EPJ Quantum Technology最新文献_第2页

Multiparty-to-multiparty mediated quantum secret sharing protocol in a restricted quantum environment 受限量子环境下多方对多方中介的量子秘密共享协议

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-11 DOI: 10.1140/epjqt/s40507-025-00404-8

Chia-Wei Tsai, Chun-Hsiang Wang, Jason Lin, Chun-Wei Yang

{"title":"Multiparty-to-multiparty mediated quantum secret sharing protocol in a restricted quantum environment","authors":"Chia-Wei Tsai, Chun-Hsiang Wang, Jason Lin, Chun-Wei Yang","doi":"10.1140/epjqt/s40507-025-00404-8","DOIUrl":"10.1140/epjqt/s40507-025-00404-8","url":null,"abstract":"<div><p>This study proposes the first multiparty-to-multiparty mediated quantum secret sharing (M2M-MQSS) protocol within a restricted quantum environment. Unlike existing fully quantum secret sharing (QSS) protocols, this protocol allows protocol participants with limited quantum capabilities—including (1) measuring a single qubit in the Z-basis and (2) performing a single-qubit unitary operation, Hadamard operation—to participate, significantly reducing implementation costs. By employing one-way qubit transmission, the proposed MMQSS protocol not only simplifies the quantum communication process but also effectively defends against quantum Trojan horse attacks. The correctness and security analyses demonstrate that the proposed M2M-MQSS protocol is robust against various well-known attack strategies. Simulation experiments confirm the feasibility of the protocol for various numbers of participants. It maintains high levels of efficiency and security even as the number of participants increases. Moreover, compared with existing protocols, the proposed M2M-MQSS protocol lowers the barrier to practical quantum communication deployment by reducing the quantum resources required for protocol participants.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00404-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810884","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

Quantum clock synchronization with the silicon-chip based entangled photon source 基于硅片的纠缠光子源的量子时钟同步

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-07 DOI: 10.1140/epjqt/s40507-025-00399-2

Hui Han, Jia-ao Li, Bang-Ying Tang, Jia-hao Li, Jin-quan Huang, Huan Chen, Wan-Rong Yu, Bo Liu, Shu-hui Chen

{"title":"Quantum clock synchronization with the silicon-chip based entangled photon source","authors":"Hui Han, Jia-ao Li, Bang-Ying Tang, Jia-hao Li, Jin-quan Huang, Huan Chen, Wan-Rong Yu, Bo Liu, Shu-hui Chen","doi":"10.1140/epjqt/s40507-025-00399-2","DOIUrl":"10.1140/epjqt/s40507-025-00399-2","url":null,"abstract":"<div><p>Leveraging the properties of quantum entanglement and squeezing, quantum clock synchronization offers significant advantages in improving precision and security. For scalable quantum clock synchronization networks, developing an accurate time deviation analysis model is essential to characterize long-term timing stability and enable reliable deployment in real-world systems. This paper proposes a synchronization stability analysis model that establishes the theoretically achievable time deviation based on the Cramér-Rao lower bound. We experimentally validate this model using a round-trip quantum clock synchronization protocol over 50 km of fiber, employing an integrated silicon-photonic chip that generates frequency-entangled photon pairs via four-wave mixing. Results show a synchronization accuracy of 15.08 ps and a time deviation of 901 fs at an averaging time of 10,240 seconds, while our model analysis shows a standard deviation of 12.21 ps. This work provides a fundamental framework for building robust, large-scale quantum networks.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00399-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142940","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

Quantum terminology in pseudoscience: exploration of pre-service physics teachers’ reasonings 伪科学中的量子术语：职前物理教师推理的探索

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-07 DOI: 10.1140/epjqt/s40507-025-00403-9

Michael Brang, Franziska Greinert, Malte S. Ubben, Helena Franke, Philipp Bitzenbauer

