Progress of Theoretical and Experimental Physics最新文献_第9页

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

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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

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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":null,"pages":null},"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

Convergence of Ginzburg-Landau expansions: superconductivity in the BCS theory and chiral symmetry breaking in the NJL model 金兹堡-朗道展开的收敛性：BCS 理论中的超导性和 NJL 模型中的手性对称破缺

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-02 DOI: 10.1093/ptep/ptae032

William Gyory, Naoki Yamamoto

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Decays of standard model like higgs boson h → γγ, Zγ in a minimal left-right symmetric model 极小左右对称模型中类似标准模型希格斯玻色子 h → γγ, Zγ 的衰变

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-02 DOI: 10.1093/ptep/ptae029

T T Hong, V K Le, L T T Phuong, N C Hoi, N T K Ngan, N H T Nha

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Matrix regularization for gauge theories 规整理论的矩阵正则化

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-02 DOI: 10.1093/ptep/ptae031

Hiroyuki Adachi, Goro Ishiki, Satoshi Kanno

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On thermal transition in QCD 关于 QCD 中的热转变

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-03-01 DOI: 10.1093/ptep/ptae033

Masanori Hanada, Hiromasa Watanabe

{"title":"On thermal transition in QCD","authors":"Masanori Hanada, Hiromasa Watanabe","doi":"10.1093/ptep/ptae033","DOIUrl":"https://doi.org/10.1093/ptep/ptae033","url":null,"abstract":"We describe how the general mechanism of partial deconfinement applies to large-N QCD and the partially-deconfined phase inevitably appears between completely-confined and completely-deconfined phases. Furthermore, we propose how the partial deconfinement can be observed in the real-world QCD with the SU(3) gauge group. For this purpose, we employ lattice configurations obtained by the WHOT-QCD collaboration and examine our proposal numerically. In the discussion, the Polyakov loop plays a crucial role in characterizing the phases, without relying on center symmetry, and hence, we clarify the meaning of the Polyakov loop in QCD at large N and finite N. Both at large N and finite N, the complete confinement is characterized by the Haar-random distribution of the Polyakov line phases. Haar-randomness, which is stronger than unbroken center symmetry, indicates that Polyakov loops in any nontrivial representations have vanishing expectation values, and deviation from the Haar-random distribution at higher temperatures is quantified with the loops. We discuss that the transitions separating the partially-deconfined phase are characterized by the behaviors of Polyakov loops in various representations. The lattice QCD data provide us with the signals exhibiting two different characteristic temperatures: deconfinement of the fundamental representation and deconfinement of higher representations. As a nontrivial test for our proposal, we also investigate the relation between partial deconfinement and instanton condensation and confirm the consistency with the lattice data. To make the presentation more easily accessible, we provide a detailed review of the previously known aspects of partial deconfinement.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003776","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

Theory of CP angles measurements CP 角测量理论

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-02-25 DOI: 10.1093/ptep/ptae028

Amarjit Soni

引用次数: 0

Nambu-bracket for three-dimensional ideal fluid dynamics and magnetohydrodynamics 用于三维理想流体动力学和磁流体动力学的 Nambu 支架

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-02-17 DOI: 10.1093/ptep/ptae025

Yasuhide Fukumoto, Rong Zou

{"title":"Nambu-bracket for three-dimensional ideal fluid dynamics and magnetohydrodynamics","authors":"Yasuhide Fukumoto, Rong Zou","doi":"10.1093/ptep/ptae025","DOIUrl":"https://doi.org/10.1093/ptep/ptae025","url":null,"abstract":"The ideal magnetohydrodynamics (MHD) as well as the ideal fluid dynamics is governed by the Hamilton equation with respect to the Lie-Poisson bracket. The Nambu bracket manifestly represents the Lie-Poisson structure in terms of derivative of the Casimir invariants. We construct a compact Nambu-bracket representation for the three-dimensional ideal MHD equations, with use of three Casimirs for the second Hamiltonians, the total entropy and the magnetic and cross helicities, whose coefficients are all constant. The Lie-Poisson bracket induced by this Nambu bracket does not coincide with the original one, but supplemented by terms with an auxiliary variable. The supplemented Lie-Poisson bracket qualifies the cross-helicity as the Casimir. By appealing to Noether’s theorem, we show that the cross-helicity is the integral invariant associated with the particle-relabeling symmetry. Employing the Lagrange label function, as the independent variable in the variational framework, facilitates implementation of the relabeling transformation. By incorporating the divergence symmetry, other known topological invariants are put on the same ground of Noether’s theorem.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139903302","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

First Study of the PIKACHU Project: Development and Evaluation of High-Purity Gd3Ga3Al2O12:Ce Crystals for 160Gd Double Beta Decay Search PIKACHU 项目的首次研究：开发和评估用于 160Gd 双β衰变搜索的高纯度 Gd3Ga3Al2O12:Ce 晶体

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-02-17 DOI: 10.1093/ptep/ptae026

Takumi Omori, Takashi Iida, Azusa Gando, Keishi Hosokawa, Kei Kamada, Keita Mizukoshi, Yasuhiro Shoji, Masao Yoshino, Ken-Ichi Fushimi, Hisanori Suzuki, Kotaro Takahashi

{"title":"First Study of the PIKACHU Project: Development and Evaluation of High-Purity Gd3Ga3Al2O12:Ce Crystals for 160Gd Double Beta Decay Search","authors":"Takumi Omori, Takashi Iida, Azusa Gando, Keishi Hosokawa, Kei Kamada, Keita Mizukoshi, Yasuhiro Shoji, Masao Yoshino, Ken-Ichi Fushimi, Hisanori Suzuki, Kotaro Takahashi","doi":"10.1093/ptep/ptae026","DOIUrl":"https://doi.org/10.1093/ptep/ptae026","url":null,"abstract":"Uncovering neutrinoless double beta decay (0ν2β) is crucial for confirming neutrinos’ Majorana characteristics. The decay rate of 0νββ is theoretically uncertain, influenced by nuclear matrix elements that vary across nuclides. To reduce this uncertainty, precise measurement of the half-life of neutrino-emitting double beta decay (2ν2β) in different nuclides is essential. We have launched the PIKACHU (Pure Inorganic scintillator experiment in KAmioka for CHallenging Underground sciences) project to fabricate high-purity Ce-doped Gd3Ga3Al2O12 (GAGG) single crystals and use them to study the double beta decay of 160Gd. Predictions from two theoretical models on nuclear matrix element calculations for 2ν2β in 160Gd show a significant discrepancy in estimated half-lives, differing by approximately an order of magnitude. If the lower half-life estimation holds true, detecting 2ν2β in 160Gd could be achievable with a sensitivity enhancement slightly more than an order of magnitude compared to prior investigations using Ce-doped Gd2SiO5 (GSO) crystal. We have successfully developed GAGG crystals with purity levels surpassing previous standards through refined purification and selection of raw materials. Our experiments with these crystals indicate the feasibility of reaching sensitivities exceeding those of earlier studies. This paper discusses the ongoing development and scintillator performance evaluation of High-purity GAGG crystals, along with the anticipated future prospects of the PIKACHU experiment.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139903378","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