Laser Physics Letters最新文献

Vectorial manipulation of twisted vector vortex optical fields in strongly nonlocal nonlinear media 强非局部非线性介质中扭曲矢量涡旋光场的矢量操纵

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-16 DOI: 10.1088/1612-202x/ad7245

Cai-xia Liu, Xiao-bo Hu, Feng-min Wu and Rui-Pin Chen

{"title":"Vectorial manipulation of twisted vector vortex optical fields in strongly nonlocal nonlinear media","authors":"Cai-xia Liu, Xiao-bo Hu, Feng-min Wu and Rui-Pin Chen","doi":"10.1088/1612-202x/ad7245","DOIUrl":"https://doi.org/10.1088/1612-202x/ad7245","url":null,"abstract":"We theoretically investigate the propagation properties and vectorial manipulation of twisted vector vortex beams (TVVB) with a cross-phase in a strongly nonlocal nonlinear medium (SNNM). The root mean square beam-width (RMS-BW) and the critical power required to retain the invariant RMS-BM of the TVVB in an SNNM are derived using the coupled nonlocal nonlinear Schrödinger equation. Numerical calculations reveal novel characteristics of the evolution of the state of polarization (SoP) and the optical intensity distributions during the TVVB propagating in an SNNM. It is found that mode conversions between a Laguerre Gaussian and a Hermite Gaussian mode take place during propagation in an SNNM, and the topological charge of the TVVB can be accurately measured by observing the interference intensity structure in the cross-section. Manipulation of the beam shape, SoP, and rotation of the TVVB is achieved by controlling factors such as the initial power, twisting coefficient, initial beam-width, and topological charge. These findings hold promise for applications in optical micro-manipulation, optical communication, and material processing.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142255233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Quantum metamaterials with complete graph interfaces in the ultrastrong coupling regime 超强耦合机制下具有完整图形界面的量子超材料

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-15 DOI: 10.1088/1612-202x/ad6e6c

P V Zacharenko, D V Tsarev, M M Nikitina and A P Alodjants

引用次数: 0

Picosecond laser with Yb-doped tapered low birefringent double clad fiber 使用掺镱锥形低双折射双包层光纤的皮秒激光器

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-15 DOI: 10.1088/1612-202x/ad72d7

A S Kozlov, A V Mayzel, A V Medvedev, E A Motorin, E A Savelyev, V S Temkina, V N Filippov and Y K Chamorovskiy

引用次数: 0

A quantum identity authentication protocol based on continuous-variable entangled light fields 基于连续可变纠缠光场的量子身份验证协议

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-15 DOI: 10.1088/1612-202x/ad771d

Zhipeng Chen, Fengwei Yao and Xiao-Qi Xiao

引用次数: 0

Classical driving-assisted quantum evolution speedup 经典驱动辅助量子进化加速

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-15 DOI: 10.1088/1612-202x/ad771b

Hu-ping Peng, Zhi-guang Tan, Hai-jie Peng and You-neng Guo

引用次数: 0

Visualizing the quantum phase transition by using quantum steering ellipsoids in the anisotropic spin XY model 在各向异性自旋 XY 模型中利用量子转向椭球使量子相变可视化

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-15 DOI: 10.1088/1612-202x/ad771e

Cheng-Cheng Liu, Ze-Wei Sun, Xiao-Gang Fan, Zhi-Yong Ding, Ze-Qing Guo, Ming-Ming Du, Juan He, Tao Wu and Liu Ye

{"title":"Visualizing the quantum phase transition by using quantum steering ellipsoids in the anisotropic spin XY model","authors":"Cheng-Cheng Liu, Ze-Wei Sun, Xiao-Gang Fan, Zhi-Yong Ding, Ze-Qing Guo, Ming-Ming Du, Juan He, Tao Wu and Liu Ye","doi":"10.1088/1612-202x/ad771e","DOIUrl":"https://doi.org/10.1088/1612-202x/ad771e","url":null,"abstract":"Quantum steering ellipsoids (QSEs) can serve as a useful geometric tool for describing both the strength and type of quantum correlations between two subsystems of a compound system. By employing the quantum renormalization-group method, we focus on investigating the relation between QSEs and the quantum phase transition (QPT) in the anisotropic spin XY model. The results indicate that the QPT is well visualized in terms of the shape of the QSE, i.e. it is an oblate spheroid in the spin-fluid phase and a needle in the Néel phase. Meanwhile, after several iterations of renormalization, the QSE volume V undergoes a contraction mutation, and can develop two saturated values at the critical points associated with the QPT, which correspond to two different phases: the spin-fluid phase and the Néel phase. We also find that the QSE is closely associated with quantum entanglement in the model, i.e. the volume of the QSE between blocks is more than 4π/81 when the system is in the spin-fluid phase, which indicates that the system must be entangled. Furthermore, the nonanalytic and scaling behaviors of the volume of the QSE have been analyzed in detail, and the results convince us that the quantum critical properties are connected with the behavior of the QSE.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142255239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Optimized generalized monogamy relations and upper bounds for N-qubit systems N 量子比特系统的优化广义一性关系和上限

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-11 DOI: 10.1088/1612-202x/ad771c

Zhong-Xi Shen, Dong-Ping Xuan, Wen Zhou, Zhi-Xi Wang and Shao-Ming Fei

引用次数: 0

Quantum state classification via complex-valued neural networks 通过复值神经网络进行量子态分类

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-06 DOI: 10.1088/1612-202x/ad7246

Yu-Chao Dong, Xi-Kun Li, Ming Yang, Yan Lu, Yan-Lin Liao, Arif Ullah, Zhi Lin

{"title":"Quantum state classification via complex-valued neural networks","authors":"Yu-Chao Dong, Xi-Kun Li, Ming Yang, Yan Lu, Yan-Lin Liao, Arif Ullah, Zhi Lin","doi":"10.1088/1612-202x/ad7246","DOIUrl":"https://doi.org/10.1088/1612-202x/ad7246","url":null,"abstract":"To efficiently complete quantum information processing tasks, quantum neural networks (QNNs) should be introduced rather than the common classical neural networks, but the QNNs in the current noisy intermediate-scale quantum era cannot perform better than classical neural networks because of scale and the efficiency limits. So if the quantum properties can be introduced into classical neural networks, more efficient classical neural networks may be constructed for tasks in the field of quantum information. Complex numbers play an indispensable role in the standard quantum theory, and constitute an important feature in quantum theory. So if complex numbers are introduced in classical neural networks, they may outperform the common classical neural networks in dealing with the tasks in the quantum information field. In this paper, we verify this conjecture by studying quantum state classification via complex-valued neural networks (CVNNs). The numerical results show that the performance of CVNNs is much better than the real-valued neural network in classifying the entangled states. Our results not only provide a new way to improve the performance of artificial neural networks in quantum state classifiers, but also might shed light on the study of CVNNs in the field of other quantum information processing tasks before the appearance of the universal quantum computer.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Semiquantum private comparison based on Bell states without quantum measurements from the classical user 基于贝尔态的半量子私密比较，无需经典用户进行量子测量

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-09-04 DOI: 10.1088/1612-202x/ad72de

Mao-Jie Geng, Xia Li, Tian-Yu Ye

引用次数: 0

Tighter uncertainty relations based on Wigner–Yanase skew information for N quantum channels 基于 Wigner-Yanase 偏斜信息的 N 量子信道的更严格不确定性关系

IF 1.7 4区物理与天体物理

Laser Physics Letters Pub Date : 2024-08-30 DOI: 10.1088/1612-202x/ad7252

Quan Zhang, Xu Zheng, Qiong Guo

引用次数: 0