Physical Review A最新文献_第4页

Microwave communication based on the cross-phase modulation in an inverted-Y-type Rydberg atomic system 基于倒 Y 型雷德贝格原子系统中交叉相位调制的微波通信

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033517

Y. C. Shi, C. J. Zhu, J. Y. Wu, J. Yang, Y. F. Zhang

引用次数: 0

Dense and sharp resonance peaks in stretched Moiré waveguides 拉伸莫伊里波导中密集而尖锐的共振峰

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033516

G. Alagappan, C. E. Png

{"title":"Dense and sharp resonance peaks in stretched Moiré waveguides","authors":"G. Alagappan, C. E. Png","doi":"10.1103/physreva.110.033516","DOIUrl":"https://doi.org/10.1103/physreva.110.033516","url":null,"abstract":"In this article, we demonstrate dense resonant peaks in the transmission spectra of a rectangular waveguide inscribed with a stretched moiré pattern. We investigated an array of silicon waveguides with sinusoidally modulated cladding of varying depth of modulation. The investigation reveals a critical depth of modulation that splits the geometries into weakly scattering and strongly scattering regimes. Geometries in the weakly scattering regime resemble Bragg waveguides with shallow cladding modulation, whereas in the strongly scattering regime, the geometries resemble chains of isolated dielectric particles. The guided mode photonic band gap for geometries in the strongly scattering regime is much larger than that of the weakly scattering regime. By inscribing stretched moiré patterns in the strongly scattering regime, we show that a large number of sharp peaks can be created in the transmission spectra of the waveguide. All periodic stretched moiré patterns can be identified with an R parameter. The R parameter indicates the ratio of the supercell period of the stretched system to the unstretched system. Our empirical study shows that the density of peaks linearly increases with R. The multiple resonance peaks evolve along well-defined trajectories with the quality factor defined by exponential functions of R.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"95 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262932","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

Superfluid–Bose-glass transition in a system of disordered bosons with long-range hopping in one dimension 一维长程跳变无序玻色子系统中的超流体-玻色玻璃转变

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033315

Nicolas Dupuis

{"title":"Superfluid–Bose-glass transition in a system of disordered bosons with long-range hopping in one dimension","authors":"Nicolas Dupuis","doi":"10.1103/physreva.110.033315","DOIUrl":"https://doi.org/10.1103/physreva.110.033315","url":null,"abstract":"We study the superfluid–Bose-glass transition in a one-dimensional lattice boson model with power-law decaying hopping amplitude <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>t</mi><mrow><mi>i</mi><mo>−</mo><mi>j</mi></mrow></msub><mo>∼</mo><mn>1</mn><mo>/</mo><msup><mrow><mo>|</mo><mi>i</mi><mo>−</mo><mi>j</mi><mo>|</mo></mrow><mi>α</mi></msup></mrow></math>, using bosonization and the nonperturbative functional renormalization group (FRG). When <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>α</mi></math> is smaller than a critical value <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>α</mi><mi>c</mi></msub><mo><</mo><mn>3</mn></mrow></math>, the U(1) symmetry is spontaneously broken, which leads to a density mode with nonlinear dispersion and dynamical exponent <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>z</mi><mo>=</mo><mo>(</mo><mi>α</mi><mo>−</mo><mn>1</mn><mo>)</mo><mo>/</mo><mn>2</mn></mrow></math>; the superfluid phase is then stable for sufficiently weak disorder, contrary to the case of short-range hopping where disorder is a relevant perturbation when the Luttinger parameter is smaller than <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></math>. In the presence of disorder, however, long-range hopping has no effect in the infrared limit and the FRG flow eventually becomes similar to that of a boson system with short-range hopping. This implies that the superfluid phase, when stable, exhibits a density mode with linear dispersion (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>z</mi><mo>=</mo><mn>1</mn></mrow></math>) and the superfluid–Bose-glass transition remains in the Berezinskii-Kosterlitz-Thouless universality class, while the Bose-glass fixed point is insensitive to long-range hopping. We compare our findings with a recent numerical study.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"95 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262613","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

