Physical Review A最新文献_第9页

Interplay of finite- and infinite-size stability in quadratic bosonic Lindbladians 二次玻色林德布拉德中有限和无限大小稳定性的相互作用

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.032207

Mariam Ughrelidze, Vincent P. Flynn, Emilio Cobanera, Lorenza Viola

{"title":"Interplay of finite- and infinite-size stability in quadratic bosonic Lindbladians","authors":"Mariam Ughrelidze, Vincent P. Flynn, Emilio Cobanera, Lorenza Viola","doi":"10.1103/physreva.110.032207","DOIUrl":"https://doi.org/10.1103/physreva.110.032207","url":null,"abstract":"We provide a framework for understanding dynamical metastability in open many-body systems of free bosons, whereby the dynamical stability properties of the system in the infinite-size (thermodynamic) limit may sharply differ from those of any finite-size truncation, and anomalous transient dynamics may arise. By leveraging pseudospectral techniques, we trace the discrepancy between asymptotic and transient dynamics to the non-normality of the underlying quadratic bosonic Lindbladian (QBL) generator and show that two distinct flavors of dynamical metastability can arise. QBLs exhibiting type I dynamical metastability, previously discussed in the context of anomalous transient amplification [Phys. Rev. Lett. 127, 245701 (2021)], are dynamically unstable in the infinite-size limit yet stable once open boundaries are imposed. In contrast, type II dynamically metastable QBLs, which we uncover in this work, are dynamically stable for infinite size but become unstable under open boundary conditions for arbitrary finite system size. We exhibit representative models for both types of metastability in the dissipative, as well as the closed-system (Hamiltonian) settings, and analyze distinctive behavior they can engender. We show that dynamical metastability manifests itself in the generation of entanglement entropy by way of a transient which reflects the stability phase of the infinite (rather than the actual finite) system and, as a result, is directly tied to the emergence of supervolume entanglement scaling in type I systems. Finally, we demonstrate how, even in Hermitian, and especially in highly non-normal regimes, the spectral properties of an infinite-size QBL are reflected in the linear response functions of the corresponding finite QBLs by way of resonant pseudospectral modes.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"6 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205918","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

Momentum-dependent quasiparticle properties of the Fermi polaron from the functional renormalization group 从函数重正化组看费米极子随动量变化的准粒子特性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.033309

Jonas von Milczewski, Richard Schmidt

{"title":"Momentum-dependent quasiparticle properties of the Fermi polaron from the functional renormalization group","authors":"Jonas von Milczewski, Richard Schmidt","doi":"10.1103/physreva.110.033309","DOIUrl":"https://doi.org/10.1103/physreva.110.033309","url":null,"abstract":"We study theoretically the lifetimes of attractive and repulsive Fermi polarons, as well as the molecule at finite momentum in three dimensions. To this end, we develop a technique that allows for the computation of Green's functions in the whole complex frequency plane using exact analytical continuation within the functional renormalization group. The improved numerical stability and reduced computational cost of this method yield access to previously inaccessible momentum-dependent quasiparticle properties of low-lying excited states. While conventional approaches like the non-self-consistent <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>T</mi></math>-matrix approximation method cannot determine these lifetimes, we are able to find the momentum-dependent lifetime at different interaction strengths of both the attractive and repulsive polaron as well as the molecule. At weak coupling our results confirm predictions made from effective Fermi liquid theory regarding the decay of the attractive polaron, and we demonstrate that Fermi liquidlike behavior extends far into the strong-coupling regime where the attractive polaron and molecule exhibit a <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi>p</mi><mn>4</mn></msup></math> momentum scaling in their decay widths. Our results offer an intriguing insight into the momentum-dependent quasiparticle properties of the Fermi polaron problem, which can be measured using techniques such as Raman transfer and Ramsey interferometry.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"1 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205873","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

Limitations in fluorescence-detected entangled two-photon-absorption experiments: Exploring the low- to high-gain squeezing regimes 荧光检测纠缠双光子吸收实验的局限性：探索从低增益到高增益的挤压机制

