New Journal of Physics最新文献_第7页

Photon discerner: adaptive quantum optical sensing near the shot noise limit 光子识别器：接近射出噪声极限的自适应量子光学传感

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-30 DOI: 10.1088/1367-2630/ad6584

Fanglin Bao, Leif Bauer, Adrián E Rubio López, Ziyi Yang, Xueji Wang, Zubin Jacob

{"title":"Photon discerner: adaptive quantum optical sensing near the shot noise limit","authors":"Fanglin Bao, Leif Bauer, Adrián E Rubio López, Ziyi Yang, Xueji Wang, Zubin Jacob","doi":"10.1088/1367-2630/ad6584","DOIUrl":"https://doi.org/10.1088/1367-2630/ad6584","url":null,"abstract":"Photon statistics of an optical field can be used for quantum optical sensing in low light level scenarios free of bulky optical components. However, photon-number-resolving detection to unravel the photon statistics is challenging. Here, we propose a novel detection approach, that we call ‘photon discerning’, which uses adaptive photon thresholding for photon statistical estimation without recording exact photon numbers. Our photon discerner is motivated by the field of neural networks where tunable thresholds have proven efficient for information extraction in machine learning tasks. The photon discerner maximizes Fisher information per photon by iteratively choosing the optimal threshold in real-time to approach the shot noise limit. Our proposed scheme of adaptive photon thresholding leads to unique remote-sensing applications of quantum degree of linear polarization camera and quantum LiDAR. We investigate optimal thresholds and show that the optimal photon threshold can be counter-intuitive (not equal to 1) even for weak signals (mean photon number much less than 1), due to the photon bunching effect. We also put forth a superconducting nanowire realization of the photon discerner which can be experimentally implemented in the near-term. We show that the adaptivity of our photon discerner enables it to beat realistic photon-number-resolving detectors with limited photon-number resolution in certain applications. Our work suggests a new class of detectors for information-theory driven, compact, and learning-based quantum optical sensing.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"11 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141866914","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

Single entanglement connection architecture between multi-layer bipartite hardware efficient ansatz 多层二方硬件之间的单纠缠连接架构高效解析

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-25 DOI: 10.1088/1367-2630/ad64fb

Shikun Zhang, Zheng Qin, Yang Zhou, Rui Li, Chunxiao Du and Zhisong Xiao

{"title":"Single entanglement connection architecture between multi-layer bipartite hardware efficient ansatz","authors":"Shikun Zhang, Zheng Qin, Yang Zhou, Rui Li, Chunxiao Du and Zhisong Xiao","doi":"10.1088/1367-2630/ad64fb","DOIUrl":"https://doi.org/10.1088/1367-2630/ad64fb","url":null,"abstract":"Variational quantum algorithms are among the most promising algorithms to achieve quantum advantages in the noisy intermediate-scale quantum (NISQ) era. One important challenge in implementing such algorithms is to construct an effective parameterized quantum circuit (also called an ansatz). In this work, we propose a single entanglement connection architecture (SECA) for a bipartite hardware efficient ansatz (HEA) by balancing its expressibility, entangling capability, and trainability. Numerical simulations with a one-dimensional Heisenberg model and quadratic unconstrained binary optimization (QUBO) issues were conducted. Our results indicate the superiority of SECA over the common full entanglement connection architecture in terms of computational performance. Furthermore, combining SECA with gate-cutting technology to construct distributed quantum computation (DQC) can efficiently expand the size of NISQ devices under low overhead. We also demonstrated the effectiveness and scalability of the DQC scheme. Our study is a useful indication for understanding the characteristics associated with an effective training circuit.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"16 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770821","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

Is the dynamical quantum Cheshire cat detectable? 动态量子柴郡猫可以被探测到吗？

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-24 DOI: 10.1088/1367-2630/ad6476

Jonte R Hance, James Ladyman and John Rarity

引用次数: 0

Active Brownian particle under stochastic orientational resetting 随机方向重设下的主动布朗粒子

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-24 DOI: 10.1088/1367-2630/ad602a

Yanis Baouche, Thomas Franosch, Matthias Meiners and Christina Kurzthaler

引用次数: 0

Active gel model for one-dimensional cell migration coupling actin flow and adhesion dynamics 连接肌动蛋白流动和粘附动力学的一维细胞迁移活性凝胶模型

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-24 DOI: 10.1088/1367-2630/ad63c5

Valentin Wössner, Oliver M Drozdowski, Falko Ziebert and Ulrich S Schwarz

引用次数: 0

Applicability of measurement-based quantum computation towards physically-driven variational quantum eigensolver 基于测量的量子计算在物理驱动的变分量子求解器中的适用性

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-24 DOI: 10.1088/1367-2630/ad634a

Zheng Qin, Xiufan Li, Yang Zhou, Shikun Zhang, Rui Li, Chunxiao Du and Zhisong Xiao

