Progress of Theoretical and Experimental Physics最新文献_第7页

Exact solution for rotating black holes in parity-violating gravity 违反奇偶性引力中旋转黑洞的精确解

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-04-08 DOI: 10.1093/ptep/ptae046

Hiroaki W H Tahara, Kazufumi Takahashi, Masato Minamitsuji, Hayato Motohashi

引用次数: 0

A new perspective on thermal transition in QCD QCD 热转变的新视角

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-04-05 DOI: 10.1093/ptep/ptae044

Masanori Hanada, Hiroki Ohata, Hidehiko Shimada, Hiromasa Watanabe

{"title":"A new perspective on thermal transition in QCD","authors":"Masanori Hanada, Hiroki Ohata, Hidehiko Shimada, Hiromasa Watanabe","doi":"10.1093/ptep/ptae044","DOIUrl":"https://doi.org/10.1093/ptep/ptae044","url":null,"abstract":"Motivated by the picture of partial deconfinement developed in recent years for large-N gauge theories, we propose a new way of analyzing and understanding thermal phase transition in QCD. We find nontrivial support for our proposal by analyzing the WHOT-QCD collaboration’s lattice configurations for SU(3) QCD in 3 + 1 spacetime dimensions with up, down, and strange quarks. We find that the Polyakov line (the holonomy matrix around a thermal time circle) is governed by the Haar-random distribution at low temperatures. The deviation from the Haar-random distribution at higher temperatures can be measured via the character expansion, or equivalently, via the expectation values of the Polyakov loop defined by the various nontrivial representations of SU(3). We find that the Polyakov loop corresponding to the fundamental representation and loops in the higher representation condense at different temperatures. This suggests that there are three phases, one intermediate phase existing in between the completely-confined and the completely-deconfined phases. Our identification of the intermediate phase is supported also by the condensation of instantons: by studying the instanton numbers of the WHOT-QCD configurations, we find that the instanton condensation occurs for temperature regimes corresponding to what we identify as the completely-confined and intermediate phases, whereas the instantons do not condense in the completely-deconfined phase. Our characterization of confinement based on the Haar-randomness explains why the Polyakov loop is a good observable to distinguish the confinement and the deconfinement phases in QCD despite the absence of the $mathbb {Z}_3$ center symmetry.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"56 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140598505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 superconducting tensor detector for mid-frequency gravitational waves: its multi-channel nature and main astrophysical targets 中频引力波超导张量探测器：其多通道性质和主要天体物理目标

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-04-01 DOI: 10.1093/ptep/ptae045

Yeong-Bok Bae, Chan Park, Edwin J Son, Sang-Hyeon Ahn, Minjoong Jeong, Gungwon Kang, Chunglee Kim, Dong Lak Kim, Jaewan Kim, Whansun Kim Hyung Mok Lee, Yong-Ho Lee, Ronald S Norton, John J Oh, Sang Hoon Oh, Ho Jung Paik

{"title":"A superconducting tensor detector for mid-frequency gravitational waves: its multi-channel nature and main astrophysical targets","authors":"Yeong-Bok Bae, Chan Park, Edwin J Son, Sang-Hyeon Ahn, Minjoong Jeong, Gungwon Kang, Chunglee Kim, Dong Lak Kim, Jaewan Kim, Whansun Kim Hyung Mok Lee, Yong-Ho Lee, Ronald S Norton, John J Oh, Sang Hoon Oh, Ho Jung Paik","doi":"10.1093/ptep/ptae045","DOIUrl":"https://doi.org/10.1093/ptep/ptae045","url":null,"abstract":"Mid-frequency band gravitational-wave detectors will be complementary for the existing Earth-based detectors (sensitive above 10 Hz or so) and the future space-based detectors such as LISA, which will be sensitive below around 10 mHz. A ground-based superconducting omnidirectional gravitational radiation observatory (SOGRO) has recently been proposed along with several design variations for the frequency band of 0.1 to 10 Hz. For two conceptual designs of SOGRO (e.g., SOGRO and aSOGRO), we examine their multi-channel natures, sensitivities and science cases. One of the key characteristics of the SOGRO concept is its six detection channels. The response functions of each channel are calculated for all possible gravitational wave polarizations including scalar and vector modes. Combining these response functions, we also confirm the omnidirectional nature of SOGRO. Hence, even a single SOGRO detector will be able to determine the position of a source and polarizations of gravitational waves, if detected. Taking into account SOGRO’s sensitivity and technical requirements, two main targets are most plausible: gravitational waves from compact binaries and stochastic backgrounds. Based on assumptions we consider in this work, detection rates for intermediate-mass binary black holes (in the mass range of hundreds up to 105 M⊙) are expected to be 0.0065 − 8.1 yr−1. In order to detect stochastic gravitational wave background, multiple detectors are required. Two aSOGRO detector networks may be able to put limits on the stochastic background beyond the indirect limit from cosmological observations.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140598113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Charged spherical solution in torsion and matter coupling gravity and influence of torsion parameter and electric charge on compact stars in lower mass gap 扭转和物质耦合引力中的带电球面解以及扭转参数和电荷对低质量间隙紧凑恒星的影响

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-27 DOI: 10.1093/ptep/ptae043

S K Maurya, Abdelghani Errehymy, G Mustafa, Orhan Donmez, Kottakkaran Sooppy Nisar, Abdel-Haleem Abdel-Aty

