Progress of Theoretical and Experimental Physics最新文献_第5页

Non-stationary SQM/IST correspondence and CPT/PT-invariant paired hamiltonians on the line 非稳态 SQM/IST 对应和线上 CPT/PT 不变的成对哈密顿子

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-13 DOI: 10.1093/ptep/ptae074

V P Berezovoj, A J Nurmagambetov

引用次数: 0

Towards verifications of Krylov complexity 努力验证克雷洛夫复杂性

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-12 DOI: 10.1093/ptep/ptae073

Ryu Sasaki

{"title":"Towards verifications of Krylov complexity","authors":"Ryu Sasaki","doi":"10.1093/ptep/ptae073","DOIUrl":"https://doi.org/10.1093/ptep/ptae073","url":null,"abstract":"Krylov complexity is considered to provide a measure of the growth of operators evolving under Hamiltonian dynamics. The main strategy is the analysis of the structure of Krylov subspace $mathcal {K}_M(mathcal {H},eta )$ spanned by the multiple applications of the Liouville operator $mathcal {L}$ defined by the commutator in terms of a Hamiltonian $mathcal {H}$, $mathcal {L}:=[mathcal {H},cdot ]$ acting on an operator η, $mathcal {K}_M(mathcal {H},eta )=text{span}lbrace eta ,mathcal {L}eta ,ldots ,mathcal {L}^{M-1}eta rbrace$. For a given inner product ( ·, ·) of the operators, the orthonormal basis $lbrace mathcal {O}_nrbrace$ is constructed from $mathcal {O}_0=eta /sqrt{(eta ,eta )}$ by Lanczos algorithm. The moments $mu _m=(mathcal {O}_0,mathcal {L}^mmathcal {O}_0)$ are closely related to the important data {bn} called Lanczos coefficients. I present the exact and explicit expressions of the moments {μm} for 16 quantum mechanical systems which are exactly solvable both in the Schrödinger and Heisenberg pictures. The operator η is the variable of the eigenpolynomials. Among them six systems show a clear sign of ‘non-complexity’ as vanishing higher Lanczos coefficients bm = 0, m ≥ 3.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"137 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938204","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 self-regulated stochastic acceleration model of pulsar wind nebulae 脉冲星风星云的自调节随机加速模型

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-10 DOI: 10.1093/ptep/ptae069

Shuta J Tanaka, Wataru Ishizaki

{"title":"A self-regulated stochastic acceleration model of pulsar wind nebulae","authors":"Shuta J Tanaka, Wataru Ishizaki","doi":"10.1093/ptep/ptae069","DOIUrl":"https://doi.org/10.1093/ptep/ptae069","url":null,"abstract":"Pulsar wind nebulae (PWNe) are clouds of the magnetized relativistic electron/positron plasma supplied from the central pulsar. However, the number of radio-emitting particles inside a PWN is larger than the expectation from the study of pulsar magnetospheres and then their origin is still unclear. A stochastic acceleration of externally injected particles by a turbulence inside the PWN is proposed by our previous studies. In this paper, the previous stochastic acceleration model of the PWN broadband spectra is improved by taking into account the time evolution of the turbulent energy and then the total energy balance inside a PWN is maintained. The turbulent energy supplied from the central pulsar is wasted by the backreaction from the stochastic particle acceleration and the adiabatic cooling according the PWN expansion. The model is applied to the Crab Nebula and reproduce the current broadband emission spectrum, especially the flat radio spectrum although time evolution of the turbulent energy (diffusion coefficient) is a bit complicated compared with our previous studies, where we assumed an exponential behavior of the diffusion coefficient.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"45 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938124","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

Is the coleman de luccia action minimum?: AdS/CFT approach 科尔曼-德-卢西亚作用是否最小？AdS/CFT 方法

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-10 DOI: 10.1093/ptep/ptae068

Naritaka Oshita, Yutaro Shoji, Masahide Yamaguchi

引用次数: 0

Development of a method to measure trace level of uranium and thorium in scintillation films 开发一种测量闪烁膜中铀和钍痕量水平的方法

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-09 DOI: 10.1093/ptep/ptae071

K Ichimura, K Chiba, Y Gando, H Ikeda, Y Kishimoto, M Kurasawa, K Nemoto, A Sakaguchi, Y Takaku, Y Sakakieda

引用次数: 0

Toward realistic models in T2/ℤ2 flux compactification 在 T2/ℤ2 通量致密化中建立现实模型

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-09 DOI: 10.1093/ptep/ptae070

