Physical Review A最新文献_第5页

Direct measurement of isotope shifts in the barium 6s2 S01–5d6p D1o3 transition 直接测量钡 6s2 S01-5d6p D1o3 转变中的同位素偏移

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.032812

Jungwoo Choi, Eunhwi Lee, Dahyun Yum, Kyungwon An, Junki Kim

{"title":"Direct measurement of isotope shifts in the barium 6s2 S01–5d6p D1o3 transition","authors":"Jungwoo Choi, Eunhwi Lee, Dahyun Yum, Kyungwon An, Junki Kim","doi":"10.1103/physreva.110.032812","DOIUrl":"https://doi.org/10.1103/physreva.110.032812","url":null,"abstract":"We report the direct measurement of isotope shifts of the barium <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>6</mn><msup><mrow><mi>s</mi></mrow><mn>2</mn></msup></mrow></math> <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mmultiscripts><mi>S</mi><mn>0</mn><none></none><mprescripts></mprescripts><none></none><mn>1</mn></mmultiscripts><mtext>–</mtext><mn>5</mn><mi>d</mi><mn>6</mn><mi>p</mi><mmultiscripts><mi>D</mi><mn>1</mn><mi mathvariant=\"normal\">o</mi><mprescripts></mprescripts><none></none><mn>3</mn></mmultiscripts></mrow></math> 413-nm electric quadrupole transition, which is utilized for efficient barium ion trapping via photoionization using a single coherent light source. The measured isotope shifts relative to <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Ba</mi><mprescripts></mprescripts><none></none><mn>138</mn></mmultiscripts></math> are <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>392.9</mn><mo>±</mo><mn>0.9</mn><mspace width=\"0.16em\"></mspace><mi>MHz</mi></mrow></math>, <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>178.1</mn><mo>±</mo><mn>0.8</mn><mspace width=\"0.16em\"></mspace><mi>MHz</mi></mrow></math>, <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>401.4</mn><mo>±</mo><mn>1.2</mn><mspace width=\"0.16em\"></mspace><mi>MHz</mi></mrow></math>, and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>124.3</mn><mo>±</mo><mn>1.3</mn><mspace width=\"0.16em\"></mspace><mi>MHz</mi></mrow></math> for isotopes with atomic numbers 137, 136, 135, and 134, respectively. We verify the measured isotopes with King plot analysis and compare the result with the formerly known shifts inferred from previous studies on neighboring transitions. The results can be used for efficient isotope selective loading of low-abundant barium ions, while careful suppression of line broadening is required for successful isotopic selectivity.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"20 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262770","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

Exceptional points in perturbed dielectric spheres: A resonant-state expansion study 扰动介质球中的异常点：共振态扩展研究

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.033518

K. S. Netherwood, H. K. Riley, E. A. Muljarov

{"title":"Exceptional points in perturbed dielectric spheres: A resonant-state expansion study","authors":"K. S. Netherwood, H. K. Riley, E. A. Muljarov","doi":"10.1103/physreva.110.033518","DOIUrl":"https://doi.org/10.1103/physreva.110.033518","url":null,"abstract":"Exceptional points (EPs) in open optical systems are rigorously studied using the resonant-state expansion (RSE). A spherical resonator, specifically a homogeneous dielectric sphere in a vacuum, perturbed by two pointlike defects which break the spherical symmetry and bring the optical modes to EPs, is used as a worked example. The RSE is a nonperturbative approach encoding the information about an open optical system in matrix form in a rigorous way, and thus offering a suitable tool for studying its EPs. These are simultaneous degeneracies of the eigenvalues and corresponding eigenfunctions of the system, which are rigorously described by the RSE and illustrated for perturbed whispering-gallery modes (WGMs). An exceptional arc, which is a line of adjacent EPs, is obtained analytically for perturbed dipolar WGMs. Perturbation of high-quality WGMs with large angular momentum and their EPs are found by reducing the RSE equation to a two-state problem by means of an orthogonal transformation of a large RSE matrix. WGM pairs have opposite chirality in spherically symmetric systems and equal chirality at EPs. This chirality at EPs can be observed in circular dichroism measurements, as it manifested itself in a squared-Lorentzian part of the optical spectra, which we demonstrate here analytically and numerically in the Purcell enhancement factor for the perturbed dipolar WGMs.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"27 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262927","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

