Physical Review A最新文献_第10页

Controllable and tunable topological multiport beam splitter in an extended Su-Schrieffer-Heeger array 扩展 Su-Schrieffer-Heeger 阵列中的可控可调拓扑多端口分光器

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.032406

Ming-jie Liao, Mei-Song Wei, Yi-Qing Wang, Jingping Xu, Yaping Yang

{"title":"Controllable and tunable topological multiport beam splitter in an extended Su-Schrieffer-Heeger array","authors":"Ming-jie Liao, Mei-Song Wei, Yi-Qing Wang, Jingping Xu, Yaping Yang","doi":"10.1103/physreva.110.032406","DOIUrl":"https://doi.org/10.1103/physreva.110.032406","url":null,"abstract":"We demonstrate a controllable and tunable topological beam splitter with a multiport based on the one-dimensional extended Su-Schrieffer-Heeger model, which supports the topological interface by introducing the nearest-neighbor (NN) coupling defect at the central site. The quantum state initially prepared at the interface can be transmitted with high fidelity to multiple output ports with equal or unequal probability on both sides of the model by modulating the NN coupling between the sites in the time domain. We show that the output port can be added by increasing the number of sublattices <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>a</mi></math>. Especially, by setting the on-site potential energy, we can easily control the direction of the quantum state transfer process and ensure that this state is only transmitted to the multiple output ports on the left or multiple output ports on the right, which realizes the function of topological switching. Benefiting from the topological protection of the edge states, the quantum states can be transmitted with high fidelity even if there is the NN coupling disorder. Our work realizes a robust and multifunctional topological beam splitter.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"5 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205881","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

Heavy-particle quantum electrodynamics 重粒子量子电动力学

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.032804

Krzysztof Pachucki, Vladimir A. Yerokhin

引用次数: 0

Elucidating the roles of collision energy and photon momentum transfer in the formation of ultralong-range Rydberg molecules 阐明碰撞能量和光子动量传递在超远距离雷德贝格分子形成中的作用

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.032803

C. Wang, Y. Lu, S. K. Kanungo, F. B. Dunning, T. C. Killian, S. Yoshida

{"title":"Elucidating the roles of collision energy and photon momentum transfer in the formation of ultralong-range Rydberg molecules","authors":"C. Wang, Y. Lu, S. K. Kanungo, F. B. Dunning, T. C. Killian, S. Yoshida","doi":"10.1103/physreva.110.032803","DOIUrl":"https://doi.org/10.1103/physreva.110.032803","url":null,"abstract":"Spectroscopic measurements of the rotational distribution of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Sr</mi><mprescripts></mprescripts><none></none><mn>84</mn></mmultiscripts></math> and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mmultiscripts><mi>Sr</mi><mprescripts></mprescripts><none></none><mn>86</mn></mmultiscripts><mspace width=\"4pt\"></mspace><mspace width=\"0.16em\"></mspace><mn>5</mn><mi>s</mi><mi>n</mi><mi>s</mi><msup><mrow><mspace width=\"0.16em\"></mspace></mrow><mn>1</mn></msup><msub><mi>S</mi><mn>0</mn></msub></mrow></math> ultralong-range Rydberg molecular dimers created via photoassociation in a cold gas are reported. The dimers are produced by two-photon excitation via the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>5</mn><mi>s</mi><mn>5</mn><mi>p</mi></mrow></math> <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>P</mi><mn>1</mn><none></none><mprescripts></mprescripts><none></none><mn>1</mn></mmultiscripts></math> intermediate state. The use of singlet states permits detailed study of the roles that the initial atom-atom interaction, photon momentum transfer during Rydberg excitation, and sample temperature play in determining the spectral line shape and final dimer rotational distribution. The results are in good agreement with the predictions of a model that includes these effects. The present work further highlights the sensitivity of ultralong-range Rydberg molecule formation to the state of the initial cold gas.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"57 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205883","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

Krylov spread complexity of quantum walks 量子行走的克雷洛夫扩散复杂性

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.032206

Bhilahari Jeevanesan

引用次数: 0

Propagation and material-interface effects in the higher-order harmonic radiation from solid-state samples 固态样品高阶谐波辐射中的传播和材料表面效应

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.033512

M. Kolesik

{"title":"Propagation and material-interface effects in the higher-order harmonic radiation from solid-state samples","authors":"M. Kolesik","doi":"10.1103/physreva.110.033512","DOIUrl":"https://doi.org/10.1103/physreva.110.033512","url":null,"abstract":"The propagation effects reshaping the excitation pulse are known to exhibit a strong influence on the high-harmonic generation (HHG) in solid-state media. Previous measurements showed that the midinfrared pulse dynamics, most importantly the nonlinear loss and spectral broadening, can dampen or even extinguish the highest harmonic peaks. Despite the importance of these effects, their inclusion in the HHG modeling has been so far restricted to one-dimensional propagation and/or very thin samples. This work demonstrates an approach where the driving pulse is simulated with a full spatial and temporal resolution in samples of realistic thickness while the material interfaces are included as well. We show that the HHG spectrum measured in the transmission geometry is greatly affected by the Fresnel reflections causing interference in the vicinity of the material surface, and we find that different parts of the harmonic spectra originate from different regions of the material sample. Our results underline the importance of realistic and comprehensive simulations in the interpretation of high-harmonic generation from solids in the transmission geometry.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"6 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205882","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

Combining physics-informed neural networks with the freezing mechanism for general Hamiltonian learning 将物理信息神经网络与一般哈密顿学习的冻结机制相结合

