EPJ Quantum Technology最新文献

Building Europe’s quantum technology education community 打造欧洲量子技术教育界

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-26 DOI: 10.1140/epjqt/s40507-025-00362-1

Simon Goorney, Eleni Karydi, Jacob Sherson

{"title":"Building Europe’s quantum technology education community","authors":"Simon Goorney, Eleni Karydi, Jacob Sherson","doi":"10.1140/epjqt/s40507-025-00362-1","DOIUrl":"10.1140/epjqt/s40507-025-00362-1","url":null,"abstract":"<div><p>In this article, we investigate the development of the European field of Quantum Technology education, by drawing on the framework of activity theory (AT), most frequently employed in the social sciences. Focusing on the QTEdu CSA, an impactful European project intended to unite stakeholders in QT education, we study the evolution of 11 pilot projects, cross-cutting education for members of the public, high schools, universities, and industry. The pilots are modelled as activities, drawing on data from 402 online profiles, 33 written reports, and 13 interviews conducted with pilot coordinators and members. Through identifying their elements in the language of activity theory, we examine the structure of the community, and the interactions between the individuals, which may have contributed to the development of QT education in Europe. To do so, we use activity theoretic concepts such as contradiction and expansive learning, offering a practical explanation for using AT to model communities, such that it may benefit future research studying community-based transformations in STEM education.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00362-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Fast quantum dialogue 快速量子对话

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-26 DOI: 10.1140/epjqt/s40507-025-00366-x

Yan-Feng Lang, Cheng-Cheng Cai

{"title":"Fast quantum dialogue","authors":"Yan-Feng Lang, Cheng-Cheng Cai","doi":"10.1140/epjqt/s40507-025-00366-x","DOIUrl":"10.1140/epjqt/s40507-025-00366-x","url":null,"abstract":"<div><p>Quantum dialogue (QD) is a term of quantum cryptography, which can fulfill the secure exchange of two parties’ private information in an open environment. Up to now, there have been a lot of QD protocols. Many have several common components and activities, such as encoding photons coming forth with auxiliary photons and back, one party or both performing unitary operations on encoding photons, two times of security check, and both parties’ private data being decoded chronologically from encoding photons. This work proposes a brand-new QD model, whose quantum transmission is unidirectional with only one security check and decoding of both parties’ secrets are simultaneous. Equally important is neither unitary operations nor auxiliary photons being used. Consequently, such a QD can substantially reduce costs and increase efficiency, thus entitled fast quantum dialogue (FQD). The presented FQD protocol is analysed with safety and without information leakage. Moreover, its information-theoretical efficiency is 88.89%, much higher than the current maximum 66.67%. So, it offers us a better alternative for QD.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00366-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A novel quantum multiparty summation protocol based on a cooperative random number mechanism 基于合作随机数机制的新型量子多方求和协议

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-22 DOI: 10.1140/epjqt/s40507-025-00361-2

Kejia Zhang, Yu Zhang, Xue Zhang, Hongyan Liu, Tingting Song, Gang Du

{"title":"A novel quantum multiparty summation protocol based on a cooperative random number mechanism","authors":"Kejia Zhang, Yu Zhang, Xue Zhang, Hongyan Liu, Tingting Song, Gang Du","doi":"10.1140/epjqt/s40507-025-00361-2","DOIUrl":"10.1140/epjqt/s40507-025-00361-2","url":null,"abstract":"<div><p>As a particular area of quantum security multiparty computation, quantum secure multiparty summation plays a critical role in modern cryptography. It is widely known that most of the existing quantum summation protocols are based on an honest or semi-honest third party (TP). However, the introduced TP makes the protocol difficult to implement in practice, as it may face a single-point-of-failure attack on TP. Although some TP-free protocols are proposed to mitigate this risk, the increased cost of communication reduces its efficiency. To address these issues, a novel quantum-secure multiparty summation protocol based on a cooperative random number distribution mechanism (QMS-CRM) is proposed in this paper for the first time. During it, this mechanism is designed using Shamir’s secret sharing scheme. Furthermore, this approach eliminates the requirement for random number exchange between participants without the help of TP, enhancing the efficiency of the protocol. The security analysis demonstrates that the proposed protocol can resist both external attacks and collusion attacks by up to <span>(n - 2)</span> participants. Finally, we simulated the protocol on the IBM Quantum Cloud platform, confirming its feasibility.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00361-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

High-performance in-vacuum optical system for quantum optics experiments in a Penning-trap 彭宁阱量子光学实验的高性能真空光学系统

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-22 DOI: 10.1140/epjqt/s40507-025-00357-y

Joaquín Berrocal, Daniel Rodríguez

引用次数: 0

Quantum sensing for NASA science missions 用于NASA科学任务的量子传感

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-21 DOI: 10.1140/epjqt/s40507-025-00360-3

Carolyn R. Mercer, Erica N. Montbach, Steven D. Christe, Robert M. Connerton, Denise A. Podolski, Michael P. Robinson, Mario R. Perez

引用次数: 0

Parallel remote preparation of two-qubit hybrid states on four degrees of freedom via two-photon hyperentangled Bell state 利用双光子超纠缠贝尔态并行远程制备四自由度双量子比特杂化态

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-20 DOI: 10.1140/epjqt/s40507-025-00365-y

