Physical Review A最新文献_第3页

Modeling beam propagation in a moving nonlinear medium 移动非线性介质中的光束传播建模

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-11 DOI: 10.1103/physreva.110.033515

Ryan Hogan, Giulia Marcucci, Akbar Safari, A. Nicholas Black, Boris Braverman, Jeremy Upham, Robert W. Boyd

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Improving on-demand single-photon-source coherence and indistinguishability through a time-delayed coherent feedback 通过延时相干反馈改善按需单光子源相干性和不可分辨性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.l031703

Gavin Crowder, Lora Ramunno, Stephen Hughes

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Transition frequencies, isotope shifts, and hyperfine structure in 4s→4p transitions of stable Ti+ ions 稳定 Ti+ 离子 4s→4p 转变中的转变频率、同位素偏移和超精细结构

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.032807

Tim Ratajczyk, Kristian König, Philipp Bollinger, Tim Lellinger, Victor Varentsov, Wilfried Nörtershäuser, Julien Spahn

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Motional Stark effect on bound-free spectra 无边界光谱上的运动斯塔克效应

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.032808

Thomas A. Gomez, Mark C. Zammit, Christopher J. Fontes, Igor Bray, Jackson White

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Geometric phase of a two-level atom near a dielectric nanosphere out of thermal equilibrium 介电纳米圈附近脱离热平衡的两级原子的几何相位

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.033710

Ehsan Amooghorban, Sareh Shahidani, Somaye Mohamadi Abdhvand

{"title":"Geometric phase of a two-level atom near a dielectric nanosphere out of thermal equilibrium","authors":"Ehsan Amooghorban, Sareh Shahidani, Somaye Mohamadi Abdhvand","doi":"10.1103/physreva.110.033710","DOIUrl":"https://doi.org/10.1103/physreva.110.033710","url":null,"abstract":"We study the geometric phase (GP) of a two-level atom coupled to an environment composed of free space and a dielectric nanosphere in thermal and out of thermal equilibrium. We analytically and numerically analyze the optical properties and loss of the dielectric medium, along with the nonequilibrium effects of the environment on the GP. In the weak coupling limit, we find that the correction to the GP depends on the partial local density of photonic states at the atom position, and an effective parameter that emerges out of the nonequilibrium configuration of the system. The GP exhibits a significant enhancement due to the excitation of evanescent surface waves at its resonance frequency. It is shown that the GP acquired by the atomic system out of thermal equilibrium is always bounded between the thermal-equilibrium counterparts. Furthermore, the temperature difference between the nanosphere and free space can play an important role in the GP only at moderate atomic distances from the nanosphere. Our results elegantly demonstrate properties of the GP near material media that can support phononic modes and pave the way for further research of GP as a resource for quantum computation.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

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Simple quantum algorithm to efficiently prepare sparse states 高效制备稀疏状态的简单量子算法

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.032609

Debora Ramacciotti, Andreea I. Lefterovici, Antonio F. Rotundo

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Double electron capture in O6++He collisions O6++He 碰撞中的双电子俘获

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.032806

M. X. Ma, T. Meng, B. Tu, P. Ma, Y. W. Zhang, L. Liu, J. Xiao, K. Yao, Y. Zou, Y. Wu, J. G. Wang, B. Wei

{"title":"Double electron capture in O6++He collisions","authors":"M. X. Ma, T. Meng, B. Tu, P. Ma, Y. W. Zhang, L. Liu, J. Xiao, K. Yao, Y. Zou, Y. Wu, J. G. Wang, B. Wei","doi":"10.1103/physreva.110.032806","DOIUrl":"https://doi.org/10.1103/physreva.110.032806","url":null,"abstract":"As one kind of ubiquitous collision system, <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msup><mrow><mi mathvariant=\"normal\">O</mi></mrow><mrow><mn>6</mn><mo>+</mo></mrow></msup><mo>+</mo><mi>He</mi></mrow></math> deserves attentive study due to its theoretical significance in fundamental physics and applied value in fields like astrophysics or plasma physics. Specifically, in the case of the electron capture process, while a considerable number of measurements and calculations have focused on single electron capture, research is still inadequate on the double electron capture which contributes nearly 10% to the overall electron capture. In this work, a two-active-electron semiclassical asymptotic-state close-coupling method is used to calculate the total and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>l</mi><mo>−</mo><mi>resolved</mi></mrow></math> state-selective double electron capture cross sections of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msup><mrow><mi mathvariant=\"normal\">O</mi></mrow><mrow><mn>6</mn><mo>+</mo></mrow></msup><mo>+</mo><mi>He</mi></mrow></math> collisions in the energy range 0.5–100 keV/u, accompanied by experimental measurements in the energy range 2.63–37.5 keV/u with an uncertainty of 16%, in good consistency. These theoretical and experimental data can fill gaps in the database of double electron capture in <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msup><mrow><mi mathvariant=\"normal\">O</mi></mrow><mrow><mn>6</mn><mo>+</mo></mrow></msup><mo>+</mo><mi>He</mi></mrow></math> collisions and provide insights for improving theoretical models in further research.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Lattice-induced wave-function effects on trapped superfluids 陷落超流体的晶格诱导波函数效应

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.033310

Yeyang Zhang

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Spin-noise-induced synchronization between non-overlapping laser beams 非重叠激光束之间的自旋噪声诱导同步

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.033105

Shiming Song, Min Jiang, Yushu Qin, Ze Wu, Haowen Su, Ren-bao Liu, Dieter Suter, Xinhua Peng

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Geometric quantum discord of an arbitrary two-qudit state: Exact value and general upper bounds 任意双量子态的几何量子不和谐：精确值和一般上限

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-10 DOI: 10.1103/physreva.110.032410

Elena R. Loubenets, Louis Hanotel

{"title":"Geometric quantum discord of an arbitrary two-qudit state: Exact value and general upper bounds","authors":"Elena R. Loubenets, Louis Hanotel","doi":"10.1103/physreva.110.032410","DOIUrl":"https://doi.org/10.1103/physreva.110.032410","url":null,"abstract":"The geometric quantum discord of a two-qudit state has been studied in many papers; however, its exact analytical value in the explicit form is known only for a general two-qubit state, a general qubit-qudit state, and some special families of two-qudit states. Based on the general Bloch vectors formalism [E. R. Loubenets et al., J. Phys. A: Math. Theor. 54, 195301 (2021)], we find the explicit exact analytical value of the geometric quantum discord for an arbitrary two-qudit state of any dimension via the parameters of its correlation matrix and the Bloch vectors of its reduced states. This general analytical result includes all the known exact results on the geometric quantum discord only as particular cases and proves rigorously that the lower bound on the geometric discord presented in [S. Rana et al., Phys. Rev. A 85, 024102 (2012)] constitutes its exact value for each two-qudit state. Moreover, our general result allows us to find for an arbitrary two-qudit state, pure or mixed, the upper and lower bounds on its geometric quantum discord, expressed via the Hilbert space characteristics of this state.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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