Quantum Information Processing最新文献

Local quantum fisher information and quantum phase transitions in the XY spin-1/2 chain

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

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

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

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

Influence of joint measurement bases on sharing network nonlocality

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-01 DOI: 10.1007/s11128-025-04715-8

Amit Kundu, Debasis Sarkar

{"title":"Influence of joint measurement bases on sharing network nonlocality","authors":"Amit Kundu, Debasis Sarkar","doi":"10.1007/s11128-025-04715-8","DOIUrl":"10.1007/s11128-025-04715-8","url":null,"abstract":"<div>Sharing network nonlocality in an extended quantum network scenario is the new paradigm in the development of quantum theory. Here, we investigate the role of elegant joint measurement (usually referred, EJM) bases within an extended bilocal framework for sharing network nonlocality through sequential measurement protocols. The work is essentially based on the newly introduced (Tavakoli in Phys Rev Lett 126:220401, 2021) bilocal inequality with ternary inputs for end parties and EJM as joint measurement bases in (hbox {Alice}_n-{Bob}-{Charlie}_m) scenario. Here, we are able to capture all simultaneous violations of this inequality for ((n,m)in {(2,1),(1,2),(1,1),(2,2)}) cases. We also observe the criteria for sharing network nonlocality where we find the dependence of the sharing on the amount of entanglement of the joint bases. Furthermore, we capture the implications of nonlinear inequality structures, revealing both symmetrical and asymmetrical violation patterns within this extended configuration. This investigation advances towards both the theoretical formalism and experimental implementation to characterize quantum correlation in complex network structures, thereby it will contribute to the foundational understanding of distributed quantum resources with their information-theoretic constraints.\u0000</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":"143740657","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

Locally distinguishing nonlocal orthogonal product states with entanglement as a universal auxiliary resource

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

Non-Markovian dynamics of open quantum systems in squeezed thermal baths

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-01 DOI: 10.1007/s11128-025-04721-w

Arapat Ablimit, Ahmad Abliz, Yu-Sui Chen, Zhao-Ming Wang

{"title":"Non-Markovian dynamics of open quantum systems in squeezed thermal baths","authors":"Arapat Ablimit, Ahmad Abliz, Yu-Sui Chen, Zhao-Ming Wang","doi":"10.1007/s11128-025-04721-w","DOIUrl":"10.1007/s11128-025-04721-w","url":null,"abstract":"<div>The quantum state diffusion (QSD) equation technique has been used to effectively deal with the dynamics of the open quantum systems. Normally, the initial states of the baths are taken as vacuum states. In this paper, we use the squeezed vacuum states of the baths as the initial states. Then, the squeezing parameters are naturally introduced to the non-Markovian dynamics of the system. By using the QSD equation technique, a non-Markovian master equation in squeezed thermal baths has been derived under the weak system-bath coupling, high-temperature approximation. The dynamics of the systems can be numerically calculated by the master equation together with a group of closed (overline{O})((overline{Q})) operator equation. Taking a single and two-qubit coupled with the squeezed bath as examples, the dynamics of the spin state (leftlangle sigma _{z}rightrangle ) or correlation (leftlangle sigma _{z}^{A}sigma _{z}^{B}rightrangle ) are numerically calculated. The effects of the squeezing and memory effects on the dynamics are analyzed. For both models, big p-quadrature squeezing or long memory time (strong non-Markovianity) of the baths corresponds to big values of (leftlangle sigma _{z}rightrangle ) or (leftlangle sigma _{z}^{A}sigma _{z}^{B}rightrangle ). When the squeezing strength is zero, the correlation functions go back to the vacuum initial state cases. The developed technique in this paper provides an effective approach to analyze the impact of multiple parameters on the systems in squeezed thermal baths.</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":"143740658","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

Locally distinguishing genuinely nonlocal sets with one GHZ state

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-03-26 DOI: 10.1007/s11128-025-04718-5

Su-Juan Zhang, Qiao Qiao, Chen-Ming Bai

{"title":"Locally distinguishing genuinely nonlocal sets with one GHZ state","authors":"Su-Juan Zhang, Qiao Qiao, Chen-Ming Bai","doi":"10.1007/s11128-025-04718-5","DOIUrl":"10.1007/s11128-025-04718-5","url":null,"abstract":"<div>A set of multipartite orthogonal product states is deemed genuinely nonlocal if it is locally indistinguishable under any bipartition of the subsystems. The proposal of genuine nonlocality makes many people interested in the construction of genuinely nonlocal sets. However, less attention has been paid to the entanglement-assisted discrimination of genuinely nonlocal sets in multipartite systems. In this paper, we first construct genuinely nonlocal product states in (mathbb {C}^4otimes mathbb {C}^4otimes mathbb {C}^4) and (mathbb {C}^{m+2}otimes (mathbb {C}^4)^{otimes {m}}) with a set of nonlocal product states in (mathbb {C}^3otimes mathbb {C}^4). Second, we generalize the dimension of the system to arbitrary and construct genuinely nonlocal product states in (mathbb {C}^{n+1}otimes mathbb {C}^lotimes mathbb {C}^l) and (mathbb {C}^{m+n-1}otimes (mathbb {C}^l)^{otimes {m}}) using a set of nonlocal product states in (mathbb {C}^notimes mathbb {C}^l,3le nle l). More importantly, we achieve a perfect discrimination for the constructed genuinely nonlocal set with only one GHZ state as a resource. From the perspective of the amount of entangled resources, our discrimination protocol is highly efficient. And the Hilbert space in which the entanglement resource we use lies has the minimum dimension, so the set of product states we construct have the minimum genuine nonlocality.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698681","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

Improved belief propagation decoding algorithm based on decoupling representation of Pauli operators for quantum stabilizer codes

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-03-25 DOI: 10.1007/s11128-025-04709-6

Zhengzhong Yi, Zhipeng Liang, Jiahan Chen, Kaixin Zhong, Yulin Wu, Zhou Fang, Xuan Wang

引用次数: 0

Characterization of non-adaptive Clifford channels

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-03-24 DOI: 10.1007/s11128-025-04682-0

Vsevolod I. Yashin, Maria A. Elovenkova

引用次数: 0