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.032607

Leonardo K. Castelano, Iann Cunha, Fabricio S. Luiz, Reginaldo de Jesus Napolitano, Marcelo V. de Souza Prado, Felipe F. Fanchini

{"title":"Combining physics-informed neural networks with the freezing mechanism for general Hamiltonian learning","authors":"Leonardo K. Castelano, Iann Cunha, Fabricio S. Luiz, Reginaldo de Jesus Napolitano, Marcelo V. de Souza Prado, Felipe F. Fanchini","doi":"10.1103/physreva.110.032607","DOIUrl":"https://doi.org/10.1103/physreva.110.032607","url":null,"abstract":"The precision required to characterize a Hamiltonian is central to developing advantageous quantum computers, providing powerful advances in quantum sensing and crosstalk mitigation. Traditional methods to determine a Hamiltonian are difficult due to the intricacies of quantum systems, involving numbers of equations and parameters that grow exponentially with the number of qubits. To mitigate these shortcomings, in this paper, we introduce an innovative and effective procedure integrating a physics-informed neural network (PINN) with a freezing mechanism to learn the Hamiltonian parameters efficiently. Although PINN and experimental data alone would become impractical as <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>N</mi></math> increases, the mechanism we introduce freezes the interactions of most of the qubits, leaving just a qubit subsystem to be analyzed by the PINN method. Determination of all physical parameters is accomplished by analyzing the system by parts until completion. We validated the efficacy of our method using simulation data obtained from the IBM quantum computer to obtain the training data and we found that a PINN can learn the two-qubit parameters with high accuracy, achieving a median error of less than <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>0.1</mn><mo>%</mo></mrow></math> for systems of up to four qubits. We have successfully combined the PINN analysis of two qubits with the freezing mechanism in the case of a four-qubit system.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"10 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205879","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

Stable collective charging of ultracold-atom quantum batteries 超冷原子量子电池的稳定集体充电

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.032205

Abel Rojo-Francàs, Felipe Isaule, Alan C. Santos, Bruno Juliá-Díaz, Nikolaj Thomas Zinner

引用次数: 0

Information trapping in quantum communications 量子通信中的信息陷阱

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-06 DOI: 10.1103/physreva.110.032608

Seyed Mohammad Hosseiny, Jamileh Seyed-Yazdi, Milad Norouzi

{"title":"Information trapping in quantum communications","authors":"Seyed Mohammad Hosseiny, Jamileh Seyed-Yazdi, Milad Norouzi","doi":"10.1103/physreva.110.032608","DOIUrl":"https://doi.org/10.1103/physreva.110.032608","url":null,"abstract":"Many quantum systems display Markovian and non-Markovian behaviors with the information flow and backflow between the system and the surrounding environment. In this paper, we introduce a definition of the dynamics of open quantum systems called information trapping, which is a special case of the information flow. We show that under specific conditions, the information flow can exhibit behavior beyond Markovian or non-Markovian system dynamics. The physical reason behind this phenomenon may arise from the entanglement between the system and the environment, such that the rates of entangling and disentangling can equalize over time, influenced by the quantum memory of the system and environmental decoherence effects. This proposal is investigated by considering some witnesses of the behavior of the system dynamics such as fidelity, trace distance, the Holevo quantity, and Hilbert-Schmidt speed in the quantum teleportation and dense coding protocols based on the open quantum system consisting of an <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>X</mi><mi>X</mi><mi>Z</mi></mrow></math> chain Heisenberg affected by intrinsic decoherence. The main achievement of this work is focused on facilitating access to faithful quantum communication.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"3 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205884","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

Simulating optically active spin defects with a quantum computer 用量子计算机模拟光学活性自旋缺陷

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-05 DOI: 10.1103/physreva.110.032606

Jack S. Baker, Pablo A. M. Casares, Modjtaba Shokrian Zini, Jaydeep Thik, Debasish Banerjee, Chen Ling, Alain Delgado, Juan Miguel Arrazola

{"title":"Simulating optically active spin defects with a quantum computer","authors":"Jack S. Baker, Pablo A. M. Casares, Modjtaba Shokrian Zini, Jaydeep Thik, Debasish Banerjee, Chen Ling, Alain Delgado, Juan Miguel Arrazola","doi":"10.1103/physreva.110.032606","DOIUrl":"https://doi.org/10.1103/physreva.110.032606","url":null,"abstract":"There is a pressing need for more accurate computational simulations of the optoelectronic properties of defects in materials to aid in the development of quantum sensing platforms. In this work, we explore how quantum computers could be effectively utilized for this purpose. Specifically, we develop fault-tolerant quantum algorithms to simulate optically active defect states and their radiative emission rates. We employ quantum defect embedding theory to translate the Hamiltonian of a defect-containing supercell into a smaller, effective Hamiltonian that accounts for dielectric screening effects. Our approach integrates block-encoding of the dipole operator with quantum phase estimation to selectively sample the optically active excited states that exhibit the largest dipole transition amplitudes. We also provide estimates of the quantum resources required to simulate a negatively charged boron vacancy in a hexagonal boron nitride cluster. We conclude by offering a forward-looking perspective on the potential of quantum computers to enhance quantum sensor capabilities and identify specific scenarios where quantum computing can resolve problems traditionally challenging for classical computers.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":"45 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205890","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

Number of bits returned by a quantum estimation 量子估算返回的比特数

IF 2.9 2区物理与天体物理

Physical Review A Pub Date : 2024-09-05 DOI: 10.1103/physreva.110.032405

Xi Lu, Wojciech Górecki, Chiara Macchiavello, Lorenzo Maccone

引用次数: 0