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Signed eigenvalue/vector distribution of complex order-three random tensor 复三阶随机张量的带符号特征值/向量分布
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-22 DOI: 10.1093/ptep/ptae062
Naoki Sasakura
{"title":"Signed eigenvalue/vector distribution of complex order-three random tensor","authors":"Naoki Sasakura","doi":"10.1093/ptep/ptae062","DOIUrl":"https://doi.org/10.1093/ptep/ptae062","url":null,"abstract":"We compute the signed distribution of the eigenvalues/vectors of the complex order-three random tensor by computing a partition function of a four-fermi theory, where signs are from a Hessian determinant associated to each eigenvector. The issue of the presence of a continuous degeneracy of the eigenvectors is properly treated by a gauge-fixing. The final expression is compactly represented by a generating function, which has an expansion whose powers are the dimensions of the tensor index spaces. A crosscheck is performed by Monte Carlo simulations. By taking the large-N limit we obtain a critical point where the behavior of the signed distribution qualitatively changes, and also the end of the signed distribution. The expected agreement of the end of the signed distribution with that of the genuine distribution provides a few applications, such as the largest eigenvalue, the geometric measure of entanglement, and the best rank-one approximation in the large-N limit.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"16 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140800326","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
Casimir energy through transfer operators for sine-Gordon backgrounds 正弦-戈登背景下通过转移算子获得的卡西米尔能量
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-18 DOI: 10.1093/ptep/ptae059
Lucía Santamaría-Sanz
{"title":"Casimir energy through transfer operators for sine-Gordon backgrounds","authors":"Lucía Santamaría-Sanz","doi":"10.1093/ptep/ptae059","DOIUrl":"https://doi.org/10.1093/ptep/ptae059","url":null,"abstract":"The quantum vacuum interaction energy between a pair of semitransparent two-dimensional plates represented by Dirac delta potentials and its first derivative, embedded in the topological background of a sine-Gordon kink, is studied through an extension of the TGTG-formula (developped by O. Kenneth and I. Klich in the scattering approach). Quantum vacuum oscillations around the sine-Gordon kink solutions are interpreted as a quantum scalar field theory in the spacetime of a domain wall. Moreover, the relation between the phase shift and the density of states (the well-known Dashen-Hasslacher-Neveu formula) is also exploited to characterize the quantum vacuum energy.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"31 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140626713","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
Importance of strange sea to the charge radii and quadrupole moment of JP = 1/2+, 3/2+ baryons 奇异海对 JP = 1/2+, 3/2+ 重子的电荷半径和四极矩的重要性
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-18 DOI: 10.1093/ptep/ptae060
Preeti Bhall, A Upadhyay
{"title":"Importance of strange sea to the charge radii and quadrupole moment of JP = 1/2+, 3/2+ baryons","authors":"Preeti Bhall, A Upadhyay","doi":"10.1093/ptep/ptae060","DOIUrl":"https://doi.org/10.1093/ptep/ptae060","url":null,"abstract":"A statistical framework in conjugation with the principle of detailed balance is employed to examine the low-energy properties i.e. charge radii and quadrupole moment of JP=$frac{1}{2}^+$ octet and JP=$frac{3}{2}^+$ decuplet baryons. The statistical model relies on the assumption that the baryons can be expanded in terms of quark-gluon Fock states. We systematically apply operator formalism along with the statistical approach to study the charge radii and quadrupole moment of baryons. Based on the probabilities of all possible Fock states in spin, flavor and color space, the importance of sea with quarks and gluons is studied. The individual contribution of the constituent quarks and sea (scalar, vector and tensor sea) is explored. Due to large mass difference between strange and non-strange content, the SU(3) breaking effect are also investigated. The extent to which strange $qbar{q}$ pairs is considered in sea is constrained by the mass of hadrons and the free energy of gluons, in accordance with experimental evidence. We focus on the individual contribution of strange and non-strange sea ($g, langle ubar{u}rangle$, $langle dbar{d}rangle$ and $langle sbar{s}rangle$) accomodability in the respective hadrons for their charge radii and quadrupole moment. The present work has been compared with various theoretical approaches and some known experimental observations. The obtained results may give valuable information for upcoming experimental findings.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"50 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140626605","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
On magnitudes of some CKM matrix elements 关于一些 CKM 矩阵元素的大小
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-12 DOI: 10.1093/ptep/ptae057
Zoltan Ligeti
