Physical Review E最新文献_第2页

Neural-network quantum-state study of the long-range antiferromagnetic Ising chain. 长程反铁磁性伊辛链的神经网络量子态研究。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.064123

Jicheol Kim, Dongkyu Kim, Dong-Hee Kim

{"title":"Neural-network quantum-state study of the long-range antiferromagnetic Ising chain.","authors":"Jicheol Kim, Dongkyu Kim, Dong-Hee Kim","doi":"10.1103/PhysRevE.109.064123","DOIUrl":"https://doi.org/10.1103/PhysRevE.109.064123","url":null,"abstract":"We investigate quantum phase transitions in the transverse field Ising chain with algebraically decaying long-range (LR) antiferromagnetic interactions using the variational Monte Carlo method with the restricted Boltzmann machine employed as a trial wave function ansatz. First, we measure the critical exponents and the central charge through the finite-size scaling analysis, verifying the contrasting observations in the previous tensor network studies. The correlation function exponent and the central charge deviate from the short-range (SR) Ising values at a small decay exponent α_{LR}, while the other critical exponents examined are very close to the SR Ising exponents regardless of α_{LR} examined. However, in the further test of the critical Binder ratio, we find that the universal ratio of the SR limit does not hold for α_{LR}<2, implying a deviation in the criticality. On the other hand, we find evidence of the conformal invariance breakdown in the conformal field theory (CFT) test of the correlation function. The deviation from the CFT description becomes more pronounced as α_{LR} decreases, although a precise breakdown threshold is yet to be determined.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamic cost for precision of general counting observables. 一般计数观测指标精度的热力学成本。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.064128

Patrick Pietzonka, Francesco Coghi

引用次数: 0

Dual residence time for droplets to coalesce with a liquid surface. 液滴与液体表面凝聚的双重停留时间。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.065109

Ting-Heng Hsieh, Wei-Chi Li, Tzay-Ming Hong

引用次数: 0

Shock wave formation in radiative plasmas. 辐射等离子体中冲击波的形成。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.065206

F Garcia-Rubio, V Tranchant, E C Hansen, A Reyes, R Tabassum, H U Rahman, P Ney, E Ruskov, P Tzeferacos

{"title":"Shock wave formation in radiative plasmas.","authors":"F Garcia-Rubio, V Tranchant, E C Hansen, A Reyes, R Tabassum, H U Rahman, P Ney, E Ruskov, P Tzeferacos","doi":"10.1103/PhysRevE.109.065206","DOIUrl":"https://doi.org/10.1103/PhysRevE.109.065206","url":null,"abstract":"The temporal evolution of weak shocks in radiative media is theoretically investigated in this work. The structure of radiative shocks has traditionally been studied in a stationary framework. Their systematic classification is complex because layers of optically thick and thin regions alternate to form a radiatively driven precursor and a temperature-relaxation layer, between which the hydrodynamic shock is embedded. In this work we analyze the formation of weak shocks when two radiative plasmas with different pressures are put in contact. Applying a reductive perturbative method yields a Burgers-type equation that governs the temporal evolution of the perturbed variables including the radiation field. The conditions upon which optically thick and thin solutions exist have been derived and expressed as a function of the shock strength and Boltzmann number. Below a certain Boltzmann number threshold, weak shocks always become optically thick asymptotically in time, while thin solutions appear as transitory structures. The existence of an optically thin regime is related to the presence of an overdense layer in the compressed material. Scaling laws for the characteristic formation time and shock width are provided for each regime. The theoretical analysis is supported by FLASH simulations, and a comprehensive test case has been designed to benchmark radiative hydrodynamic codes.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trapping of isotropic droplets by disclinations in nematic liquid crystals controlled by surface anchoring and elastic constant disparity. 向列液晶中各向同性液滴受表面锚定和弹性常数不等控制的分离捕集。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.064703

Nilanthi P Haputhanthrige, Sathyanarayana Paladugu, Maxim O Lavrentovich, Oleg D Lavrentovich

{"title":"Trapping of isotropic droplets by disclinations in nematic liquid crystals controlled by surface anchoring and elastic constant disparity.","authors":"Nilanthi P Haputhanthrige, Sathyanarayana Paladugu, Maxim O Lavrentovich, Oleg D Lavrentovich","doi":"10.1103/PhysRevE.109.064703","DOIUrl":"https://doi.org/10.1103/PhysRevE.109.064703","url":null,"abstract":"Linear defects such as dislocations and disclinations in ordered materials attract foreign particles since they replace strong elastic distortions at the defect cores. In this work, we explore the behavior of isotropic droplets nucleating at singular disclinations in a nematic liquid crystal, predesigned by surface photopatterning. Experiments show that in the biphasic nematic-isotropic region, although the droplets are attracted to the disclination cores, their centers of mass shift away from the core centers as the temperature increases. The shift is not random, being deterministically defined by the surrounding director field. The effect is explained by the balance of interfacial anchoring and bulk elasticity. An agreement with the experiment can be achieved only if the model accounts for the disparity of the nematic elastic constants; the so-called one-constant approximation, often used in the theoretical analysis of liquid crystals, produces qualitatively wrong predictions. In particular, the experimentally observed shift towards the bend region around a +1/2 disclination core can be explained only when the bend constant is larger than the splay constant. The described dependence of the precise location of a foreign inclusion at defect cores on the elastic and surface anchoring properties can be used in rational design of microscale architectures.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular dynamics study of the sonic horizon of microscopic Laval nozzles. 微观拉瓦尔喷嘴音界的分子动力学研究。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.065104

