Quantum Information Processing最新文献

{"title":"Coherent wave-particle quantum walks","authors":"Rong Zhang,&nbsp;Rusheng Qi,&nbsp;Tianhao Chen,&nbsp;Ping Xu","doi":"10.1007/s11128-025-04777-8","DOIUrl":"10.1007/s11128-025-04777-8","url":null,"abstract":"<div><p>Quantum walks (QWs) can be used as an arena to study the transition between the quantum and classical behaviors in general. We report that the quantum control makes QWs be in a coherent superposition of wave state and particle state with a relative phase between them, which is named as coherent wave-particle (W-P) QWs. Therefore, the continuous transition between the quantum and classical behaviors in both coherent and mixed ways can be achieved, and it is demonstrated by using the position distribution and variance. Further the coherent W-P QWs are implemented and the conceptual findings are confirmed with the IBM quantum computer.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135478","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}

{"title":"Quantum image dataset transform (QIDT) for image processing","authors":"Zorkan Erkan,&nbsp;Javad Rahebi,&nbsp;Aref Yelghi","doi":"10.1007/s11128-025-04754-1","DOIUrl":"10.1007/s11128-025-04754-1","url":null,"abstract":"<div><p>Existing CNN architectures have been developed to train digital image datasets obtained from hardware systems operating with classical bits, such as optical cameras. With the increase of quantum computing algorithms and quantum system providers, academic research is being conducted to combine the strengths of classical computing and quantum algorithms. This fusion allows for the development of hybrid quantum systems, with proposed methods specifically for the quantum representation of digital images. While methods for transforming digital images into quantum-compatible circuits have been proposed, no study has been found on the quantum transformation of entire datasets, especially for the use of fully classical CNN architectures. This article presents the quantum image dataset transform method, which utilizes quantum circuits to transform digital images and create a new dataset of the transformed images. Each of the 10,000 digital images of 28 <span>(times )</span> 28 dimensions in the MNIST handwritten digits dataset is individually sub-parts, and the common weight values of each segment are determined as the phase value to be used in the quantum circuit. The quantum outputs of each sub-part are converted into classical equivalents by creating a quantum converter, and a new digital image is obtained by combining all the sub-parts. The newly generated digital images are labeled as <span>({textbf {MNIST}} {textbf {Q}}^{{textbf {+}}}_{{{textbf {image}}}})</span> and are publicly shared along with the original MNIST dataset. The paper evaluates both a custom 3-layer CNN architecture and several pre-trained models, including EfficientNetV2B3, ResNet-50, DenseNet-121, and ConvNeXt Tiny. After training for 30 epochs, the 3-layer CNN architecture achieved the highest accuracy of 99.23%, significantly outperforming the pre-trained models, with DenseNet-121 achieving 81.70%, EfficientNetV2B3 64.23%, ResNet-50 53.25%, and ConvNeXt Tiny 53.41%. The results highlight the superior performance of the 3-layer CNN in adapting to the quantum-transformed dataset and demonstrate the potential of quantum transformations to enhance the learning ability of classical CNN models. This foundational research aims to pave the way for further exploration into the integration of quantum-transformed datasets in classical deep learning frameworks.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11128-025-04754-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135464","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}

{"title":"Self-testing positive operator-valued measures and certifying randomness","authors":"Wenjie Wang,&nbsp;Mengyan Li,&nbsp;Fenzhuo Guo,&nbsp;Yukun Wang,&nbsp;Fei Gao","doi":"10.1007/s11128-025-04773-y","DOIUrl":"10.1007/s11128-025-04773-y","url":null,"abstract":"<div><p>In the device-independent scenario, positive operator-valued measures (POVMs) can certify more randomness than projective measurements. This paper self-tests a three-outcome extremal qubit POVM in the X-Z plane of the Bloch sphere by achieving the maximal quantum violation of a newly constructed Bell expression <span>(mathcal {C}_3^{'} )</span>, adapted from the chained inequality <span>(mathcal {C}_3)</span>. Using this POVM, approximately 1.58 bits of local randomness can be certified, which is the maximum amount of local randomness achievable by an extremal qubit POVM in this plane. Further modifications of <span>(mathcal {C}_3^{'} )</span> produce <span>(mathcal {C}_3^{''} )</span>, enabling the self-testing of another three-outcome extremal qubit POVM. Together, these POVMs are used to certify about 2.27 bits of global randomness. Both local and global randomness surpass the limitations certified from projective measurements. Additionally, the Navascués-Pironio-Acín hierarchy is employed to compare the lower bounds on global randomness certified by <span>(mathcal {C}_3)</span> and several other inequalities. As the extent of violation increases, <span>(mathcal {C}_3)</span> demonstrates superior performance in randomness certification.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135479","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}