Cheng-Ming Huang, Yu-Bin Huang, Ping Zhou

{"title":"Parallel remote preparation of two-qubit hybrid states on four degrees of freedom via two-photon hyperentangled Bell state","authors":"Cheng-Ming Huang, Yu-Bin Huang, Ping Zhou","doi":"10.1140/epjqt/s40507-025-00365-y","DOIUrl":"10.1140/epjqt/s40507-025-00365-y","url":null,"abstract":"<div><p>Preparing quantum state remotely plays an important role in quantum communication network. Most of the previous protocols for parallel preparation quantum state remotely only consider parallel remote preparation of arbitrary single-qubit states. In this paper, we propose a protocol for parallel remote preparation of two-qubit hybrid states with a two-photon hyperentangled state. The arbitrary two-qubit hybrid states encoded in spatial-mode, frequency, polarization and time-bin degrees of freedom(DOFs) can be remotely prepared via hyperentangled state and optical elements. Moreover, we discuss parallel remote preparation of two-qubit hybrid states via partially hyperentangled state. The protocol for parallel remote preparation of two-qubit hybrid states has the advantage of having high channel capacity for long distance quantum communication by using hyperentangled state simultaneously entangled in spatial-mode, frequency, polarization and time-bin DOFs as the quantum channel.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00365-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A quantum constraint generation framework for binary linear programs 二元线性规划的量子约束生成框架

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-19 DOI: 10.1140/epjqt/s40507-025-00364-z

András Czégel, Boglárka G.-Tóth

{"title":"A quantum constraint generation framework for binary linear programs","authors":"András Czégel, Boglárka G.-Tóth","doi":"10.1140/epjqt/s40507-025-00364-z","DOIUrl":"10.1140/epjqt/s40507-025-00364-z","url":null,"abstract":"<div><p>We propose a new approach to utilize quantum computers for binary linear programming (BLP), which can be extended to general integer linear programs (ILP). Quantum optimization algorithms, hybrid or quantum-only, are currently general purpose, standalone solvers for ILP. However, to consider them practically useful, we expect them to overperform the current state of the art classical solvers. That expectation is unfair to quantum algorithms: in classical ILP solvers, after many decades of evolution, many different algorithms work together as a robust machine to get the best result. This is the approach we would like to follow now with our quantum ‘solver’ solutions. In this study we wrap any suitable quantum optimization algorithm into a quantum informed classical constraint generation framework. First we relax our problem by dropping all constraints and encode it into an Ising Hamiltonian for the quantum optimization subroutine. Then, by sampling from the solution state of the subroutine, we obtain information about constraint violations in the initial problem, from which we decide which coupling terms we need to introduce to the Hamiltonian. The coupling terms correspond to the constraints of the initial binary linear program. Then we optimize over the new Hamiltonian again, until we reach a feasible solution, or other stopping conditions hold. Since one can decide how many constraints they add to the Hamiltonian in a single step, our algorithm is at least as efficient as the (hybrid) quantum optimization algorithm it wraps. We support our claim with results on small scale minimum cost exact cover problem instances.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00364-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Reinforcement learning approach for finding exchange-only gate sequences for CNOT with optimized gate time 基于优化门时间的CNOT单交换门序列的强化学习方法

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-16 DOI: 10.1140/epjqt/s40507-025-00363-0

Violeta N. Ivanova-Rohling, Niklas Rohling, Guido Burkard

引用次数: 0

Full qubit control of the double quantum transition in NV centers for low-field or high-frequency sensing 低场或高频传感中NV中心双量子跃迁的全量子位控制

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-15 DOI: 10.1140/epjqt/s40507-025-00358-x

Alberto López-García, Javier Cerrillo

{"title":"Full qubit control of the double quantum transition in NV centers for low-field or high-frequency sensing","authors":"Alberto López-García, Javier Cerrillo","doi":"10.1140/epjqt/s40507-025-00358-x","DOIUrl":"10.1140/epjqt/s40507-025-00358-x","url":null,"abstract":"<div><p>We present a scheme for the implementation of fast arbitrary qubit gates in the ground state of the negatively charged nitrogen-vacancy (NV) defect in diamond. The protocol is especially useful for sensing in two regimes: on the one hand, in the low-field limit where the Zeeman splitting of the NV-center is smaller than the MW Rabi frequency; on the other hand, for the detection of high-frequency signals, comparable to the Zeeman splitting of the NV center. It constitutes an extension to the NV-ERC technique, which has demonstrated efficient initialization and readout of the double quantum transition with no leakage to any third level thanks to an effective Raman coupling. Here we derive a full theoretical framework of the scheme, identifying the complete unitary associated to the approach, and more specifically the relevant basis transformation for each of two characteristic pulse durations. Based on this insight, we propose a scheme to perform fast single qubit gates in the double quantum transition. We study its robustness with respect to pulse-timing errors resulting from faulty identification of system parameters or phase-control limitations. We finally demonstrate that the technique can also be implemented in the presence of unknown electric or strain fields and numerically test its effectiveness in a Hahn echo sequence in the high-frequency or low-field regime.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00358-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Parallel trusted node approach for satellite quantum key distribution 卫星量子密钥分发的并行可信节点方法

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-06 DOI: 10.1140/epjqt/s40507-025-00354-1

Gianluca De Santis, Konstantin Kravtsov, Sana Amairi-Pyka, James A. Grieve

引用次数: 0