{"title":"On magnitudes of some CKM matrix elements","authors":"Zoltan Ligeti","doi":"10.1093/ptep/ptae057","DOIUrl":"https://doi.org/10.1093/ptep/ptae057","url":null,"abstract":"This writeup follows the presentation at the Symposium, with emphasis on topics and ideas discussed there. It is purposefully informal, not a review of the field, and neither does it include a complete list of references. However, I hope that readers might find some comments useful or amusing, and may appreciate the challenges and reasons for excitement about recent progress and future opportunities in flavor physics.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"84 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562482","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
Anti-Instability of Complex Ghost 复杂幽灵的反不稳定性
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-10 DOI: 10.1093/ptep/ptae053
Jisuke Kubo, Taichiro Kugo
{"title":"Anti-Instability of Complex Ghost","authors":"Jisuke Kubo, Taichiro Kugo","doi":"10.1093/ptep/ptae053","DOIUrl":"https://doi.org/10.1093/ptep/ptae053","url":null,"abstract":"We argue that Lee-Wick’s complex ghost appearing in any higher derivative theory is stable and its asymptotic field exists. It may be more appropriate to call it “anti-unstable” in the sense that, the more the ghost ‘decays’ into lighter ordinary particles, the larger the probability the ghost remains as itself becomes. This is explicitly shown by analyzing the two-point functions of the ghost Heisenberg field which is obtained as an exact result in the N → ∞ limit in a massive scalar ghost theory with light O(N)-vector scalar matter. The anti-instability is a consequence of the fact that the poles of the complex ghost propagator are located on the physical sheet in the complex plane of four-momentum squared. This should be contrasted to the case of the ordinary unstable particle, whose propagator has no pole on the physical sheet.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"182 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562374","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
Performance of new Kuraray wavelength-shifting fibers with short decay time 具有短衰减时间的新型可乐丽波长变换光纤的性能
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-10 DOI: 10.1093/ptep/ptae055
Shoma Kodama, Hokuto Kobayashi, Wataru Okinaga, Kota Nakagiri, Yasuhiro Nakajima, Masashi Yokoyama
{"title":"Performance of new Kuraray wavelength-shifting fibers with short decay time","authors":"Shoma Kodama, Hokuto Kobayashi, Wataru Okinaga, Kota Nakagiri, Yasuhiro Nakajima, Masashi Yokoyama","doi":"10.1093/ptep/ptae055","DOIUrl":"https://doi.org/10.1093/ptep/ptae055","url":null,"abstract":"We measure the decay time and the attenuation length of newly developed wavelength-shifting fibers, YS series from Kuraray, which have fast response. Using a 405 nm laser, the decay times of the YS-2, 4, and 6 are measured to be 3.64 ± 0.04 ns, 2.15 ± 0.03 ns, and 1.47 ± 0.02 ns, respectively, for the light injection distance of 10 cm. The decay time of Y-11 is measured to be 7.10 ± 0.09 ns using the same system. All fibers are found to have similar attenuation lengths of more than 4 meters. When combined with the plastic scintillators EJ-200 and EJ-204, the YS series have better time resolution than Y-11, with light yields of 60–100% of Y-11.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"32 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562483","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
Jacobi–Lie Models and Supergravity Equations 雅各比-李模型和超引力方程
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-10 DOI: 10.1093/ptep/ptae054
Ladislav Hlavatý, Ivo Petr
{"title":"Jacobi–Lie Models and Supergravity Equations","authors":"Ladislav Hlavatý, Ivo Petr","doi":"10.1093/ptep/ptae054","DOIUrl":"https://doi.org/10.1093/ptep/ptae054","url":null,"abstract":"Poisson–Lie T-duality/plurality was recently generalized to Jacobi–Lie T-plurality formulated in terms of Double Field Theory and based on Leibniz algebras given by structure coefficients fabc, fcab, and Za, Za. We investigate three- and four-dimensional sigma models corresponding to six-dimensional Leibniz algebras with fbba ≠ 0, Za = 0. We show that these algebras are plural one to another and, moreover, to an algebra with fbba = 0, Za = 0. These pluralities are used for construction of Jacobi–Lie models. It was conjectured that plural models should satisfy Generalized Supergravity Equations. We have found examples of models satisfy Generalized Supergravity Equations where no trivialization to usual Supergravity Equations is possible. On the other hand, we show that there are also models corresponding to algebras with fbba ≠ 0, Za = 0 where the Killing vector appearing in Generalized Supergravity Equations either vanishes or can be removed by suitable gauge transformation. Such models then satisfy usual Supergravity Equations, i.e. vanishing beta function equations.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"57 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140562469","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
Simplified algorithm for the Worldvolume HMC and the Generalized-thimble HMC 世界卷 HMC 和广义顶针 HMC 的简化算法
IF 3.5 4区 物理与天体物理
Progress of Theoretical and Experimental Physics Pub Date : 2024-04-09 DOI: 10.1093/ptep/ptae051