Hiroki Imai, Nobuhito Maru

引用次数: 0

Theory of majorana zero modes in unconventional superconductors 非常规超导体中的马约拉纳零模理论

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-05-01 DOI: 10.1093/ptep/ptae065

Yukio Tanaka, Shun Tamura, Jorge Cayao

{"title":"Theory of majorana zero modes in unconventional superconductors","authors":"Yukio Tanaka, Shun Tamura, Jorge Cayao","doi":"10.1093/ptep/ptae065","DOIUrl":"https://doi.org/10.1093/ptep/ptae065","url":null,"abstract":"Majorana fermions are spin-1/2 neutral particles that are their own antiparticles and were initially predicted by Ettore Majorana in particle physics but their observation still remains elusive. The concept of Majorana fermions has been borrowed into condensed matter physics, where, unlike particle physics, Majorana fermions emerge as zero-energy quasiparticles that can be engineered by combining electrons and holes and have therefore been coined Majorana zero modes. In this review, we provide a pedagogical explanation of the basic properties of Majorana zero modes in unconventional superconductors and their consequences in experimental observables, putting a special emphasis on the initial theoretical discoveries. In particular, we first show that Majorana zero modes are self-conjugated and emerge as a special type of zero energy surface Andreev bound states at the boundary of unconventional superconductors. We then explore Majorana zero modes in one-dimensional spin-polarized p-wave superconductors, where we address the formation of topological superconductivity and the physical realization in superconductor-semiconductor hybrids. In this part we highlight that Majorana quasiparticles appear as zero-energy edge states, exhibiting charge neutrality, spin-polarized, and spatial nonlocality as unique properties that can be already seen from their energies and wavefunctions. Next, we discuss analytically obtained Green’s functions of p-wave superconductors and demonstrate that the emergence of Majorana zero modes is always accompanied by the formation of odd-frequency spin-triplet pairing as a unique result of the self-conjugate nature of Majorana zero modes. We finally address the signatures of Majorana zero modes in tunneling spectroscopy, including the anomalous proximity effect, and the phase-biased Josephson effect.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"50 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140835541","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

Gauge coupling unification and proton decay via 45 Higgs boson in SU(5) GUT SU(5) GUT 中通过 45 希格斯玻色子实现的量子耦合统一和质子衰变

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-04-27 DOI: 10.1093/ptep/ptae066

Naoyuki Haba, Keisuke Nagano, Yasuhiro Shimizu, Toshifumi Yamada

{"title":"Gauge coupling unification and proton decay via 45 Higgs boson in SU(5) GUT","authors":"Naoyuki Haba, Keisuke Nagano, Yasuhiro Shimizu, Toshifumi Yamada","doi":"10.1093/ptep/ptae066","DOIUrl":"https://doi.org/10.1093/ptep/ptae066","url":null,"abstract":"We study the gauge coupling unification (GCU) and proton decay in a non-supersymmetric SU(5) grand unified theory (GUT) incorporating a 45 representation Higgs field. Our analysis is based on the assumption that Georgi-Jarlskog-type mass matrices for fermions are responsible for explaining the mass ratio of the strange quark and the muon. We examine the conditions of GCU, taking into account the possibility that certain components of the 45 Higgs field have masses much smaller than the GUT scale. We have found that to satisfy the GCU conditions, at least two components of the 45 Higgs field should have such small masses. We search the parameter space to identify regions where the GCU conditions are satisfied, in the scenarios where two or three components of the 45 Higgs boson are hierarchically light. If the colored Higgs component of the 45 Higgs boson has a mass much smaller than the GUT scale, proton decay via colored Higgs boson exchange can occur with an observably large rate. We estimate the mass bounds for the colored Higgs component from the proton decay search at Super-Kamiokande and thereby further restrict the parameter space.","PeriodicalId":20710,"journal":{"name":"Progress of Theoretical and Experimental Physics","volume":"5 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140812155","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

Neutrinos from core-collapse supernova explosions 来自核心坍缩超新星爆炸的中微子

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-04-26 DOI: 10.1093/ptep/ptae056

Hideyuki Suzuki

引用次数: 0

Efficient solver of relativistic hydrodynamics with implicit Runge-Kutta method 采用隐式 Runge-Kutta 方法的相对论流体力学高效求解器

IF 3.5 4区物理与天体物理

Progress of Theoretical and Experimental Physics Pub Date : 2024-04-24 DOI: 10.1093/ptep/ptae058

Nathan Touroux, Masakiyo Kitazawa, Koichi Murase, Marlene Nahrgang

引用次数: 0