{"title":"Quantum Entanglement and Teleportation Fidelity in Half-filled Hubbard Model of Graphene Honeycomb Lattices","authors":"Hao Wang","doi":"10.1007/s11128-025-04767-w","DOIUrl":"10.1007/s11128-025-04767-w","url":null,"abstract":"<div><p>We present a scheme for the thermal entanglement and teleportation fidelity of two electrons in the half-filled Hubbard model of the graphene honeycomb lattices. The analytical thermal entanglement, the teleportation fidelity and the average teleportation fidelity expressions are obtained. The effects of the temperature, the on-site repulsion and the nearest-neighbor interaction on the Concurrence, the teleportation fidelity and the average teleportation fidelity are discussed in detail. The findings suggest that weaker or stronger values of the on-site repulsion, the nearest-neighbor interaction will diminish quantum correlations and teleportation fidelity in the system. Furthermore, the average fidelity <span>({mathcal {F}}_A )</span> of teleportation using thermal entangled state is confined in the inequality <span>(1 / 4 le {mathcal {F}}_A le 1 / 3)</span>. These investigation have significant implications for quantum physics and its practical applications in quantum information processing.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125516","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}

{"title":"Classical and quantum multiplayer Colonel Blotto game in all-optical setup","authors":"G. Tiago,&nbsp;J. Naskar,&nbsp;A. C. Maioli,&nbsp;W. F. Balthazar,&nbsp;A. G. M. Schmidt,&nbsp;J. A. O. Huguenin","doi":"10.1007/s11128-025-04760-3","DOIUrl":"10.1007/s11128-025-04760-3","url":null,"abstract":"<div><p>Recently, many works have investigated the prominence of quantum games in quantum information scenarios. In this work, we successfully present a theoretical and experimental study for a quantum version of the multiplayer Colonel Blotto game. We find that players with access to the quantum strategies have an advantage over the classical ones. The payoff is invariant under the order of the operator’s strategies. The experimental realization for three players used optical circuits exploring degrees of freedom of light. The quantum-classical analogy of degree of freedom of light and quantum states powered by optical coherence allowed us to experimentally capture the quantum behavior of theoretical predictions.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117635","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}

{"title":"Generation of entanglement in V-shaped plasmonic waveguides by Lyapunov control","authors":"Yi-Jia Zhou,&nbsp;Bai-Yun Zhang,&nbsp;Shuai Liu,&nbsp;Ze-Long He,&nbsp;Ya-dong Li,&nbsp;Sui-Hu Dang,&nbsp;Du Ran","doi":"10.1007/s11128-025-04775-w","DOIUrl":"10.1007/s11128-025-04775-w","url":null,"abstract":"<div><p>In this paper, we propose a scheme for generating bipartite entanglement between two-level coupled atomic systems in V-shaped plasmonic waveguides using Lyapunov control. Two types of control Hamiltonians are employed: a local Hamiltonian requiring individual modulation of control fields and a global Hamiltonian involving uniform modulation. Numerical simulations demonstrate that, in the absence of dissipation, maximal entanglement is achievable, with concurrence reaching unity. The robustness of the scheme is further analyzed in the presence of dissipation and perturbations. Compared to measurement-based feedback control, the proposed method proves more effective in generating the target entanglement. Moreover, the scheme eliminates the need for cumbersome measurement and feedback operations, as the control fields are pre-designed based on the simulation of system dynamics in a feedback form. Thus, the proposed approach may find promising applications in quantum entanglement generation.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117738","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}