{"title":"Applicability of measurement-based quantum computation towards physically-driven variational quantum eigensolver","authors":"Zheng Qin, Xiufan Li, Yang Zhou, Shikun Zhang, Rui Li, Chunxiao Du and Zhisong Xiao","doi":"10.1088/1367-2630/ad634a","DOIUrl":"https://doi.org/10.1088/1367-2630/ad634a","url":null,"abstract":"Variational quantum algorithms are considered one of the most promising methods for obtaining near-term quantum advantages; however, most of these algorithms are only expressed in the conventional quantum circuit scheme. The roadblock to developing quantum algorithms with the measurement-based quantum computation (MBQC) scheme is resource cost. Recently, we discovered that the realization of multi-qubit rotation operations only requires a constant number of single-qubit measurements with the MBQC scheme, providing a potential advantage in terms of resource cost. The structure of the Hamiltonian variational ansatz aligns well with this characteristic. Thus, we propose an efficient measurement-based quantum algorithm for quantum many-body system simulation tasks, called measurement-based Hamiltonian variational ansatz (MBHVA). We then demonstrate its effectiveness, efficiency, and advantages with the two-dimensional Heisenberg model and the Fermi–Hubbard chain. Numerical experiments show that MBHVA can have similar performance as circuit-based ansatz, and is expected to reduce operation counts during execution compared to quantum circuits, bringing the advantage of running time. We conclude that the MBQC scheme is potentially feasible for achieving near-term quantum advantages in the noisy intermediate-scale quantum era, especially in the presence of large multi-qubit rotation operations.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"31 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770820","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

Interconversion between block coherence and multipartite entanglement in many-body systems 多体系统中块相干与多方纠缠之间的相互转换

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-23 DOI: 10.1088/1367-2630/ad602b

Yu-Hui Wang, Li-Hang Ren, Ming-Liang Hu and Yan-Kui Bai

{"title":"Interconversion between block coherence and multipartite entanglement in many-body systems","authors":"Yu-Hui Wang, Li-Hang Ren, Ming-Liang Hu and Yan-Kui Bai","doi":"10.1088/1367-2630/ad602b","DOIUrl":"https://doi.org/10.1088/1367-2630/ad602b","url":null,"abstract":"Coherence is intrinsically related to projective measurement. When the fixed projective measurement involves higher-rank projectors, the coherence resource is referred to as block coherence, which comes from the superposition of orthogonal subspaces. Here, we establish a set of quantitative relations for the interconversion between block coherence and multipartite entanglement under the framework of the block-incoherent operations. It is found that the converted multipartite entanglement is upper bounded by the initial block coherence of single-party system. Moreover, the generated multipartite entanglement can be transferred to its subsystems and restored to block coherence of the initial single-party system by means of local block-incoherent operations and classical communication. In addition, when only the coarse-grained quantum operations are accessible for the ancillary subsystems, we further demonstrate that a lossless resource interconversion is still realizable, and give a concrete example in three four-level systems. Our results provide a versatile approach to utilize different quantum resources in a cyclic fashion.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"93 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770876","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

Doppler-enhanced quantum magnetometry with thermal Rydberg atoms 多普勒增强量子磁强计与热雷德堡原子

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-22 DOI: 10.1088/1367-2630/ad6179

Shovan Kanti Barik, Silpa B S, M Venkat Ramana, Shovan Dutta and Sanjukta Roy

引用次数: 0

Quasiparticles-mediated thermal diode effect in Weyl Josephson junctions 韦尔-约瑟夫森结中准粒子介导的热二极管效应

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-22 DOI: 10.1088/1367-2630/ad617a

Pritam Chatterjee and Paramita Dutta

引用次数: 0

Quantum optimization algorithm based on multistep quantum computation 基于多步量子计算的量子优化算法

IF 3.3 2区物理与天体物理

New Journal of Physics Pub Date : 2024-07-21 DOI: 10.1088/1367-2630/ad60ed

Hefeng Wang and Hua Xiang

{"title":"Quantum optimization algorithm based on multistep quantum computation","authors":"Hefeng Wang and Hua Xiang","doi":"10.1088/1367-2630/ad60ed","DOIUrl":"https://doi.org/10.1088/1367-2630/ad60ed","url":null,"abstract":"We present a quantum algorithm for finding the minimum of a function based on multistep quantum computation, and apply the algorithm for solving optimization problems with continuous variables. We construct the state space of the problem by discretizing the variables of the problem, and divide the state space according to the function values of the vectors of the state space. By comparing the function values of the vectors with a series of threshold values in decreasing order, we construct a sequence of Hamiltonians where the search space of a Hamiltonian is nested in that of the previous one. By applying a multistep quantum computation process for finding the ground state of the last Hamiltonian, the optimal vector of the state space of the problem is located in a small search space and can be determined efficiently. One of the most difficult problems in optimization algorithms is that a trial vector is trapped in a deep local minimum while the global minimum is missed, this problem can be alleviated in our algorithm and the run time is proportional to the number of the steps of the algorithm, provided that the reduction rate of the search spaces is polynomial large. We discuss the implementation of the algorithm and test the algorithm for some test functions.","PeriodicalId":19181,"journal":{"name":"New Journal of Physics","volume":"61 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141739808","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