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.033708

Tiemo Landes, Brian J. Smith, Michael G. Raymer

{"title":"Limitations in fluorescence-detected entangled two-photon-absorption experiments: Exploring the low- to high-gain squeezing regimes","authors":"Tiemo Landes, Brian J. Smith, Michael G. Raymer","doi":"10.1103/physreva.110.033708","DOIUrl":"https://doi.org/10.1103/physreva.110.033708","url":null,"abstract":"We closely replicated and extended a recent experiment [Phys. Rev. Lett. 129, 183601 (2022)] that reportedly observed enhancement of two-photon-absorption rates in molecular samples by using time-frequency-entangled photon pairs, and we found that in the low-flux regime, where such enhancement is theoretically predicted in principle, the two-photon fluorescence signal is below the detection threshold using current state-of-the-art methods. The results are important in the context of efforts to enable quantum-enhanced molecular spectroscopy and imaging at ultra-low optical flux. Using an optical parametric down-conversion photon-pair source that can be varied from the low-gain spontaneous regime to the high-gain squeezing regime, we observed two-photon-induced fluorescence in the high-gain regime, but in the low-gain regime any fluorescence was below detection threshold. We supplemented the molecular fluorescence experiments with a study of nonlinear-optical sum-frequency generation, for which we are able to observe the low-to-high-gain crossover, thereby verifying our theoretical models and experimental techniques. The observed rates (or lack thereof) in both experiments are consistent with theoretical predictions and with our previous experiments, and indicate that time-frequency photon entanglement does not provide a practical means to enhance in-solution molecular two-photon fluorescence spectroscopy or imaging with current techniques.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"32 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205875","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

Correspondence between quasiparticle dissipation and quantum information decay in open quantum systems 开放量子系统中准粒子耗散与量子信息衰减之间的对应关系

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.032407

Zihang Wang, Dirk Bouwmeester

{"title":"Correspondence between quasiparticle dissipation and quantum information decay in open quantum systems","authors":"Zihang Wang, Dirk Bouwmeester","doi":"10.1103/physreva.110.032407","DOIUrl":"https://doi.org/10.1103/physreva.110.032407","url":null,"abstract":"Diagrammatic techniques simplify a weakly interacting many-body problem into an effective few-quasiparticle problem within a system of interest (SOI). If scattering events, mediated by a bath, between those quasiparticles can be approximated as density-density interactions, the bath behaves like an effective external potential. On the other hand, exchange interactions could entangle those quasiparticles and the bath, leading to an open quantum system that induces quantum decoherence and spectral broadening. We investigate the renormalized interaction between the SOI and the bath, employing a projection operator technique similar to the one used in the Nakajima-Zwanzig method. We find that the frequency variation of this renormalized interaction is analogous to the quasiparticle residue and provides a measure of the SOI-bath separability that serves as the lower bound of the SOI-bath entanglement entropy. In the weak-coupling regime and continuum limit, we demonstrate that the degree of SOI-bath separability corresponds to the quasiparticle spectral weight in the single-impurity Anderson model and find that the loss of quantum information to the continuum of the bath can be understood as a decay process where an initial single-impurity state escapes to a thermal bath. This work provides a direction for connecting energy dissipation in quasiparticles propagation to the loss of quantum information in open quantum systems.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"45 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205922","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

Two-photon dynamics in non-Markovian waveguide QED with a giant atom 带有巨原子的非马尔可夫波导 QED 中的双光子动力学

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.033707

Wenju Gu, Tao Li, Ye Tian, Zhen Yi, Gao-xiang Li

引用次数: 0

Exactly solvable model of light-scattering errors in quantum simulations with metastable trapped-ion qubits 陨落困离子量子模拟中光散射误差的精确可解模型

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.l030803

Phillip C. Lotshaw, Brian C. Sawyer, Creston D. Herold, Gilles Buchs

引用次数: 0

Spatiospectral control of spontaneous emission 自发辐射的频谱控制

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.033706

Seyyed Hossein Asadpour, Muqaddar Abbas, Hamid R. Hamedi, Julius Ruseckas, Emmanuel Paspalakis, Reza Asgari

