Quantum Information Processing最新文献_第2页

Nonlocality in the alternating Heisenberg–Ising spin chain: effects of coupling, magnetic field, and temperature 交替海森堡-伊辛自旋链中的非定域性：耦合、磁场和温度的影响

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-15 DOI: 10.1007/s11128-025-04730-9

Jia Bao, Haoran Yan, Fangying Song, Bin Guo, Zhaoyu Sun

{"title":"Nonlocality in the alternating Heisenberg–Ising spin chain: effects of coupling, magnetic field, and temperature","authors":"Jia Bao, Haoran Yan, Fangying Song, Bin Guo, Zhaoyu Sun","doi":"10.1007/s11128-025-04730-9","DOIUrl":"10.1007/s11128-025-04730-9","url":null,"abstract":"<div>We explore bipartite and multipartite nonlocality in the alternating Heisenberg–Ising spin chain model, emphasizing the contrasting and complementary roles of the relative coupling strength (lambda ) (the ratio of the Ising interaction to the Heisenberg interaction), the external magnetic field h, and the temperature T. Bipartite nonlocality is evaluated using the CHSH inequality, and multipartite nonlocality is assessed through Bell-type inequalities derived from g-grouping model theory. Our results show that (lambda ), h, and T significantly affect nonlocality in distinct ways. Increasing (lambda ) suppresses bipartite nonlocality but enhances multipartite nonlocality, highlighting the interaction-specific roles in the system: The Heisenberg interaction primarily governs bipartite nonlocal correlations, whereas the Ising interaction drives multipartite nonlocal correlations. In contrast, both h and T universally suppress bipartite and multipartite nonlocal correlations, irrespective of the interaction type. We also reveal scaling behaviors of nonlocality near the quantum critical points, denoted as (lambda _{c}), where both bipartite and multipartite nonlocality exhibit clear signatures in their first derivatives. Critical scaling is described by (lambda _{c}(N) = lambda _{c}(infty )-aN^{-b}), allowing precise determination of the critical value (lambda _{c}(infty ) = 2) in the thermodynamic limit.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Dot-Enabled quantum key distribution for secure communication channels 用于安全通信信道的量子点量子密钥分发

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-10 DOI: 10.1007/s11128-025-04698-6

Hala Hashim Alhashim

{"title":"Quantum Dot-Enabled quantum key distribution for secure communication channels","authors":"Hala Hashim Alhashim","doi":"10.1007/s11128-025-04698-6","DOIUrl":"10.1007/s11128-025-04698-6","url":null,"abstract":"<div>Quantum Dot-Enabled Quantum Key Distribution (QKD) has emerged as a promising approach for establishing secure communication channels, leveraging the unique properties of quantum dots to enhance security and efficiency. In this study, we thoroughly investigated the implementation and performance of a novel QKD protocol incorporating quantum dot technology. Our primary objective was to evaluate the efficacy of the proposed protocol in enhancing secure communication channels by analyzing key performance metrics such as key generation rates, quantum bit error rates (QBER), system efficiency, and security levels. We designed and implemented three distinct scenarios to achieve this objective: basic QKD protocol implementation, QKD protocol with enhanced error correction, and QKD protocol with improved photon detection. Through rigorous experimentation and analysis, we observed significant improvements in key generation rates and reductions in QBER when advanced techniques, such as enhanced error correction and improved photon detection, were employed. Specifically, integrating advanced error correction techniques and enhanced photon detection mechanisms led to higher key generation rates and lower QBER, ultimately enhancing the overall efficiency of secure communication channels. However, our study also identified several limitations and challenges, including the complexity and cost of implementing advanced photon detection technologies. Addressing these challenges will be crucial for realizing the full potential of Quantum Dot-Enabled Quantum Key Distribution in real-world applications. In conclusion, our study provides valuable insights into the feasibility and efficacy of Quantum Dot-Enabled Quantum Key Distribution for secure communication channels. This study contributes to the ongoing efforts to develop advanced quantum communication systems with enhanced security and efficiency by highlighting the key findings, limitations, and future research directions.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A graph-theoretical framework to analyze zero discord quantum states 零不谐量子态分析的图论框架

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-09 DOI: 10.1007/s11128-025-04722-9

Anoopa Joshi, Parvinder Singh, Atul Kumar

引用次数: 0

Quantum correlations in general qubit–qudit axially symmetric states 一般量子位-量子位轴对称态的量子相关