{"title":"Quantum terminology in pseudoscience: exploration of pre-service physics teachers’ reasonings","authors":"Michael Brang, Franziska Greinert, Malte S. Ubben, Helena Franke, Philipp Bitzenbauer","doi":"10.1140/epjqt/s40507-025-00403-9","DOIUrl":"10.1140/epjqt/s40507-025-00403-9","url":null,"abstract":"<div><p>The growing public fascination with quantum technologies has inadvertently fueled the rise of pseudoscientific claims, particularly the misuse of quantum terminology in fields such as alternative medicine. This phenomenon poses a challenge for physics education, where the distinction between legitimate science and pseudoscience is essential. This paper examines how pre-service physics teachers (N = 28) respond to pseudoscientific uses of quantum terminology, particularly in the context of quantum healing. Therefore, the participants were asked to evaluate a pseudoscientific text about quantum healing in a classroom-like vignette, responding as if they were addressing a student. Their responses were analyzed using qualitative content analysis to categorize the types of reasoning used. Most participants were successful in identifying scientific inaccuracies and misuse of technical terms, although only a proportion applied broader Nature of Science (NOS)-related critiques. The findings suggest that although pre-service teachers are adept at identifying pseudoscientific claims, more emphasis on the principles of NOS could improve their ability to make comprehensive judgements.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00403-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142318","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

Robust-fidelity high-dimensional controlled-controlled-SUM gate with qudits 具有量子位的高维控控sum门的鲁棒保真度

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-06 DOI: 10.1140/epjqt/s40507-025-00398-3

Fang-Fang Du, Xin-Shan Du, Zhuo-Ya Bai, Qiang Zhu, Qiu-Lin Tan

{"title":"Robust-fidelity high-dimensional controlled-controlled-SUM gate with qudits","authors":"Fang-Fang Du, Xin-Shan Du, Zhuo-Ya Bai, Qiang Zhu, Qiu-Lin Tan","doi":"10.1140/epjqt/s40507-025-00398-3","DOIUrl":"10.1140/epjqt/s40507-025-00398-3","url":null,"abstract":"<div><p>High-dimensional (HD) quantum systems are capable of processing more complex information and performing a wider array of quantum operations, in contrast to low-dimensional (LD) quantum systems, thereby improving the speed and fault tolerance of quantum computing. In the study, we propose a deterministic qudit-encoded <span>(4times 4times 4)</span>-dimensional (64D) controlled-controlled-SUM (CCSUM) gate based on weak Kerr effect. The 64D CCSUM gate leverages the polarization and spatial degrees of freedom (DoFs) of three photons to encode 4D control and target qudits, thereby optimizing quantum resources and reducing costs. Moreover, the HD CCSUM gate functionality is implemented in a deterministic way by employing the X-Homodyne detector to measure coherent states, combined with related classical feed-forward operations. Through detailed analyses, the proposed HD CCSUM gate, under current technological conditions, exhibits robust fidelity and feasibility, offering a promising path toward the realization of HD quantum computing.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00398-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142287","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 note on “On validity of quantum partial adiabatic search” 关于“关于量子部分绝热搜索的有效性”的注记

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-06 DOI: 10.1140/epjqt/s40507-025-00396-5

Jie Sun, Hui Zheng

引用次数: 0

Quantum computational resources for lattice QCD in the strong-coupling limit 强耦合极限下晶格QCD的量子计算资源

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-05 DOI: 10.1140/epjqt/s40507-025-00395-6

Michael Fromm, Lucas Katschke, Owe Philipsen, Wolfgang Unger

引用次数: 0

Demonstration of strong coupling of a subradiant atom array to a cavity vacuum 子辐射原子阵列与空腔真空强耦合的演示

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-05 DOI: 10.1140/epjqt/s40507-025-00401-x

Bence Gábor, Adwaith K. Varooli, Dániel Varga, Bálint Sárközi, Árpád Kurkó, András Dombi, Thomas W. Clark, Francis I. B. Williams, David Nagy, András Vukics, Peter Domokos

引用次数: 0

Optical ground station diversity for satellite quantum key distribution in Ireland 爱尔兰卫星量子密钥分配的光学地面站分集

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-04 DOI: 10.1140/epjqt/s40507-025-00390-x

Naga Lakshmi Anipeddi, Jerry Horgan, Daniel K. L. Oi, Deirdre Kilbane

{"title":"Optical ground station diversity for satellite quantum key distribution in Ireland","authors":"Naga Lakshmi Anipeddi, Jerry Horgan, Daniel K. L. Oi, Deirdre Kilbane","doi":"10.1140/epjqt/s40507-025-00390-x","DOIUrl":"10.1140/epjqt/s40507-025-00390-x","url":null,"abstract":"<div><p>Space quantum communications is a potential means for establishing global secure communications and quantum networking. Despite pioneering demonstrations of satellite quantum key distribution, considerable challenges remain for wide deployment such as the local effects of the atmosphere on the transmission of single-photon level quantum signals. As part of Ireland’s efforts to establish quantum links with the rest of Europe and further afield, we present a preliminary study of the feasibility of satellite quantum key distribution taking into account geographic and weather effects on the space-Earth channel. Weather data over 5 years covering 4 locations across Ireland were used to assess performance and the prospects of optical ground station (OGS) geographic diversity to improve service availability. Despite significant cloud cover that may reduce the performance of a single OGS location, the use of a 4-OGS network can provide up to 45% improvement for a single satellite exploiting anti-correlation in cloud cover, though most gains are achieved with 2 or 3 OGSs.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00390-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142355","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