{"title":"Spatiospectral control of spontaneous emission","authors":"Seyyed Hossein Asadpour, Muqaddar Abbas, Hamid R. Hamedi, Julius Ruseckas, Emmanuel Paspalakis, Reza Asgari","doi":"10.1103/physreva.110.033706","DOIUrl":"https://doi.org/10.1103/physreva.110.033706","url":null,"abstract":"We propose a scheme aimed at achieving spatiospectral control over spontaneous emission within a four-level atom-light coupling system interacting with optical vortices carrying orbital angular momentum (OAM). The atom comprises a ground level and two excited states coupled with two laser fields, forming a V subsystem where the upper states exclusively decay to a common fourth state via two channels. By investigating various initial states of the atom and considering the presence or absence of quantum interference in spontaneous emission channels, we analyze how the characteristics of the OAM-carrying vortex beam imprint onto the emission spectrum. The interplay between the optical vortex and the quantum system, including its environment modes, induces a wide variety of spatiospectral behavior, including two-dimensional spectral-peak narrowing, spectral-peak enhancement, spectral-peak suppression, and spontaneous emission reduction or quenching in the spatial azimuthal plane. Our findings shed light on the dynamics of atom–vortex-beam light interactions and offer insights into the manipulation of emission properties at the quantum level.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"7 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205928","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

Local model for the optical energy and momentum transfer in dielectric media and the microscopic origin of Abraham's force density 介质中光能和光动量传递的局部模型以及亚伯拉罕力密度的微观起源

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.033513

B. Anghinoni, M. Partanen, N. G. C. Astrath

引用次数: 0

Unifying uncertainties for rotorlike quantum systems 统一类转子量子系统的不确定性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.032208

Ladislav Mišta, Jr., Matouš Mišta, Zdeněk Hradil

{"title":"Unifying uncertainties for rotorlike quantum systems","authors":"Ladislav Mišta, Jr., Matouš Mišta, Zdeněk Hradil","doi":"10.1103/physreva.110.032208","DOIUrl":"https://doi.org/10.1103/physreva.110.032208","url":null,"abstract":"The quantum rotor represents, after the harmonic oscillator, the next obvious quantum system to study the complementary pair of variables: the angular momentum and the unitary shift operator in angular momentum. Proper quantification of uncertainties and the incompatibility of these two operators are thus essential for applications of rotorlike quantum systems. While angular momentum uncertainty is characterized by variance, several uncertainty measures have been proposed for the shift operator, with dispersion the simplest example. We establish a hierarchy of those measures and corresponding uncertainty relations which are all perfectly or almost perfectly saturated by a tomographically complete set of von Mises states. Building on the interpretation of dispersion as the moment of inertia of the unit ring we then show that the other measures also possess the same mechanical interpretation. This unifying perspective allows us to express all measures as a particular instance of a single generic angular uncertainty measure. The importance of these measures is then highlighted by applying the simplest two of them to derive optimal simultaneous measurements of the angular momentum and the shift operator. Finally, we argue that the model of quantum rotor extends beyond its mechanical meaning with promising applications in the fields of singular optics, superconductive circuits with a Josephson junction, or optimal pulse shaping in the time-frequency domain. Our findings lay the groundwork for quantum-information and metrological applications of the quantum rotor and point to its interdisciplinary nature.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"7 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205919","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

Estimating correlations and entanglement in the two-dimensional Heisenberg model in the strong-rung-coupling limit 估算强环耦合极限下二维海森堡模型中的相关性和纠缠性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-09 DOI: 10.1103/physreva.110.032408

Chandrima B. Pushpan, Harikrishnan K J, Prithvi Narayan, Amit Kumar Pal

{"title":"Estimating correlations and entanglement in the two-dimensional Heisenberg model in the strong-rung-coupling limit","authors":"Chandrima B. Pushpan, Harikrishnan K J, Prithvi Narayan, Amit Kumar Pal","doi":"10.1103/physreva.110.032408","DOIUrl":"https://doi.org/10.1103/physreva.110.032408","url":null,"abstract":"We consider the isotropic Heisenberg model in a magnetic field in the strong-rung-coupling limit on a two-dimensional (2D) rectangular zig-zag lattice of arbitrary size, and determine the one-dimensional (1D) effective model representing the low-energy manifold of the 2D model up to second order in perturbation theory. We consider a number of Hermitian operators defined on the Hilbert space of the 2D model, and systematically work out their action on the low-energy manifold, which are operators on the Hilbert space of the 1D effective model. For a class of operators among them, we demonstrate that the expectation values computed in the low-energy manifold of the 2D model can be mimicked by the expectation values of the corresponding operators in the 1D effective model even beyond the perturbation regime of the system parameters. We further argue that quantitatively estimating partial trace-based measures of entanglement in the 2D model may be done in the same fashion only in the perturbation regime. Our results and approach are expected to be useful in investigating observables and entanglement in the 2D models with large system sizes due to the advantage of using the effective 1D model with a smaller Hilbert space as a proxy.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"147 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205923","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