Quantum Information Processing最新文献_第9页

Uncertainty of quantum channels via generalized Wigner–Yanase skew information

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-24 DOI: 10.1007/s11128-024-04637-x

Jing-Feng Wu, Qing-Hua Zhang, Shao-Ming Fei

引用次数: 0

Error-correctable efficient quantum homomorphic encryption using Calderbank–Shor–Steane codes

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-23 DOI: 10.1007/s11128-025-04651-7

IlKwon Sohn, Boseon Kim, Kwangil Bae, Wooyeong Song, Wonhyuk Lee

引用次数: 0

Steady-state entanglement of two coupled qubits in two independent squeezed thermal reservoirs

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-23 DOI: 10.1007/s11128-025-04654-4

Ze Wang, Jing Nie, Xiuyi Yang, Song-Lin Wu, Xiao-Li Huang

{"title":"Steady-state entanglement of two coupled qubits in two independent squeezed thermal reservoirs","authors":"Ze Wang, Jing Nie, Xiuyi Yang, Song-Lin Wu, Xiao-Li Huang","doi":"10.1007/s11128-025-04654-4","DOIUrl":"10.1007/s11128-025-04654-4","url":null,"abstract":"<div><p>The steady-state entanglement of two mutually coupled qubits (each qubit interacts with its own local squeezed thermal reservoir) is investigated based on the Bloch–Redfield master equation beyond the secular approximation. In equilibrium settings (the temperatures of the two local thermal reservoirs are the same), the squeezing on both sides of the reservoir suppresses the steady-state entanglement. The steady-state entanglement is a nonmonotonic function with respect to the reservoir temperature in the equilibrium setting. Moreover, entanglement is suppressed under both squeezed vacuum reservoir and high-temperature thermal reservoir conditions irrespective of the value of the squeeze parameter. On the other hand, in non-equilibrium settings (the temperatures of the two local thermal reservoirs differ), asymmetrical squeezing significantly enhances the steady-state entanglement, which leads to higher maxima compared to the equilibrium scenarios. The temperature difference of the two reservoirs is found to be beneficial to the enhancement of the entanglement when the temperature of the high-temperature reservoir is fixed. The variations in effective temperature and eigenstate populations of the two-qubit system with respect to the squeeze parameter are also studied.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108893","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

Improving Gaussian process with quantum kernel estimation

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-23 DOI: 10.1007/s11128-024-04642-0

Xiaojian Zhou, Qi Cui, Meng Zhang, Ting Jiang

{"title":"Improving Gaussian process with quantum kernel estimation","authors":"Xiaojian Zhou, Qi Cui, Meng Zhang, Ting Jiang","doi":"10.1007/s11128-024-04642-0","DOIUrl":"10.1007/s11128-024-04642-0","url":null,"abstract":"<div><p>Gaussian process (GP), as a pivotal offshoot of machine learning (ML), has garnered significant attention in recent years due to its exceptional advantages in tackling high-dimensional and nonlinear regression quandaries. However, when confronted with large-scale datasets, the classical GP model often encounters dual challenges of modeling speed and prediction accuracy. To effectively tackle these challenges, we consider introducing the quantum kernel estimation (QKE) method into the implementation of the classical GP, and we propose a quantum kernel estimation-based Gaussian process (QKE-GP) model. The proposed QKE-GP model employs a quantum feature map (QFM) circuit containing two suitable variational parameters to generate the trainable quantum kernel. Moreover, we utilize the quantum gradient descent (QGD) optimization algorithm to bolster the expressive capacity of the trainable quantum kernel, thus improving the prediction accuracy of model when dealing with large-scale datasets. Following this, we utilize the trained quantum kernel to replace the classical kernel function within the GP model, obtaining the quantum version of the GP model for predicting new data points. To validate the effectiveness of the proposed model, three numerical experiments are carried out in this study. The findings demonstrate that the prediction accuracy of the QKE-GP model outperforms that of the classical GP model in all three scenarios.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108894","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

Relationship between fidelity and spin squeezing parameter in a two-qutrit system under nonlinear Hamiltonians 非线性哈密顿量下双量子位系统保真度与自旋压缩参数的关系

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-13 DOI: 10.1007/s11128-024-04641-1

Azita Naji

引用次数: 0

Detection of entanglement via moments of positive maps 通过正映射矩检测纠缠

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-13 DOI: 10.1007/s11128-025-04653-5

Mazhar Ali

引用次数: 0

Implementing direct three-tangle measurement of tripartite GHZ states on IBM quantum platforms 在IBM量子平台上实现三方GHZ状态的直接三缠结测量

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-13 DOI: 10.1007/s11128-024-04635-z