Helmut Ortmayer, Robert E Zillich

{"title":"Molecular dynamics study of the sonic horizon of microscopic Laval nozzles.","authors":"Helmut Ortmayer, Robert E Zillich","doi":"10.1103/PhysRevE.109.065104","DOIUrl":"https://doi.org/10.1103/PhysRevE.109.065104","url":null,"abstract":"A Laval nozzle can accelerate expanding gas above supersonic velocities, while cooling the gas in the process. This work investigates this process for microscopic Laval nozzles by means of nonequilibrium molecular dynamics simulations of stationary flow, using grand-canonical Monte Carlo particle reservoirs. We study the steady-state expansion of a simple fluid, a monoatomic gas interacting via a Lennard-Jones potential, through an idealized nozzle with atomically smooth walls. We obtain the thermodynamic state variables pressure, density, and temperature but also the Knudsen number, speed of sound, velocity, and the corresponding Mach number of the expanding gas for nozzles of different sizes. We find that the temperature is well defined in the sense that the each velocity components of the particles obey the Maxwell-Boltzmann distribution, but it is anisotropic, especially for small nozzles. The velocity autocorrelation function reveals a tendency towards condensation of the cooled supersonic gas, although the nozzles are too small for the formation of clusters. Overall we find that microscopic nozzles act qualitatively like macroscopic nozzles in that the particles are accelerated to supersonic speeds while their thermal motion relative to the stationary flow is cooled. We find that, like macroscopic Laval nozzles, microscopic nozzles also exhibit a sonic horizon, which is well defined on a microscopic scale. The sonic horizon is positioned only slightly further downstream compared to isentropic expansion through macroscopic nozzles, where it is situated in the most narrow part. We analyze the sonic horizon by studying space-time density correlations, i.e., how thermal fluctuations at two positions of the gas density are correlated in time and find that after the sonic horizon there are indeed no upstream correlations on a microscopic scale.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topological defects as nucleation points of the nematic-isotropic phase transition in liquid crystal shells. 拓扑缺陷是液晶壳中向列-各向同性相变的成核点。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.064702

Yucen Han, Jan Lagerwall, Apala Majumdar

{"title":"Topological defects as nucleation points of the nematic-isotropic phase transition in liquid crystal shells.","authors":"Yucen Han, Jan Lagerwall, Apala Majumdar","doi":"10.1103/PhysRevE.109.064702","DOIUrl":"https://doi.org/10.1103/PhysRevE.109.064702","url":null,"abstract":"The transition from a nematic to an isotropic state in a self-closing spherical liquid crystal shell with tangential alignment is a stimulating phenomenon to investigate, as the topology dictates that the shell exhibits local isotropic points at all temperatures in the nematic phase range, in the form of topological defects. The defects may thus be expected to act as nucleation points for the phase transition upon heating beyond the bulk nematic stability range. Here we study this peculiar transition, theoretically and experimentally, for shells with two different configurations of four +1/2 defects, finding that the defects act as the primary nucleation points if they are co-localized in each other's vicinity. If the defects are instead spread out across the shell, they again act as nucleation points, albeit not necessarily the primary ones. Beyond adding to our understanding of how the orientational order-disorder transition can take place in the shell geometry, our results have practical relevance for, e.g., the use of curved liquid crystals in sensing applications or for liquid crystal elastomer actuators in shell shape, undergoing a shape change as a result of the nematic-isotropic transition.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of hybrid quantum eigenstates in systems with mixed classical phase space. 混合经典相空间系统中混合量子特征状态的特征。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.064207

Anant Vijay Varma, Amichay Vardi, Doron Cohen

引用次数: 0

Emergence of order from chaos through a continuous phase transition in a turbulent reactive flow system. 通过湍流反应流系统中的连续相变，从混沌中产生秩序。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.064214

Sivakumar Sudarsanan, Amitesh Roy, Induja Pavithran, Shruti Tandon, R I Sujith

{"title":"Emergence of order from chaos through a continuous phase transition in a turbulent reactive flow system.","authors":"Sivakumar Sudarsanan, Amitesh Roy, Induja Pavithran, Shruti Tandon, R I Sujith","doi":"10.1103/PhysRevE.109.064214","DOIUrl":"https://doi.org/10.1103/PhysRevE.109.064214","url":null,"abstract":"As the Reynolds number is increased, a laminar fluid flow becomes turbulent, and the range of time and length scales associated with the flow increases. Yet, in a turbulent reactive flow system, as we increase the Reynolds number, we observe the emergence of a single dominant timescale in the acoustic pressure fluctuations, as indicated by its loss of multifractality. Such emergence of order from chaos is intriguing. We perform experiments in a turbulent reactive flow system consisting of flame, acoustic, and hydrodynamic subsystems interacting nonlinearly. We study the evolution of short-time correlated dynamics between the acoustic field and the flame in the spatiotemporal domain of the system. The order parameter, defined as the fraction of the correlated dynamics, increases gradually from zero to one. We find that the susceptibility of the order parameter, correlation length, and correlation time diverge at a critical point between chaos and order. Our results show that the observed emergence of order from chaos is a continuous phase transition. Moreover, we provide experimental evidence that the critical exponents characterizing this transition fall in the universality class of directed percolation. Our paper demonstrates how a real-world complex, nonequilibrium turbulent reactive flow system exhibits universal behavior near a critical point.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Irreversibility of stochastic state transitions in Langevin systems with odd elasticity. 具有奇数弹性的朗格文系统中随机状态转换的不可逆性。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-06-01 DOI: 10.1103/PhysRevE.109.064116

Kento Yasuda

引用次数: 0