AVS quantum science最新文献_第6页

Physics simulation via quantum graph neural network 量子图神经网络物理仿真

AVS quantum science Pub Date : 2023-01-11 DOI: 10.1116/5.0145722

Benjamin Collis, Saahil Patel, Daniel Koch, Massimiliano Cutugno, L. Wessing, P. Alsing

{"title":"Physics simulation via quantum graph neural network","authors":"Benjamin Collis, Saahil Patel, Daniel Koch, Massimiliano Cutugno, L. Wessing, P. Alsing","doi":"10.1116/5.0145722","DOIUrl":"https://doi.org/10.1116/5.0145722","url":null,"abstract":"We develop and implement two realizations of quantum graph neural networks (QGNN), applied to the task of particle interaction simulation. The first QGNN is a speculative quantum-classical hybrid learning model that relies on the ability to directly utilize superposition states as classical information to propagate information between particles. The second is an implementable quantum-classical hybrid learning model that propagates particle information directly through the parameters of RX rotation gates. A classical graph neural network (CGNN) is also trained in the same task. Both the Speculative QGNN and CGNN act as controls against the Implementable QGNN. Comparison between classical and quantum models is based on the loss value and accuracy of each model. Overall, each model had a high learning efficiency, in which the loss value rapidly approached zero during training; however, each model was moderately inaccurate. Comparing performances, our results show that the Implementable QGNN has a potential advantage over the CGNN. Additionally, we show that a slight alteration in hyperparameters in the CGNN notably improves accuracy, suggesting that further fine tuning could mitigate the issue of moderate inaccuracy in each model.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":"42 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41261828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thresholded quantum LIDAR in turbolent media 涡轮介质中的阈值量子激光雷达

AVS quantum science Pub Date : 2022-12-01 DOI: 10.1116/5.0107125

Walter Zedda, I. Gianani, V. Berardi, M. Barbieri

引用次数: 1

Retraction: “The origin of Franson-type nonlocal correlation” [AVS Quantum Sci. 4, 021401 (2022)] 撤回:“franson型非局域相关的起源”[AVS量子科学，4,021401 (2022)]

AVS quantum science Pub Date : 2022-12-01 DOI: 10.1116/5.0129884

B. Ham

引用次数: 0

Classical model of quantum interferometry tests of macrorealism 量子干涉测量的经典模型宏观实在论检验

AVS quantum science Pub Date : 2022-12-01 DOI: 10.1116/5.0131209

B. L. La Cour

引用次数: 0

Simulation of a laser-driven three-level system by a noisy quantum computer 用噪声量子计算机模拟激光驱动的三能级系统

AVS quantum science Pub Date : 2022-12-01 DOI: 10.1116/5.0098614

T. Nishi, E. Lötstedt, K. Yamanouchi

引用次数: 0

Obtaining a single-photon weak value from experiments using a strong (many-photon) coherent state 利用强(多光子)相干态从实验中获得单光子弱值

AVS quantum science Pub Date : 2022-11-28 DOI: 10.1116/5.0137579

H. Wiseman, Aephraim M. Steinberg, M. Hallaji

引用次数: 2

Quantum memory effects in atomic ensembles coupled to photonic cavities 耦合到光子腔的原子系综中的量子记忆效应

AVS quantum science Pub Date : 2022-11-15 DOI: 10.1116/5.0137078

Adam Burgess, Marian Florescu

{"title":"Quantum memory effects in atomic ensembles coupled to photonic cavities","authors":"Adam Burgess, Marian Florescu","doi":"10.1116/5.0137078","DOIUrl":"https://doi.org/10.1116/5.0137078","url":null,"abstract":"This article explores the dynamics of many-body atomic systems symmetrically coupled to Lorentzian photonic cavity systems. Our study reveals interesting dynamical characteristics, including non-zero steady states, super-radiant decay, enhanced energy transfer, and the ability to modulate oscillations in the atomic system by tuning environmental degrees of freedom. We also analyze a configuration consisting of a three-atom chain embedded in a photonic cavity. Similarly, we find a strong enhancement of the energy transfer rate between the two ends of the chain and identified specific initial conditions that lead to significantly reduced dissipation between the two atoms at the end of the chain. Another configuration of interest consists of two symmetrical detuned reservoirs with respect to the atomic system. In the single atom case, we show that it is possible to enhance the decay rate of the system by modulating its reservoir detuning. In contrast, in the many-atom case, this results in dynamics akin to the on-resonant cavity. Finally, we examine the validity of the rotating wave approximation through a direct comparison against the numerically exact hierarchical equations of motion. We find good agreement in the weak coupling regime, while in the intermediate coupling regime, we identify qualitative similarities, but the rotating wave approximation becomes less reliable. In the moderate coupling regime, we find deviations of the steady states due to the formation of mixed photon-atom states.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63540735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiparameter estimation of continuous-time quantum walk Hamiltonians through machine learning 基于机器学习的连续时间量子行走哈密顿算子的多参数估计

AVS quantum science Pub Date : 2022-11-10 DOI: 10.1116/5.0137398

I. Gianani, C. Benedetti

引用次数: 2

The SWAP imposter: Bidirectional quantum teleportation and its performance SWAP冒名顶替者：双向量子隐形传态及其性能

AVS quantum science Pub Date : 2022-10-19 DOI: 10.1116/5.0135467

Aliza U. Siddiqui, M. Wilde

{"title":"The SWAP imposter: Bidirectional quantum teleportation and its performance","authors":"Aliza U. Siddiqui, M. Wilde","doi":"10.1116/5.0135467","DOIUrl":"https://doi.org/10.1116/5.0135467","url":null,"abstract":"Bidirectional quantum teleportation is a fundamental protocol for exchanging quantum information between two parties. Specifically, two individuals make use of a shared resource state as well as local operations and classical communication (LOCC) to swap quantum states. In this work, we concisely highlight the contributions of our companion paper [A. U. Siddiqui and M. M. Wilde, arXiv:2010.07905 (2020)]. We develop two different ways of quantifying the error of nonideal bidirectional teleportation by means of the normalized diamond distance and the channel infidelity. We then establish that the values given by both metrics are equal for this task. Additionally, by relaxing the set of operations allowed from LOCC to those that completely preserve the positivity of the partial transpose, we obtain semidefinite programing lower bounds on the error of nonideal bidirectional teleportation. We evaluate these bounds for some key examples—isotropic states and when there is no resource state at all. In both cases, we find an analytical solution. The second example establishes a benchmark for classical versus quantum bidirectional teleportation. Another example that we investigate consists of two Bell states that have been sent through a generalized amplitude damping channel. For this scenario, we find an analytical expression for the error, as well as a numerical solution that agrees with the former up to numerical precision.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48326191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Waveguided sources of consistent, single-temporal-mode squeezed light: the good, the bad, and the ugly 一致的、单时间模压缩光的波导光源:好的、坏的和丑陋的

AVS quantum science Pub Date : 2022-09-27 DOI: 10.1116/5.0133009

M. Houde, N. Quesada

引用次数: 2