Quantum information metrics of a multi-level atom interacting with an SU(1;1) quantum amplifier system 多能级原子与SU（1;1）量子放大系统相互作用的量子信息度量

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-08-01 DOI: 10.1140/epjqt/s40507-025-00394-7

Ahmed A. Zahia, Hasnaa M. Saad, S. I. Ali, M. M. A. Ahmed, A.-S. F. Obada

{"title":"Quantum information metrics of a multi-level atom interacting with an SU(1;1) quantum amplifier system","authors":"Ahmed A. Zahia, Hasnaa M. Saad, S. I. Ali, M. M. A. Ahmed, A.-S. F. Obada","doi":"10.1140/epjqt/s40507-025-00394-7","DOIUrl":"10.1140/epjqt/s40507-025-00394-7","url":null,"abstract":"<div><p>This study investigates the quantum information dynamics of a multi-level atomic system interacting with an SU(1;1) quantum system, focusing on atomic inversion, entropy, coherence, and skew information. The system is specified as a two-level and three-level Λ-type configuration, incorporating multi-mode SU(1;1) quantum systems and the Stark effect. Numerical simulations are performed to solve the time-dependent density matrix equations under varying shift, intensity, and Stark parameters. Results show that increasing the shift stabilizes inversion but raises statistical uncertainty, while greater field intensity amplifies entropy. The Stark amplitude suppresses decoherence and improves quantum information retention. Negativity is used to quantify entanglement between the first two SU(1;1) modes, showing that stronger Stark shifts stabilize entanglement and coherence. Three-level systems consistently outperform two-level ones in preserving coherence and entanglement due to enhanced interference and spectral separation. Eigenvalue analysis reveals the nonlinear structure of three-level systems, explaining their robustness. These findings are supported by recent experiments in SU(1;1) interferometry and Stark-tuned quantum systems, offering insights for quantum sensing, computation, and communication.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00394-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142245","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

Investigating high school and pre-high school teachers’ perceptions and experiences introducing quantum concepts: a survey of QuanTime and other quantum-related activities 调查高中和学前教师对引入量子概念的感知和经验：对QuanTime和其他量子相关活动的调查

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-07-30 DOI: 10.1140/epjqt/s40507-025-00392-9

Apekshya Ghimire, Jaya Shivangani Kashyap, Emily Edwards, Diana Franklin, Chandralekha Singh

{"title":"Investigating high school and pre-high school teachers’ perceptions and experiences introducing quantum concepts: a survey of QuanTime and other quantum-related activities","authors":"Apekshya Ghimire, Jaya Shivangani Kashyap, Emily Edwards, Diana Franklin, Chandralekha Singh","doi":"10.1140/epjqt/s40507-025-00392-9","DOIUrl":"10.1140/epjqt/s40507-025-00392-9","url":null,"abstract":"<div><p>This study investigates the experiences of pre-high and high school teachers in implementing QuanTime and other quantum-related activities aiming to promote quantum literacy and introduce foundational quantum concepts to K-12 students. The ultimate goal is to help prepare a diverse future workforce in quantum information science and technology (QIST). Teachers were divided into two groups: pre-high school (grades 4-8) and high school (grades 9-12). We used a survey featuring 12 Likert-scale questions and 14 open-ended responses to assess teachers’ perceptions, engagement, and feedback about engaging in QuanTime and other quantum-related activities. Approximately two-thirds of the teachers responding to the survey implemented QuanTime activities in their classes. High school teachers who responded to the survey were most likely to use activities like Wave-Particle Duality and Electron Transitions while pre-high school teachers showed a strong interest in Art & Polarization. Open-ended feedback highlighted the ease of integrating these activities into existing curricula and the minimal preparation required, making them accessible for educators. The positive reception across both groups indicates that QuanTime and other quantum-related activities are valuable tools for early-age quantum education. By engaging students with quantum concepts from a young age, these activities have the potential to spark interest, which may contribute to their future engagement over time. It can inspire a diverse group of students and has the potential to get them interested in future opportunities in the growing field of QIST.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00392-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145706","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