{"title":"Charged spherical solution in torsion and matter coupling gravity and influence of torsion parameter and electric charge on compact stars in lower mass gap","authors":"S K Maurya, Abdelghani Errehymy, G Mustafa, Orhan Donmez, Kottakkaran Sooppy Nisar, Abdel-Haleem Abdel-Aty","doi":"10.1093/ptep/ptae043","DOIUrl":"https://doi.org/10.1093/ptep/ptae043","url":null,"abstract":"In this study, we explore a new exact solution for a charged spherical model as well as the astrophysical implications of the torsion parameter χ1 and electric charge Q on compact stars in lower mass gaps in the $f(mathcal {T})$ gravity framework. Commencing with the field equations that describe anisotropic matter distributions, we select a well-behaved ansatz for the radial component of the metric function, along with an appropriate formulation for the electric field. The resulting model undergoes rigorous testing to ensure its qualification as a physically viable compact object within the $f(mathcal {T})$ gravity background. We extensively investigate two factors: χ1 and Q, carefully analyzing their impacts on the mass, radius, and stability of the star. Our analyses demonstrate that our models exhibit well-behaved behavior, free from singularities, and can successfully explain the existence of a wide range of observed compact objects. These objects have masses ranging from $0.85^{+0.15}_{-0.15}$ to 2.67 M⊙, with the upper value falling within the mass gap regime observed in gravitational events like GW190814. A notable finding of this study has two aspects: we observe significant effects on the maximum mass (Mmax) and the corresponding radii of these objects. Increasing values of χ1 lead to higher Mmax (approximately $2.64^{+0.13}_{-0.14}$) and smaller radii (approximately $10.40^{+0.16}_{-0.60}$), suggesting the possibility of the existence of massive neutron stars (NSs) within the system. Conversely, increasing values of Q result in a decrease in Mmax (approximately $1.70^{+0.05}_{-0.03}$) and larger radii (approximately $13.71^{+0.19}_{-0.20}$). Furthermore, an intriguing observation arises from comparing the results: for all values of χ1, non-rotating stars possess higher masses compared to slow-rotating stars, while this trend is reversed when adjusting Q.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"129 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Large order behavior near the AD point: the case of N = 2 , su(2), Nf = 2 AD 点附近的大阶行为：N = 2 , su(2), Nf = 2 的情况

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-24 DOI: 10.1093/ptep/ptae034

Chuan-Tsung Chan, H Itoyama, R Yoshioka

引用次数: 0

Thermal Larmor radiation 热拉莫尔辐射

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-23 DOI: 10.1093/ptep/ptae042

Evgenii Ievlev, Michael R R Good

引用次数: 0

A lattice formulation of Weyl fermions on a single curved surface 单个弯曲表面上韦尔费米子的晶格模型

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-21 DOI: 10.1093/ptep/ptae041

Shoto Aoki, Hidenori Fukaya, Naoto Kan

引用次数: 0

Remarks on effects of projective phase on eigenstate thermalization hypothesis 关于投影相位对特征状态热化假设的影响的评论

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-13 DOI: 10.1093/ptep/ptae039

Osamu Fukushima

引用次数: 0

Lattice realization of the axial U(1) non-invertible symmetry 轴 U(1) 不可逆对称的晶格实现

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-13 DOI: 10.1093/ptep/ptae040

Yamato Honda, Okuto Morikawa, Soma Onoda, Hiroshi Suzuki

引用次数: 0

Thermodynamic topology of black holes in f(R) gravity f(R) 引力下黑洞的热力学拓扑结构

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-05 DOI: 10.1093/ptep/ptae035

Bidyut Hazarika, Prabwal Phukon

{"title":"Thermodynamic topology of black holes in f(R) gravity","authors":"Bidyut Hazarika, Prabwal Phukon","doi":"10.1093/ptep/ptae035","DOIUrl":"https://doi.org/10.1093/ptep/ptae035","url":null,"abstract":"In this work, we study the thermodynamic topology of a static, a charged static and a charged, rotating black hole in f(R) gravity. For charged static black holes, we work in two different ensembles: fixed charge(q) ensemble and fixed potential(φ) ensemble. For charged, rotating black hole, four different types of ensembles are considered: fixed (q, J), fixed (φ, J), fixed (q, Ω) and fixed (φ, Ω) ensemble, where J and Ω denotes the angular momentum and the angular frequency respectively. Using the generalized off-shell free energy method, where the black holes are treated as topological defects in their thermodynamic spaces, we investigate the local and global topology of these black holes via the computation of winding numbers at these defects. For static black hole we work in three model. We find that the topological charge for a static black hole is always −1 regardless of the values of the thermodynamic parameters and the choice of f(R) model. For a charged static black hole, in the fixed charge ensemble, the topological charge is found to be zero. Contrastingly, in the fixed φ ensemble, the topological charge is found to be −1. For charged static black holes, in both the ensembles, the topological charge is observed to be independent of the thermodynamic parameters. For charged, rotating black hole, in fixed (q, J) ensemble, the topological charge is found to be 1. In (φ, J) ensemble, we find the topological charge to be 1. In case of fixed (q, Ω) ensemble, the topological charge is 1 or 0 depending on the value of the scalar curvature(R). In fixed (Ω, φ) ensemble, the topological charge is −1, 0 or 1 depending on the values of R, Ω and φ. Therefore, we conclude that the thermodynamic topologies of the charged static black hole and charged rotating black hole are influenced by the choice of ensemble. In addition, the thermodynamic topology of the charged rotating black hole also depends on the thermodynamic parameters.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"12 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140054965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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