Quantum violations of joint reality 量子违反联合现实

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.032214

R. A. Caetano, R. M. Angelo

引用次数: 0

Cooperative atomic emission from a line of atoms interacting with a resonant plane surface 与共振平面表面相互作用的原子线的协同原子发射

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.032813

M. O. Araújo, J. C. de Aquino Carvalho, Ph. W. Courteille, A. Laliotis

{"title":"Cooperative atomic emission from a line of atoms interacting with a resonant plane surface","authors":"M. O. Araújo, J. C. de Aquino Carvalho, Ph. W. Courteille, A. Laliotis","doi":"10.1103/physreva.110.032813","DOIUrl":"https://doi.org/10.1103/physreva.110.032813","url":null,"abstract":"Cooperative effects such as super- and subradiance can be observed in the fluorescence emitted by a system of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>N</mi></math> atoms in vacuum after interaction with a laser beam. In the vicinity of a dielectric or metallic surface, Casimir-Polder effects can modify collective atomic frequency shifts and decay rates. In this work, we study cooperative fluorescent emission next to resonant surfaces using the coupled-dipole model. We show that cooperative effects, expected in free space, are absent when the atoms are close to a surface whose polariton resonances coincide with the dominant atomic dipole coupling. In this case, cooperative effects are overshadowed by the very fast decay of the atomic fluorescence into surface modes. We illustrate our formalism and our results by considering a line of cesium <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>6</mn><msub><mi>D</mi><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math> atoms in front of a sapphire surface. Finally, we propose the study of cesium <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>6</mn><msub><mi>P</mi><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math> atoms in front of a resonant metasurface as the most promising scenario for experimentally demonstrating the results of our study.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"118 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262926","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

Improving the performance of digitized counterdiabatic quantum optimization via algorithm-oriented qubit mapping 通过面向算法的量子比特映射提高数字化逆绝热量子优化的性能

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.032421

Yanjun Ji, Kathrin F. Koenig, Ilia Polian

引用次数: 0

Performance advantage of protective quantum measurements 保护性量子测量的性能优势

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.032215

Maximilian Schlosshauer

引用次数: 0

Quantifying genuine tripartite entanglement by reshaping the state 通过重塑状态量化真正的三方纠缠

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.032420

Dong-Dong Dong, Li-Juan Li, Xue-Ke Song, Liu Ye, Dong Wang

引用次数: 0

Temperature dependence of optical phase transitions in a system of two-level atoms and photons interacting inside a nonlinear cavity 在非线性腔内相互作用的两级原子和光子系统中光学相变的温度依赖性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.033714

S. Samimi, M. M. Golshan

{"title":"Temperature dependence of optical phase transitions in a system of two-level atoms and photons interacting inside a nonlinear cavity","authors":"S. Samimi, M. M. Golshan","doi":"10.1103/physreva.110.033714","DOIUrl":"https://doi.org/10.1103/physreva.110.033714","url":null,"abstract":"In the present work, the role of temperature in the occurrence of optical phases in a system of a large number of atoms interacting with photons is reported. To this end, it is assumed that the cavity inside which the constituents interact is in equilibrium with a heat reservoir, held at a <i>fixed temperature</i>. To achieve this goal, we start with the conventional density operator to calculate the mean values of electromagnetic quadratures. To make the realization of three distinct optical phases, trivial, electric, and magnetic superradiance, possible, the medium inside the cavity is assumed to be a second-order nonlinear one. The nonlinearity of the medium is further assumed to be activated by an externally applied classical pump field. As a consequence, now there are <i>two</i> external controlling agents, the temperature and nonlinearity strength. We then proceed to calculate the quadrature mean values in the thermodynamical limit and for a large number of atoms as a function of temperature. An analysis of the calculated mean values, along with relevant figures, reveals temperature-dependent conditions for realizing trivial, electric, and magnetic optical phases. Moreover, we shall demonstrate that the atom-field coupling strength gives rise to two distinct regimes where the optical phases behave quite differently. In one of the two regimes it is possible for the phases to coexist, while in the other it is not. As a profound result, it is demonstrated that for such a system there can exist a unique temperature (triple point) at which the three optical phases coexist.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"32 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262928","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

