Physical Review最新文献_第10页

Spectral crossovers in non-Hermitian spin chains: Comparison with random matrix theory 非厄米自旋链中的谱交叉:与随机矩阵理论的比较

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreve.108.054210

Ayana Sarkar, Sunidhi Sen, Santosh Kumar

{"title":"Spectral crossovers in non-Hermitian spin chains: Comparison with random matrix theory","authors":"Ayana Sarkar, Sunidhi Sen, Santosh Kumar","doi":"10.1103/physreve.108.054210","DOIUrl":"https://doi.org/10.1103/physreve.108.054210","url":null,"abstract":"We present a systematic investigation of the short-range spectral fluctuation properties of three non-Hermitian spin-chain Hamiltonians using complex spacing ratios (CSRs). Specifically, we focus on the non-Hermitian variants of the standard one-dimensional anisotropic XY model having intrinsic rotation-time ($mathcal{RT}$) symmetry that has been explored analytically by Zhang and Song [Phys. Rev. A 87, 012114 (2013)]. The corresponding Hermitian counterpart is also exactly solvable and has been widely employed as a toy model in several condensed matter physics problems. We show that the presence of a random field along the $x$ direction together with the one along the $z$ direction facilitates integrability and $mathcal{RT}$-symmetry breaking, leading to the emergence of quantum chaotic behavior. This is evidenced by a spectral crossover closely resembling the transition from Poissonian to Ginibre unitary ensemble (GinUE) statistics of random matrix theory. Additionally, we consider two phenomenological random matrix models in this paper to examine 1D Poisson to GinUE and 2D Poisson to GinUE crossovers and the associated signatures in CSRs. Here 1D and 2D Poisson correspond to real and complex uncorrelated levels, respectively. These crossovers reasonably capture spectral fluctuations observed in the spin-chain systems within a certain range of parameters.","PeriodicalId":20121,"journal":{"name":"Physical Review","volume":"114 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135342127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Instability of mixing layers: Momentum and thermal transport in the continuum breakdown regime 混合层的不稳定性:连续介质击穿中的动量和热输运

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreve.108.l053101

Vishnu Mohan, A. Sameen, Balaji Srinivasan, Sharath S. Girimaji

引用次数: 0

Desynchrony induced by higher-order interactions in triplex metapopulations 三重元种群中由高阶相互作用引起的非同步

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreve.108.054208

Palash Kumar Pal, Md Sayeed Anwar, Dibakar Ghosh

{"title":"Desynchrony induced by higher-order interactions in triplex metapopulations","authors":"Palash Kumar Pal, Md Sayeed Anwar, Dibakar Ghosh","doi":"10.1103/physreve.108.054208","DOIUrl":"https://doi.org/10.1103/physreve.108.054208","url":null,"abstract":"In a predator-prey metapopulation, two traits are adversely related: synchronization and persistence. A decrease in synchrony apparently leads to an increase in persistence and, therefore, necessitates the study of desynchrony in a metapopulation. In this article, we study predator-prey patches that communicate with one another while being interconnected through distinct dispersal structures in the layers of a three-layer multiplex network. We investigate the synchronization phenomenon among the patches of the outer layers by introducing higher-order interactions (specifically three-body interactions) in the middle layer. We observe a decrease in the synchronous behavior or, alternatively, an increase in desynchrony due to the inclusion of group interactions among the patches of the middle layer. The advancement of desynchrony becomes more prominent with increasing strength and numbers of three-way interactions in the middle layer. We analytically validate our numerical results by performing a stability analysis of the referred synchronous solution using the master stability function approach. Additionally, we verify our findings by taking into account two distinct predator-prey models and dispersal topologies, which ultimately supports that the findings are generalizable across various models and dispersal structures.","PeriodicalId":20121,"journal":{"name":"Physical Review","volume":"75 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relativistic calculation of nondipole effects in high-order harmonic generation 高次谐波产生中非偶极子效应的相对论计算

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreva.108.052808

I. A. Ivanov, Kyung Taec Kim

引用次数: 0

Sunburst quantum Ising model under interaction quench: Entanglement and role of initial state coherence 相互作用猝灭下的太阳爆发量子Ising模型:纠缠和初始态相干的作用

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreve.108.054114

Akash Mitra, Shashi C. L. Srivastava

引用次数: 1

Nonmonotonic enhancement of diversity-induced resonance in systems of mobile oscillators 移动振子系统中分集共振的非单调增强