{"title":"Dynamics of entanglement in a model consisting of an isolated atom and two Tavis–Cummings atoms with many-photon transitions","authors":"E. K. Bashkirov,&nbsp;A. R. Bagrov","doi":"10.1007/s11128-025-04772-z","DOIUrl":"10.1007/s11128-025-04772-z","url":null,"abstract":"<div><p>We study a model consisting of an isolated two-level atom and two two-level atoms (qubits) trapped in a lossless cavity and resonantly interacting with a single-mode thermal electromagnetic field through many-photon transitions. This system is of significant interest in the field of cavity quantum electrodynamics and quantum information processing and can be realized in superconducting Josephson circuits in coplanar cavities, Rydberg atoms in cavities, etc. We obtained an exact analytical solution for the evolution operator of the considered model. On its basis, we derived the time-dependent density matrixes for initial W- or GHZ-type atomic states and thermal cavity state. With the help of pairwise concurrence and fidelity, we investigated the dynamics of entanglement in the considered model. We showed that in the nonlinear many-photon processes starting from W-type states, the atomic entanglement is stronger than that in the linear one-photon processes. We also obtained for considered initial states that the phenomenon of sudden death of entanglement (ESD) can be eliminated for large photon multiples. We also showed that for the initial GHZ-state the long-lived entangled states for large values of photon multiples can be generated.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125515","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}

{"title":"Error analysis of quantum operators written as a linear combination of permutations","authors":"Ammar Daskin","doi":"10.1007/s11128-025-04771-0","DOIUrl":"10.1007/s11128-025-04771-0","url":null,"abstract":"<div><p>In this paper, we consider matrices given as a linear combination of permutations and analyze the impact of bit and phase flips on the perturbation of the eigenvalues. When the coefficients in the linear combination are positive, we observe that the eigenvalues of the resulting matrices exhibit resilience to quantum bit-flip errors. In addition, we analyze the bit flips in combination with positive and negative coefficients and the phase flips. Although matrices with mixed-sign coefficients show less resilience to the bit-flip and phase-flip errors, the numerical evidence shows that the perturbation of the eigenspectrum is very small when the rate of these errors is small. We also discuss the situation when this matrix is implemented through block encoding and there is a control register. Since any square matrix can be expressed as a linear combination of permutations multiplied by two scaling matrices from the left and right (via Sinkhorn’s theorem), this paper gives a framework to study matrix computations in quantum algorithms related to numerical linear algebra. In addition, it can give ideas to design more error-resilient algorithms that may involve quantum registers with different error characteristics.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11128-025-04771-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108474","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}

{"title":"An Exponential Mixing Condition for Quantum Channels: Application to Matrix Product States","authors":"Abdessatar Souissi,&nbsp;Abdessatar Barhoumi","doi":"10.1007/s11128-025-04762-1","DOIUrl":"10.1007/s11128-025-04762-1","url":null,"abstract":"<div><p>Quantum channels are fundamental tools in quantum information processing, enabling state transformations within quantum systems, secure communication, and error correction. Understanding their ergodic and mixing properties is crucial for characterizing their long-term behavior. In this paper, we establish a sufficient condition for mixing via a quantum Markov–Dobrushin inequality, demonstrating that quantum channels with a positive Markov–Dobrushin constant exhibit exponential convergence to their stationary state. Furthermore, we present a theorem linking mixing quantum channels to the thermodynamic limit of matrix product states (MPS), providing a rigorous foundation for understanding the stability and ergodicity of MPS in infinite quantum systems. To illustrate the applicability of our results, we analyze the qubit depolarizing channel, showcasing its mixing behavior and implications for quantum information tasks.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108476","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}

{"title":"Quantum circuits composition for complex protocols: double-direction cyclic controlled teleportation","authors":"Khaled Khalfaoui,&nbsp;Tahar Boudjedaa","doi":"10.1007/s11128-025-04756-z","DOIUrl":"10.1007/s11128-025-04756-z","url":null,"abstract":"<div><p>Quantum computing is a computational paradigm that has proven efficient in several areas. Despite the progress made in this domain, evolving complex protocols remains a very difficult task. In this paper, we propose to overcome this obstacle by relying on the composition of elementary quantum circuits. The basic idea is to first implement the solution of the same problem for a smaller dimension in the form of a basic protocol. Then, we proceed by combining a set of basic protocols in order to solve the initial problem with necessary adaptations. Our approach is illustrated through elaboration of a double-direction cyclic controlled teleportation protocol. We also show that this protocol allows to provide other functionalities using the same quantum channel. Application examples are presented.</p></div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100148","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}