Surface criticality in the mixed-field Ising model with sign-inverted next-nearest-neighbor interaction 具有符号反转近邻相互作用的混合场伊辛模型的表面临界性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-17 DOI: 10.1103/physreva.110.033319

Yuki Nakamura, Ryui Kaneko, Ippei Danshita

{"title":"Surface criticality in the mixed-field Ising model with sign-inverted next-nearest-neighbor interaction","authors":"Yuki Nakamura, Ryui Kaneko, Ippei Danshita","doi":"10.1103/physreva.110.033319","DOIUrl":"https://doi.org/10.1103/physreva.110.033319","url":null,"abstract":"Rydberg atoms in an optical tweezer array have been used as a quantum simulator of the spin-<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math> antiferromagnetic Ising model with longitudinal and transverse fields. We suggest how to implement the next-nearest-neighbor (NNN) interaction the sign of which is opposite to that of the nearest-neighbor one in the Rydberg atom systems. We show that this can be achieved by weakly coupling one Rydberg state with another Rydberg state. We further study the surface criticality associated with the first-order quantum phase transition between the antiferromagnetic and paramagnetic phases, which emerges due to the sign-inverted NNN interaction. From the microscopic model, we derive a Ginzburg-Landau (GL) equation, which describes static and dynamic properties of the antiferromagnetic order parameter near the transition. Using both analytical GL theory and numerical method based on a mean-field theory, we calculate the order parameter in the proximity of a boundary of the system in order to show that the healing length of the order parameter logarithmically diverges, signaling the surface criticality.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"18 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262920","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

Stability and dynamics of nonlinear excitations in a two-dimensional droplet-bearing environment 二维液滴环境中非线性激振的稳定性和动态性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033317

G. Bougas, G. C. Katsimiga, P. G. Kevrekidis, S. I. Mistakidis

{"title":"Stability and dynamics of nonlinear excitations in a two-dimensional droplet-bearing environment","authors":"G. Bougas, G. C. Katsimiga, P. G. Kevrekidis, S. I. Mistakidis","doi":"10.1103/physreva.110.033317","DOIUrl":"https://doi.org/10.1103/physreva.110.033317","url":null,"abstract":"We unravel stationary states in the form of dark soliton stripes, bubbles, and kinks embedded in a two-dimensional droplet-bearing setting emulated by an extended Gross-Pitaevskii approach. The existence of these configurations is corroborated through an effectively reduced potential picture demonstrating their concrete parametric regions of existence. The excitation spectra of such configurations are analyzed within the Bogoliubov–de Gennes framework exposing the destabilization of dark soliton stripes and bubbles, while confirming the stability of droplets, and importantly unveiling spectral stability of the kink against transverse excitations. Additionally, a variational approach is constructed providing access to the transverse stability analysis of the dark soliton stripe for arbitrary chemical potentials and widths of the structure. This is subsequently compared with the stability analysis outcome demonstrating very good agreement at small wave numbers. Dynamical destabilization of dark soliton stripes via the snake instability is showcased, while bubbles are found to feature both a splitting into a gray soliton pair and a transverse instability thereof. These results shed light on unexplored stability and instability properties of nonlinear excitations in environments featuring a competition of mean-field repulsion and beyond-mean-field attraction that can be probed by state-of-the-art experiments.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"124 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262929","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