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-07 DOI: 10.1007/s11128-025-04719-4

Saeed Haddadi, Elena I. Kuznetsova, M. A. Yurischev

{"title":"Quantum correlations in general qubit–qudit axially symmetric states","authors":"Saeed Haddadi, Elena I. Kuznetsova, M. A. Yurischev","doi":"10.1007/s11128-025-04719-4","DOIUrl":"10.1007/s11128-025-04719-4","url":null,"abstract":"<div>The development and improvement of analytical methods for evaluating nonclassical correlations is one of the most important tasks in quantum information science. In this paper, we investigate a mixed spin-(1/2, S) system with an arbitrary spin S, where the interactions satisfy the U(1) axial symmetry. Analytical formulas for the local quantum uncertainty (LQU) and local quantum Fisher information (LQFI) are derived directly from the elements and eigenvalues of the density matrix. These results are then used to conduct a comparative analysis of the discord-like quantum correlations, LQU and LQFI, in the system at thermal equilibrium. The high-temperature asymptotics of both quantum correlations are found explicitly. Despite the destructive role of temperature in general, the calculations show that the quantum correlations can increase with temperature in local intervals. Under certain conditions, temperature even generates quantum correlations from uncorrelated ground states. Further, as the system cools, quantum correlations can undergo a series of abrupt transitions with a smooth temperature change. These phenomena are demonstrated for different choices of coupling parameters and spin lengths S.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Comparative investigation of quantum and classical kernel functions applied in support vector machine algorithms 量子核函数与经典核函数在支持向量机算法中的比较研究

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-07 DOI: 10.1007/s11128-025-04728-3

Ghada Abdulsalam, Irfan Ahmad

{"title":"Comparative investigation of quantum and classical kernel functions applied in support vector machine algorithms","authors":"Ghada Abdulsalam, Irfan Ahmad","doi":"10.1007/s11128-025-04728-3","DOIUrl":"10.1007/s11128-025-04728-3","url":null,"abstract":"<div>Quantum kernels in modern computational paradigms present a revolutionary approach to machine learning by harnessing the power of quantum mechanics to redefine how data is processed and analysed. This study examines the performance and applicability of quantum kernels in machine learning models by investigating their potential among different tasks and datasets against classical kernels. The study utilized the radial basis function (RBF), linear, polynomial, and sigmoid classical kernel functions besides quantum kernel and fidelity state vector quantum kernels. The classical support vector classifier (SVC) and quantum support vector classifier (QSVC) with classical and quantum kernels were employed to perform classification tasks on different datasets, namely Cleveland, Framingham, CHSL, Glass Identification, Obesity, and Academic Success. Additionally, support vector regressor (SVR) and quantum support vector regressor (QSVR), employing classical and quantum kernels, were applied for regression tasks using Concrete, Abalone, Aquatic Toxicity, Auto MPG, and Auction Verification datasets. The results of the study provided insights into the performance of quantum kernels when applied to both classical and quantum SVM models regarding classification and regression tasks. In classification tasks, the quantum kernels provided significant competitiveness in terms of accuracy, precision, recall, and F1 measure scores when compared to the classical kernels. Moreover, the quantum kernels have demonstrated promising outcomes in regression tasks, outperforming the classical kernels by achieving less mean squared error (MSE), mean absolute error (MAE), and superior R-squared scores.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 quantum fisher information and quantum phase transitions in the XY spin-1/2 chain 局域量子费雪信息和XY自旋-1/2链中的量子相变

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-05 DOI: 10.1007/s11128-025-04726-5

Xiao-Dong Tan, Yu Shi, Ru Hou

{"title":"Local quantum fisher information and quantum phase transitions in the XY spin-1/2 chain","authors":"Xiao-Dong Tan, Yu Shi, Ru Hou","doi":"10.1007/s11128-025-04726-5","DOIUrl":"10.1007/s11128-025-04726-5","url":null,"abstract":"<div>We study the local quantum Fisher information (LQFI) of arbitrary two-qubit states for the anisotropic XY spin-1/2 chain in a transverse field h at finite temperature T. The results show that LQFI for the states of the nearest-neighbor and the next-nearest-neighbor spin pairs can clearly spotlight the critical point (CP)(gamma) = 0 of a quantum phase transition (QPT) in this model even at finite T, due to the discontinuity of the first derivative of LQFI at (gamma) = 0 ((gamma) is the anisotropy parameter). Moreover, LQFI can successfully detect another QPT point h = 1 at T = 0, due to the divergence of the first derivative of LQFI at h = 1 if (left| gamma right| ne 1). When (left| gamma right| = 1), the CP h = 1 can be also clearly detected by LQFI at T > 0. Besides, LQFI can pick out the special points (not the CPs), where LQFI always displays a cusp-like behavior. At some proper values of (gamma) and h, LQFI can increase with increasing T as well. These remarkable properties suggest that LQFI could serve as an useful tool for experimentally detecting the CPs of QPTs in spin systems at finite T.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A Laplacian-based quantum graph neural networks for quantum semi-supervised learning 用于量子半监督学习的基于拉普拉斯的量子图神经网络