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreve.108.054209

Cong Liu, Zhi-Xi Wu, Jian-Yue Guan

{"title":"Nonmonotonic enhancement of diversity-induced resonance in systems of mobile oscillators","authors":"Cong Liu, Zhi-Xi Wu, Jian-Yue Guan","doi":"10.1103/physreve.108.054209","DOIUrl":"https://doi.org/10.1103/physreve.108.054209","url":null,"abstract":"Diversity is omnipresent in natural and synthetic extended systems, the phenomenon of diversity-induced resonance (DIR), wherein a moderate degree of the diversity can provoke an optimal collective response, provides researchers a brand-new strategy to amplify and utilize the weak signal. As yet the relevant advances focus mostly on the ideal situations where the interactions among elements are uncorrelated with the physical proximity of agents. Such a consideration overlooks interactions mediated by the motion of agents in space. Here, we investigate the signal response of an ensemble of spatial mobile heterogeneous bistable oscillators with two canonical interacting modes: dynamic and preset. The oscillators are considered as mass points and perform random walks in a two-dimensional square plane. Under the dynamic scheme, the oscillators can only interact with other oscillators within a fixed vision radius. For the preset circumstance, the interaction among oscillators occurs only when all of them are in a predefined region at the same moment. We find that the DIR can be obtained in both situations. Additionally, the strength of resonance nonmonotonically rises with respect to the increase of moving speed, and the optimal resonance is acquired by an intermediate magnitude of speed. Finally, we propose reduced equations to guarantee the occurrence of such mobility-optimized DIR on the basis of the fast switching approximation theory and also examine the robustness of such phenomenon through the excitable FitzHugh-Nagumo model and a different spatial motion mechanism. Our results reveal for the first time that the DIR can be optimized by the spatial mobility and thus has promising potential application in the communication of mobile agents.","PeriodicalId":20121,"journal":{"name":"Physical Review","volume":"95 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wave operator representation of quantum and classical dynamics 量子与经典动力学的波算符表示

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreva.108.052208

Gerard McCaul, Dmitry V. Zhdanov, Denys I. Bondar

{"title":"Wave operator representation of quantum and classical dynamics","authors":"Gerard McCaul, Dmitry V. Zhdanov, Denys I. Bondar","doi":"10.1103/physreva.108.052208","DOIUrl":"https://doi.org/10.1103/physreva.108.052208","url":null,"abstract":"The choice of mathematical representation when describing physical systems is of great consequence, and this choice is usually determined by the properties of the problem at hand. Here we examine the little-known wave operator representation of quantum dynamics and explore its connection to standard methods of quantum dynamics, such as the Wigner phase-space function. This method takes as its central object the square root of the density matrix and consequently enjoys several unusual advantages over standard representations. By combining this with purification techniques imported from quantum information, we are able to obtain a number of results. Not only is this formalism able to provide a natural bridge between phase- and Hilbert-space representations of both quantum and classical dynamics, we also find the wave operator representation leads to semiclassical approximations of both real and imaginary time dynamics, as well as a transparent correspondence to the classical limit. It is then demonstrated that there exist a number of scenarios (such as thermalization) in which the wave operator representation possesses an equivalent unitary evolution, which corresponds to nonlinear real-time dynamics for the density matrix. We argue that the wave operator provides a new perspective that links previously unrelated representations and is a natural candidate model for scenarios (such as hybrids) in which positivity cannot be otherwise guaranteed.","PeriodicalId":20121,"journal":{"name":"Physical Review","volume":"83 s369","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tight and attainable quantum speed limit for open systems 开放系统的严格和可实现的量子速度限制

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreva.108.052207

Zi-yi Mai, Chang-shui Yu

引用次数: 1

Reply to “Comment on ‘Multitime quantum communication: Interesting but not counterfactual' ” 回复“关于‘多时间量子通信:有趣但不是反事实’的评论”

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreva.108.056202

Robert B. Griffiths

引用次数: 0

Casimir and Casimir-Polder interactions for magneto-dielectric materials: Surface scattering expansion 磁介质材料的卡西米尔和卡西米尔-波德相互作用:表面散射膨胀

Physical Review Pub Date : 2023-11-08 DOI: 10.1103/physreva.108.052807

Giuseppe Bimonte, Thorsten Emig

{"title":"Casimir and Casimir-Polder interactions for magneto-dielectric materials: Surface scattering expansion","authors":"Giuseppe Bimonte, Thorsten Emig","doi":"10.1103/physreva.108.052807","DOIUrl":"https://doi.org/10.1103/physreva.108.052807","url":null,"abstract":"We develop a general multiple scattering expansion (MSE) for computing Casimir forces between magneto-dielectric bodies and Casimir-Polder forces between polarizable particles and magneto-dielectric bodies. The approach is based on fluctuating electric and magnetic surface currents and charges. The surface integral equations for these surface fields can be formulated in terms of surface scattering operators (SSOs). We show that there exists an entire family of such operators. One particular member of this family is only weakly divergent and allows for a MSE that appears to be convergent for general magneto-dielectric bodies. We prove a number of properties of this operator, and demonstrate explicitly convergence for sufficiently low and high frequencies, and for perfect conductors. General expressions are derived for the Casimir interaction between macroscopic bodies and for the Casimir-Polder interaction between particles and macroscopic bodies in terms of the SSO, both at zero and finite temperatures. An advantage of our approach over previous scattering methods is that it does not require the knowledge of the scattering amplitude ($T$ operator) of the bodies. A number of simple examples are provided to demonstrate the use of the method. Some applications of our approach have appeared previously [T. Emig and G. Bimonte, Phys. Rev. Lett. 130, 200401 (2023)]. Here we provide additional technical aspects and details of our approach.","PeriodicalId":20121,"journal":{"name":"Physical Review","volume":"107 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1