Einstein-Podolsky-Rosen correlations in spontaneous parametric down-conversion: Beyond the Gaussian approximation 自发参量下变频中的爱因斯坦-波多尔斯基-罗森相关性：超越高斯近似

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033713

A. G. da Costa Moura, C. H. Monken

引用次数: 0

Anisotropy-induced Coulomb phase and quasiparticle zoo in the atomic monopole-spin hybrid system 原子单极-自旋混合系统中各向异性诱导的库仑相和准粒子动物园

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033316

Shao-Jun Li, Xiang Gao, Xue-Ting Fang, Lushuai Cao, Peter Schmelcher, Zhong-Kun Hu

{"title":"Anisotropy-induced Coulomb phase and quasiparticle zoo in the atomic monopole-spin hybrid system","authors":"Shao-Jun Li, Xiang Gao, Xue-Ting Fang, Lushuai Cao, Peter Schmelcher, Zhong-Kun Hu","doi":"10.1103/physreva.110.033316","DOIUrl":"https://doi.org/10.1103/physreva.110.033316","url":null,"abstract":"Quantum simulation of a monopole-spin hybrid system is performed on the basis of a dipolar ultracold gas in a ladder lattice. The site-occupation states of the dipolar ladder lattice gas can spontaneously emulate both the monopole and spin excitations. The hopping of the atoms induces a particle conversion process between spin and monopole pairs, and the dipole-dipole interaction determines the spin-spin, spin-monopole, and monopole-monopole interactions. The anisotropic nature of the dipole-dipole interaction allows hereby for a flexible engineering of the designed hybrid system, and for a significant tunability of the interaction strengths. As a result, we encounter a rich phase diagram, and specifically a self-assembled Coulomb phase arises, in which monopoles and spins coexist and are orderly arranged according to the local Gauss's law. The Coulomb phase hosts a zoo of different types of quasiparticles and provides the possibility to simulate various phenomena in particle physics, such as a degenerate vacuum, particle decay, and conversion processes. Our work provides a significant extension of the scope of quantum simulations based on the anisotropy of dipolar interactions.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"16 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262616","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

Noise-induced coherent ergotropy of a quantum heat engine 量子热机的噪声诱导相干各向异性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.032213

Manash Jyoti Sarmah, Himangshu Prabal Goswami

引用次数: 0

Two ultracold atoms in a quasi-two-dimensional box confinement 准二维盒约束中的两个超冷原子

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033318

Fan Yang, Ruijie Du, Ran Qi, Peng Zhang

{"title":"Two ultracold atoms in a quasi-two-dimensional box confinement","authors":"Fan Yang, Ruijie Du, Ran Qi, Peng Zhang","doi":"10.1103/physreva.110.033318","DOIUrl":"https://doi.org/10.1103/physreva.110.033318","url":null,"abstract":"We investigate the scattering and two-body bound states of two ultracold atoms in a quasi-two-dimensional (quasi-2D) confinement, with the confinement potential being an infinitely deep square well (box potential) in the transverse (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>z</mi></math>) direction, and the motion of the atoms in the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>x</mi><mtext>−</mtext><mi>y</mi></mrow></math> plane being free. Specifically, we calculate the effective 2D scattering length and 2D effective range parameter of the low-energy scattering, as well as the energy and the transverse-excited-mode probability of the bound states. Comparing these results with those obtained under a harmonic transverse confinement potential, which has the same characteristic length as the box potential, we find that in most of the cases the 2D effective range parameter for the box confinement is approximately 0.28 of the one for the harmonic confinement. Moreover, the transverse-excited-mode probability of the bound states for the box confinement is also much lower than the one for the harmonic confinement. These results suggest that the transverse excitation in the box confinement is notably weaker than the one in the harmonic confinement with the same characteristic length. Therefore, achieving quasi-2D ultracold gases well described by pure-2D effective models, particularly those with 2D contact interaction, is more feasible through box confinement. Our results are helpful for the quantum simulation of 2D many-body physics with ultracold atoms, e.g., the suppression of 2D effective range parameter may lead to an enhancement of quantum anomaly in two-dimensional Fermi gases. Additionally, our calculation method is applicable to the two-body problems of ultracold atoms in other types of quasi-2D confinements.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"48 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262930","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