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-03 DOI: 10.1007/s11128-025-04725-6

Hamed Gholipour, Farid Bozorgnia, Kailash Hambarde, Hamzeh Mohammadigheymasi, Javier Mancilla, Andre Sequeira, João Neves, Hugo Proença, Moharram Challenger

{"title":"A Laplacian-based quantum graph neural networks for quantum semi-supervised learning","authors":"Hamed Gholipour, Farid Bozorgnia, Kailash Hambarde, Hamzeh Mohammadigheymasi, Javier Mancilla, Andre Sequeira, João Neves, Hugo Proença, Moharram Challenger","doi":"10.1007/s11128-025-04725-6","DOIUrl":"10.1007/s11128-025-04725-6","url":null,"abstract":"<div>The Laplacian learning method has proven effective in classical graph-based semi-supervised learning, yet its quantum counterpart remains underexplored. This study systematically evaluates the Laplacian-based quantum semi-supervised learning (QSSL) approach across four benchmark datasets—Iris, Wine, Breast Cancer Wisconsin, and Heart Disease. By experimenting with varying qubit counts and entangling layers, we demonstrate that increased quantum resources do not necessarily lead to improved performance. Our findings reveal that the effectiveness of the method is highly sensitive to dataset characteristics, as well as the number of entangling layers. Optimal configurations, generally featuring moderate entanglement, strike a balance between model complexity and generalization. These results emphasize the importance of dataset-specific hyperparameter tuning in quantum semi-supervised learning frameworks.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11128-025-04725-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unconditional robustness of multipartite entanglement of superposition 多部纠缠叠加的无条件鲁棒性

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-03 DOI: 10.1007/s11128-025-04720-x

Hui-Hui Qin, Shao-Shuai Zhao, Shao-Ming Fei

引用次数: 0

Multi-party authenticated quantum key agreement protocol based on d-level single-particle states 基于d级单粒子态的多方认证量子密钥协议

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-02 DOI: 10.1007/s11128-025-04723-8

Mengqing Yang, Hao Cao, Zepeng Zhuo, Binbin Gan, Chunxia Wang

引用次数: 0

Locally distinguishing nonlocal orthogonal product states with entanglement as a universal auxiliary resource 用纠缠作为通用辅助资源局部区分非局部正交积态

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-01 DOI: 10.1007/s11128-025-04727-4

Tian-Qing Cao, Bo-Hui Gao, Qiao-Ling Xin, Lu Zhao

{"title":"Locally distinguishing nonlocal orthogonal product states with entanglement as a universal auxiliary resource","authors":"Tian-Qing Cao, Bo-Hui Gao, Qiao-Ling Xin, Lu Zhao","doi":"10.1007/s11128-025-04727-4","DOIUrl":"10.1007/s11128-025-04727-4","url":null,"abstract":"<div>Recently, three classes of orthogonal product states in (mathbb {C}^motimes mathbb {C}^n(mge 3, nge 3)) which cannot be exactly discriminated by local operations and classical communication (LOCC) have been constructed, respectively, by Xu et al. (Quantum Inf. Process. 20: 128, 2021) and Zhu et al. (Physica A 624: 128956, 2023). However, it is interesting to know, in order to perfectly distinguish these states by LOCC, how much entanglement resources are sufficient and/or necessary and whether it is possible to find a universal auxiliary resource. In this paper, we present that by using only one two-qubit maximally entangled state as a general auxiliary resource, the above locally indistinguishable states can all be perfectly identified by LOCC. And the general process of auxiliary local discrimination using entanglement is discussed in detail. The local distinguishing protocols we designed not only utilize minimal amount of assisted entanglement, but also show that the strength of these nonlocal sets is minimal from the point of view of auxiliary resources.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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