Masafumi Fukuma
{"title":"Simplified algorithm for the Worldvolume HMC and the Generalized-thimble HMC","authors":"Masafumi Fukuma","doi":"10.1093/ptep/ptae051","DOIUrl":"https://doi.org/10.1093/ptep/ptae051","url":null,"abstract":"The Worldvolume Hybrid Monte Carlo method (WV-HMC method) [arXiv:2012.08468] is a reliable and versatile algorithm towards solving the sign problem. Similarly to the tempered Lefschetz thimble method, this method removes the ergodicity problem inherent in algorithms based on Lefschetz thimbles. In addition to this advantage, the WV-HMC method significantly reduces the computational cost because one needs not compute the Jacobian of deformation in generating configurations. A crucial step in this method is the RATTLE algorithm, where the Newton method is used at each molecular dynamics step to project a transported configuration onto a submanifold (worldvolume) in the complex space. In this paper, we simplify the RATTLE algorithm by employing a simplified Newton method (the fixed-point method) along with iterative solvers for orthogonal decompositions of vectors, and show that this algorithm further reduces the computational cost. We also apply this algorithm to the HMC algorithm for the generalized thimble method (GT-HMC method). We perform a numerical test for the convergence of the simplified RATTLE algorithm, and show that the convergence depends on the system size only weakly. The application of this simplified algorithm to various models will be reported in subsequent papers.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"56 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140597977","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
K + N elastic scatterings for estimation of in-medium quark condensate with strange quarks 用于估算带有奇异夸克的中间夸克凝聚态的 K + N 弹性散射
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/ptae050
Yutaro Iizawa, Daisuke Jido, Stephan Hübsch
{"title":"K + N elastic scatterings for estimation of in-medium quark condensate with strange quarks","authors":"Yutaro Iizawa, Daisuke Jido, Stephan Hübsch","doi":"10.1093/ptep/ptae050","DOIUrl":"https://doi.org/10.1093/ptep/ptae050","url":null,"abstract":"We revisit the low-energy K+N elastic scatterings in the context of the in-medium quark condensate with strange quarks. The chiral ward identity connects the in-medium quark condensate to the soft limit value of the pseudoscalar correlation function evaluated in nuclear matter. The in-medium correlation function of the psuedoscalar fields with strangeness describes in-medium kaon propagation and is obtained by kaon-nucleon scattering amplitudes in the low density approximation. We construct the kaon-nucleon scattering amplitudes in chiral perturbation theory up to the next-to-leading order and add some terms of the next-to-next-to-leading order with the strange quark mass to improve expansion of the strange quark sector. We also consider the effect of a possible broad resonance state around Plab = 600 MeV/c for I = 0 reported in the previous study. The low energy constants are determined by existent K+N scattering data. We obtain good reproduction of the K+p scattering amplitude by chiral perturbation theory, while the description of the KN amplitude with I = 0 is not so satisfactory due to the lack of low energy data. Performing analytic continuation of the scattering amplitudes obtained by chiral perturbation theory to the soft limit, we estimate the in-medium strange quark condensate.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"6 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140597957","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
Pauli-Villars regularization of Kaluza-Klein Casimir energy with Lorentz symmetry 具有洛伦兹对称性的卡卢扎-克莱因卡西米尔能的保利-维拉尔正则化
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/ptae048
Hiroki Matsui, Yutaka Sakamura
{"title":"Pauli-Villars regularization of Kaluza-Klein Casimir energy with Lorentz symmetry","authors":"Hiroki Matsui, Yutaka Sakamura","doi":"10.1093/ptep/ptae048","DOIUrl":"https://doi.org/10.1093/ptep/ptae048","url":null,"abstract":"The Pauli-Villars regularization is appropriate to discuss the UV sensitivity of low-energy observables because it mimics how the contributions of new particles at high energies cancel large quantum corrections from the light particles in the effective field theory. We discuss the UV sensitivity of the Casimir energy density and pressure in an extra-dimensional model in this regularization scheme, and clarify the condition on the regulator fields to preserve the Lorentz symmetry of the vacuum state. Some of the conditions are automatically satisfied in spontaneously-broken supersymmetric models, but supersymmetry is not enough to ensure the Lorentz symmetry. We show that the necessary regulators can be introduced as bulk fields. We also evaluate the Casimir energy density with such regulators, and its deviation from the result obtained in the analytic regularization.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"11 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140597961","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
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