European Physical Journal-special Topics最新文献_第4页

Applicability and limitations of cluster perturbation theory for Hubbard models 簇摄动理论在哈伯德模型中的适用性和局限性

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-27 DOI: 10.1140/epjs/s11734-023-00976-5

Nicklas Enenkel, Markus Garst, Peter Schmitteckert

{"title":"Applicability and limitations of cluster perturbation theory for Hubbard models","authors":"Nicklas Enenkel, Markus Garst, Peter Schmitteckert","doi":"10.1140/epjs/s11734-023-00976-5","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00976-5","url":null,"abstract":"Abstract We present important use cases and limitations when considering results obtained from cluster perturbation theory (CPT). CPT combines the solutions of small individual clusters of an infinite lattice system with the Bloch theory of conventional band theory to provide an approximation for the Green’s function in the thermodynamic limit. To this end, we are investigating single-band and multi-band Hubbard models in 1D and 2D systems. A special interest is taken in the supposed pseudogap regime of the 2D square lattice at half-filling and intermediate interaction strength ( $$U le 3t$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mi>U</mml:mi> <mml:mo>≤</mml:mo> <mml:mn>3</mml:mn> <mml:mi>t</mml:mi> </mml:mrow> </mml:math> ) as well as the metal–insulator transition. We point out that the finite-size level spacing of the cluster limits the resolution of spectral features within CPT. This restricts the investigation of asymptotic properties of the metal–insulator transition, as it would require much larger cluster sizes that are beyond computational capabilities.","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135535703","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: 1

An improved key expansion algorithm based on a 2D discrete hyper chaotic map with memristor 基于带忆阻器的二维离散超混沌映射的改进密钥展开算法

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-25 DOI: 10.1140/epjs/s11734-023-00993-4

Zhe Lin, Hongjun Liu

引用次数: 0

Stochastic thermodynamics of finite-tape information ratchet 有限带信息棘轮的随机热力学

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-25 DOI: 10.1140/epjs/s11734-023-00994-3

Lock Yue Chew, Andri Pradana, Lianjie He, Jian Wei Cheong

引用次数: 0

Unveiling the spread of epidemics involving partial immunity and reinfection: insights from a time-delayed mathematical model 揭示涉及部分免疫和再感染的流行病的传播:来自时间延迟数学模型的见解

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-22 DOI: 10.1140/epjs/s11734-023-00995-2

B. Krithika, P. Tamilalagan

引用次数: 1

Interferometry of multi-level systems: rate-equation approach for a charge qu$${ d }$$it 多层次系统的干涉测量:电荷qu的速率方程方法$${ d }$$ it

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-21 DOI: 10.1140/epjs/s11734-023-00977-4

M. P. Liul, A. I. Ryzhov, S. N. Shevchenko

引用次数: 1

Classical optical analogue of quantum discord 量子不谐的经典光学模拟

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-18 DOI: 10.1140/epjs/s11734-023-00988-1

Jacob M. Leamer, Wenlei Zhang, Nicholas J. Savino, Ravi K. Saripalli, Sanjaya Lohani, Ryan T. Glasser, Denys I. Bondar

引用次数: 1

Thought experiments in electromagnetic theory and the ordinary Hall effect 电磁理论中的思想实验和普通霍尔效应

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-15 DOI: 10.1140/epjs/s11734-023-00978-3

Jiří J. Mareš, Václav Špička, Pavel Hubík

{"title":"Thought experiments in electromagnetic theory and the ordinary Hall effect","authors":"Jiří J. Mareš, Václav Špička, Pavel Hubík","doi":"10.1140/epjs/s11734-023-00978-3","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00978-3","url":null,"abstract":"Abstract Thought experiments are effective tools of theoretical physics, and historically they have led to the discovery of many useful ideas and relations. Yet they also give rise to paradoxes that persist for long periods of time despite enormous efforts to resolve them. A problem par excellence, one that falls within the realm of classical electrodynamics and has been investigated exclusively by means of thought experiments, is the famous problem of hidden momentum. It concerns the conversion of the electromagnetic momentum generated by static electromagnetic fields into momentum of a non-electromagnetic nature and the resulting momentum balance. As a rule, this effect, which takes place in ponderable systems, is very subtle, of the order of $$sim$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mo>∼</mml:mo> </mml:math> 1/ c 2 ; thus, until now it has only been studied theoretically and has never been demonstrated experimentally. The main subject of this paper is the analysis of a robust and experimentally well-established phenomenon operating in static electromagnetic fields—the ordinary Hall effect—which has been interpreted anew in terms of the Poynting vector and proven to be sufficiently sensitive for direct comparison with typical quantitative estimates encountered in the hidden momentum problem. Confrontation of hypothetical models with a real experiment enables us to formulate the general conditions and rules that should be observed when designing thought experiments in classical electrodynamics.","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135395676","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

A time-fractional of a viscoelastic frictionless contact problem with normal compliance 具有正常柔度的粘弹性无摩擦接触问题的时间分数

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-14 DOI: 10.1140/epjs/s11734-023-00962-x

Mustapha Bouallala, E. L.-Hassan Essoufi, Van Thien Nguyen, Wei Pang

引用次数: 1

Distinguishing between deterministic oscillations and noise 区分确定性振荡和噪声

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-14 DOI: 10.1140/epjs/s11734-023-00986-3

Joe Rowland Adams, Julian Newman, Aneta Stefanovska

{"title":"Distinguishing between deterministic oscillations and noise","authors":"Joe Rowland Adams, Julian Newman, Aneta Stefanovska","doi":"10.1140/epjs/s11734-023-00986-3","DOIUrl":"https://doi.org/10.1140/epjs/s11734-023-00986-3","url":null,"abstract":"Abstract Time-dependent dynamics is ubiquitous in the natural world and beyond. Effectively analysing its presence in data is essential to our ability to understand the systems from which it is recorded. However, the traditional framework for dynamics analysis is in terms of time-independent dynamical systems and long-term statistics, as opposed to the explicit tracking over time of time-localised dynamical behaviour. We review commonly used analysis techniques based on this traditional statistical framework—such as the autocorrelation function, power-spectral density, and multiscale sample entropy—and contrast to an alternative framework in terms of finite-time dynamics of networks of time-dependent cyclic processes. In time-independent systems, the net effect of a large number of individually intractable contributions may be considered as noise; we show that time-dependent oscillator systems with only a small number of contributions may appear noise-like when analysed according to the traditional framework using power-spectral density estimation. However, methods characteristic of the time-dependent finite-time-dynamics framework, such as the wavelet transform and wavelet bispectrum, are able to identify the determinism and provide crucial information about the analysed system. Finally, we compare these two frameworks for three sets of experimental data. We demonstrate that while techniques based on the traditional framework are unable to reliably detect and understand underlying time-dependent dynamics, the alternative framework identifies deterministic oscillations and interactions.","PeriodicalId":12221,"journal":{"name":"European Physical Journal-special Topics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134910504","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

Vacuum representations of blackbody radiation 黑体辐射的真空表示

3区物理与天体物理

European Physical Journal-special Topics Pub Date : 2023-09-14 DOI: 10.1140/epjs/s11734-023-00987-2

Stephen M. Barnett

引用次数: 0