Generation of high-order harmonics with hybrid spin and transverse orbital angular momentum from a crystalline solid 从晶体固体中产生具有混合自旋和横向轨道角动量的高阶谐波

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.033110

Jianing Zhang, Zijian Lyu, Lei Geng, Xiulan Liu, Yunquan Liu, Liang-You Peng

引用次数: 0

Machine-learning models for atom-diatom reactions across isotopologues 跨同位素原子-原子反应的机器学习模型

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-16 DOI: 10.1103/physreva.110.032811

Daniel Julian, Rian Koots, Jesús Pérez-Ríos

{"title":"Machine-learning models for atom-diatom reactions across isotopologues","authors":"Daniel Julian, Rian Koots, Jesús Pérez-Ríos","doi":"10.1103/physreva.110.032811","DOIUrl":"https://doi.org/10.1103/physreva.110.032811","url":null,"abstract":"This work shows that feed-forward neural networks can predict the final rovibrational state distributions of inelastic and reactive processes of the reaction of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Ca</mi><mo>+</mo><msub><mi mathvariant=\"normal\">H</mi><mn>2</mn></msub><mo>→</mo><mi>CaH</mi><mo>+</mo><mi mathvariant=\"normal\">H</mi></mrow></math> in the hyperthermal regime, relevant for buffer gas chemistry. Furthermore, these models can be extended to the isotopologues of the reaction involving deuterium and tritium. In addition, we develop a neural network model that can learn across the chemical space based on the isotopologues of hydrogen. The model can predict the outcome of a reaction whose reactants have never been seen. This is done by training on the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Ca</mi><mo>+</mo><msub><mi mathvariant=\"normal\">H</mi><mn>2</mn></msub></mrow></math> and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Ca</mi><mo>+</mo><msub><mi mathvariant=\"normal\">T</mi><mn>2</mn></msub></mrow></math> reactions and subsequently predicting the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Ca</mi><mo>+</mo><msub><mi mathvariant=\"normal\">D</mi><mn>2</mn></msub></mrow></math> reaction.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"25 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262936","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

Generation of vortex electrons in tunneling ionization of polyatomic molecules: Exact results in the zero-range potential model 多原子分子隧道电离中涡旋电子的产生：零电势模型的精确结果

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-13 DOI: 10.1103/physreva.110.033107

Kirill V. Bazarov, Oleg I. Tolstikhin

{"title":"Generation of vortex electrons in tunneling ionization of polyatomic molecules: Exact results in the zero-range potential model","authors":"Kirill V. Bazarov, Oleg I. Tolstikhin","doi":"10.1103/physreva.110.033107","DOIUrl":"https://doi.org/10.1103/physreva.110.033107","url":null,"abstract":"The theory of molecular Siegert states in a static electric field in the zero-range potential model is developed. The model admits extended analytical and accurate numerical treatments, which enables one to study tunneling ionization of large polyatomic molecules with complex geometry in strong fields beyond the weak-field approximation. The theory is illustrated by calculations for three model molecules reproducing the geometry of the real water, benzene, and leucine molecules. The field and orientation dependence of two major ionization observables, the ionization rate and the transverse momentum distribution of liberated electrons, is analyzed. The calculations reveal a number of strong-field effects not accounted for by the weak-field asymptotic theory. In particular, it is shown that vortex electrons are efficiently generated in tunneling ionization of large molecules at sufficiently strong fields, which opens a perspective for enantiosensitive rescattering photoelectron spectroscopy. The mechanism of tunneling-induced electron diffraction and its manifestation in the transverse momentum distribution are discussed.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"40 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262620","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