feller’s classification, leading to super-exponential suppression of the LB weighted stationary density and zero probability flux into the singular point. At large scale factor, the global behaviour depends on the cosmological sector: de Sitter and positive potential-dominated regimes exhibit power-law stationary tails, whereas confining potentials or negative effective cosmological constant lead to an entrance boundary at infinity and a globally normalisable steady state. Taken together, these results indicate that stochastic backreaction arising from semiclassical coarse-graining provides a consistent and dynamical mechanism for singularity avoidance in minisuperspace quantum cosmology.
我们在friedman - lema - robertson - walker (FLRW)超空间中对Wheeler-DeWitt方程进行了随机推广,并证明了量子逆反应可以在不施加外部边界条件的情况下动态调节大爆炸奇点。利用Laplace-Beltrami (LB)量子化和对粗粒引力子模式的开放系统处理,我们得到了扩散系数为的随机哈密顿演化方程。这种乘法噪声在原点消失,使a = 0成为Feller分类中的入口边界,导致LB加权平稳密度和零概率通量进入奇点的超指数抑制。在大尺度上,全局行为取决于宇宙学领域:德西特和正势主导的体制表现出幂律固定的尾巴,而限制势或负有效宇宙学常数导致无限远的入口边界和全局可归一化的稳定状态。综上所述,这些结果表明,由半经典粗粒化引起的随机反反应为微超空间量子宇宙学中的奇点避免提供了一致的动力学机制。
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引用次数: 0
A universal design principle for switchable control of the second-order nonlinear Hall effect. 二阶非线性霍尔效应可切换控制的通用设计原则。
IF 18.1 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2026-01-16 DOI: 10.1088/1361-6633/ae3983
Xiaoliang Xiao,Xingyu Yue,Jinyang Ni,Jin-Zhu Zhao,Ruiqiang Wang,Xin Wang,Guoqing Chang,Yuanjun Jin
Manipulating the nonlinear Hall effect (NLHE) through non-volatile approach is of great significance for device applications, yet effective gating control remains elusive. In this Letter, using first-principles calculations and symmetry analysis, we propose a universal design principle for gate-field control of the NLHE in bilayer systems. Using bilayer SnSe and SnTe, the well-known ferroelectric and thermoelectric materials, as examples, it reveals that the inherent hidden polarization can activate a layer-locked hidden Berry curvature dipole (BCD) under an applied gate field, thereby inducing a giant nonlinear Hall current. The hidden polarization locked to BCD in a gate field, experiences a pseudospin Zeeman field as a spin in magnetic field. Therefore, reversing the direction of the gate-field can switch the preferred pseudospin orientation, enabling the switchable second-order NLHE. This mechanism does not require intrinsic magnetism and provides a binary ON/OFF switching control method, greatly expanding the application potential of layered systems in nonlinear Hall transport. Our findings not only demonstrate the universal design principle of the switchable second-order NLHE but also can be extended to other gate-field-controllable nonlinear transport and nonlinear optics.
通过非易失性方法控制非线性霍尔效应(NLHE)对器件应用具有重要意义,但有效的门控控制仍然难以捉摸。在本文中,我们利用第一性原理计算和对称性分析,提出了双层系统中NLHE门场控制的通用设计原则。以双层SnSe和SnTe这两种众所周知的铁电和热电材料为例,揭示了固有的隐藏极化可以在外加栅极场下激活层锁的隐藏Berry曲率偶极子(BCD),从而产生巨大的非线性霍尔电流。在门场中锁定在BCD上的隐藏极化,在磁场中经历伪自旋塞曼场。因此,改变门场方向可以改变首选伪自旋方向,从而实现可切换的二阶NLHE。该机制不需要固有磁性,并提供了二进制的ON/OFF开关控制方法,极大地扩展了层状系统在非线性霍尔输运中的应用潜力。我们的研究结果不仅证明了可切换二阶NLHE的通用设计原理,而且可以推广到其他门场可控非线性输运和非线性光学中。
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