Seyed Navid Elyasi, Marziyeh Yahyavi, Naser Karimi

{"title":"Implementing direct three-tangle measurement of tripartite GHZ states on IBM quantum platforms","authors":"Seyed Navid Elyasi, Marziyeh Yahyavi, Naser Karimi","doi":"10.1007/s11128-024-04635-z","DOIUrl":"10.1007/s11128-024-04635-z","url":null,"abstract":"<div><p>Among the various quantum phenomena that contribute to the efficiency of quantum computation compared to classical computation, entanglement plays a pivotal role. To witness and measure entanglement, various approaches such as concurrence for bipartite systems and tangle for three-qubit entangled systems have been developed. In this regard, researchers have endeavored to design algorithms capable of directly measuring these parameters to enhance efficiency and feasibility in computation. This topic has garnered significant attention due to its importance in the experimental implementation of desired quantum computations. While theoretical proposals are respected and have generated many unique ideas, experimental implementation can provide invaluable insights. To achieve this goal, IBM quantum platforms, available in cloud form, serve as unique testbeds for scrutinizing theoretical algorithms performed on these devices, which simulate artificial atoms using different technologies like low-capacitance Josephson junctions. In this paper, we propose a new algorithm capable of directly measuring the three-tangle in tripartite GHZ states. To assess the reliability of our algorithm, we ran experiments by executing the circuit on three IBM backends featuring 127 qubits, deliberately selecting qubits with the lowest readout error. Despite the NISQ nature of the IBM quantum platforms, the results indicate the precision of our proposed protocol. This research introduces a valuable protocol, alongside its experimental proof, to measure three-tangle without using tomography and intensive numerical optimization methods to calculate three-tangle.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963155","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

Heisenberg-limited Kerr phase estimation with coherent and squeezed vacuum states 相干和压缩真空状态下的海森堡有限克尔相位估计

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-11 DOI: 10.1007/s11128-025-04644-6

Jian-Dong Zhang, Lili Hou, Shuai Wang

引用次数: 0

Quantum information resources in spin-1 Heisenberg dimer systems 自旋-1海森堡二聚体体系中的量子信息资源

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-10 DOI: 10.1007/s11128-024-04631-3

Fadwa Benabdallah, M. Y. Abd-Rabbou, Mohammed Daoud, Saeed Haddadi

{"title":"Quantum information resources in spin-1 Heisenberg dimer systems","authors":"Fadwa Benabdallah, M. Y. Abd-Rabbou, Mohammed Daoud, Saeed Haddadi","doi":"10.1007/s11128-024-04631-3","DOIUrl":"10.1007/s11128-024-04631-3","url":null,"abstract":"<div><p>We explore the quantum information resources within bipartite pure and mixed states of the quantum spin-1 Heisenberg dimer system, considering some interesting factors such as the <span>(l_{1})</span>-norm of quantum coherence, relative coherence, negativity, and steering, influenced by the magnetic field and uniaxial single-ion anisotropy. Through a thorough investigation, we derive the system’s density operator at thermal equilibrium and establish a mathematical framework for analyzing quantum resource metrics. Our results unveil the system’s behavior at absolute zero temperature. We further observe temperature’s role in transitioning the system toward classical states, impacting coherence, entanglement, and steering differently. Notably, we find that increasing the exchange anisotropy parameter can reinforce quantum correlations, while adjusting the uniaxial single-ion anisotropy influences the system’s quantumness, particularly when it is positive. Some recommendations to maximize quantum coherence, entanglement, and steering involve temperature reduction, increasing the exchange anisotropy parameter and carefully managing the magnetic field and uniaxial single-ion anisotropy parameter, highlighting the intricate interplay between these factors in maintaining the system’s quantum properties.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939418","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

Sharing tripartite nonlocality sequentially using only projective measurements 仅使用射影测量共享三部非定域序列

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-01-10 DOI: 10.1007/s11128-024-04638-w

Yiyang Xu, Hao Sun, Fenzhuo Guo, Haifeng Dong, Qiaoyan Wen

{"title":"Sharing tripartite nonlocality sequentially using only projective measurements","authors":"Yiyang Xu, Hao Sun, Fenzhuo Guo, Haifeng Dong, Qiaoyan Wen","doi":"10.1007/s11128-024-04638-w","DOIUrl":"10.1007/s11128-024-04638-w","url":null,"abstract":"<div><p>Bell nonlocality is a valuable resource in quantum information processing tasks. Scientists are interested in whether a single entangled state can generate a long sequence of nonlocal correlations. Previous work has accomplished sequential tripartite nonlocality sharing through unsharp measurements. In this paper, we investigate the sharing of tripartite nonlocality using only projective measurements and sharing classical randomness. For the generalized GHZ state, we have demonstrated that using unbiased measurement choices, two Charlies can share the standard tripartite nonlocality with a single Alice and a single Bob, while at most one Charlie can share the genuine tripartite nonlocality with a single Alice and a single Bob. However, with biased measurement choices, the number of Charlies sharing the genuine tripartite nonlocality can be increased to two. Nonetheless, we find that using biased measurements does not increase the number of sequential observers sharing the standard tripartite nonlocality. Moreover, we provide the feasible range of double violation for the parameters of the measurement combination probability with respect to the state.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939416","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