EPJ Quantum Technology最新文献_第5页

Efficient quantum circuit compilation for near-term quantum advantage 近期量子优势的高效量子电路编译

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-06-10 DOI: 10.1140/epjqt/s40507-025-00368-9

Yuchen Guo, Shuo Yang

{"title":"Efficient quantum circuit compilation for near-term quantum advantage","authors":"Yuchen Guo, Shuo Yang","doi":"10.1140/epjqt/s40507-025-00368-9","DOIUrl":"10.1140/epjqt/s40507-025-00368-9","url":null,"abstract":"<div><p>Quantum noise in real-world devices poses a significant challenge in achieving practical quantum advantage, since accurately compiled and executed circuits are typically deep and highly susceptible to decoherence. To facilitate the implementation of complex quantum algorithms on noisy hardware, we propose an approximate method for compiling target quantum circuits into brick-wall layouts. This new circuit design consists of two-qubit CNOT gates that can be directly implemented on real quantum computers, in conjunction with optimized one-qubit gates, to approximate the essential dynamics of the original circuit while significantly reducing its depth. Our approach is evaluated through numerical simulations of time-evolution circuits for the critical Ising model, quantum Fourier transformation, and Haar-random quantum circuits, as well as experiments on IBM quantum platforms. By accounting for compilation error and circuit noise, we demonstrate that time evolution and quantum Fourier transformation circuits achieve high compression rates, while random quantum circuits are less compressible. The degree of compression is related to the rate of entanglement accumulation in the target circuit. In particular, experiments on IBM platforms achieve a compression rate of 12.5 for <span>(N=12)</span>, significantly extending the application of current quantum devices. Furthermore, large-scale numerical simulations for system sizes up to <span>(N=30)</span> reveal that the optimal depth <span>(d_{mathrm{max}})</span> to achieve maximal overall fidelity is independent of system size <i>N</i>, suggesting the scalability of our method for large quantum devices in terms of quantum resources.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00368-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143087","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

Molecular topological quantum computer 分子拓扑量子计算机

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-06-06 DOI: 10.1140/epjqt/s40507-025-00375-w

Sheh-Yi Sheu, Hua-Yi Hsu, Tzu-Hsuan Yang, Jin-Pei Deng, Dah-Yen Yang

{"title":"Molecular topological quantum computer","authors":"Sheh-Yi Sheu, Hua-Yi Hsu, Tzu-Hsuan Yang, Jin-Pei Deng, Dah-Yen Yang","doi":"10.1140/epjqt/s40507-025-00375-w","DOIUrl":"10.1140/epjqt/s40507-025-00375-w","url":null,"abstract":"<div><p>Biomolecular residue pairs have been utilized in constructing quantum logic gates (QLGs), significantly reducing the hardware size to the subnanoscale level. However, the development of molecular fault-tolerant topological quantum computers (TQCs) presents challenges in error reduction and hardware size minimization. This study presents the manipulation of molecular QLGs (MQLGs) by utilizing protein residue pairs as molecular transistors, enabling the construction of molecular topological QLGs. This innovative approach leverages molecular functionality in quantum computer (QC) designs to build sub-nanometer transistors that significantly reduce size, enhance efficiency, and accelerate computing. The transmission spectra of electron transfer in molecular junction systems were analyzed using the non-equilibrium Green’s function method. The molecular field effect led to the observation of four quantum states on a two-dimensional potential energy surface with two degrees of freedom—proton translation and molecular rotation. These states form a quaternary QLG, similar to a 2-qubit controlled-NOT logic gate. By applying the Kitaev honeycomb lattice model, MQLGs were employed to generate nonabelian anyons that adhere to fusion rules, such as Ising and Fibonacci anyons. Furthermore, quantum circuits incorporating nonabelian anyons and their fusion processes were developed for practical applications. These findings underscore the shift away from conventional atom-based silicon technology and highlight the potential for innovative applications of molecular universal QLGs, particularly in the advancement of sub-nanometer molecular fault-tolerance TQCs.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00375-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142701","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 attacks on Sum of Even-Mansour construction utilizing online classical queries 利用在线经典查询对偶数-曼苏尔构造和的量子攻击

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-06-05 DOI: 10.1140/epjqt/s40507-025-00374-x

Zhenqiang Li, Shuqin Fan, Fei Gao, Yonglin Hao, Hongwei Sun, Xichao Hu, Dandan Li

{"title":"Quantum attacks on Sum of Even-Mansour construction utilizing online classical queries","authors":"Zhenqiang Li, Shuqin Fan, Fei Gao, Yonglin Hao, Hongwei Sun, Xichao Hu, Dandan Li","doi":"10.1140/epjqt/s40507-025-00374-x","DOIUrl":"10.1140/epjqt/s40507-025-00374-x","url":null,"abstract":"<div><p>The Sum of Even-Mansour (<span>SoEM</span>) construction, proposed by Chen et al. at Crypto 2019, has become the basis for designing some symmetric schemes, such as the nonce-based MAC scheme <span>(text{nEHtM}_{p})</span> and the nonce-based encryption scheme CENCPP<sup>∗</sup>. In this paper, we make the first attempt to study the quantum security of <span>SoEM</span> under the Q1 model where the targeted encryption oracle can only respond to classical queries rather than quantum ones. Firstly, we propose a quantum key recovery attack on <span>SoEM21</span> with a time complexity of <span>(tilde{O}(2^{n/3}))</span> along with <span>(O(2^{n/3}))</span> online classical queries. Compared with the current best classical result which requires <span>(O(2^{2n/3}))</span> time, our method offers a quadratic time speedup while maintaining the same number of queries. The time complexity of our attack is less than that observed for quantum exhaustive search by a factor of <span>(2^{n/6})</span>. We further propose classical and quantum key recovery attacks on the generalized <span>SoEM</span><i>s</i>1 construction (consisting of <span>(sgeq 2)</span> independent public permutations), revealing that the application of quantum algorithms can provide a quadratic acceleration over the pure classical methods. Our results also imply that the quantum security of <span>SoEM21</span> cannot be strengthened merely by increasing the number of permutations.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00374-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142561","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 computing for space applications: a selective review and perspectives 量子计算在空间中的应用：选择性回顾与展望

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-06-05 DOI: 10.1140/epjqt/s40507-025-00369-8

Pietro Torta, Rebecca Casati, Stefano Bruni, Antonio Mandarino, Enrico Prati

{"title":"Quantum computing for space applications: a selective review and perspectives","authors":"Pietro Torta, Rebecca Casati, Stefano Bruni, Antonio Mandarino, Enrico Prati","doi":"10.1140/epjqt/s40507-025-00369-8","DOIUrl":"10.1140/epjqt/s40507-025-00369-8","url":null,"abstract":"<div><p>Space science and technology are among the most challenging and strategic fields in which quantum computing promises to have a pervasive and long-lasting impact. We provide an overview of selected published works reporting the application of quantum computing to space science and technology. Our systematic analysis identifies three major classes of problems that have been approached with quantum computing. The first category includes optimization tasks, often cast into Quadratic Unconstrained Binary Optimization and solved using quantum annealing, with scheduling problems serving as a notable example. A second class comprises learning tasks, such as image classification in Earth Observation, often tackled with gate-based hybrid quantum-classical computation, namely with Quantum Machine Learning concepts and tools. Finally, integrating quantum computing with other quantum technologies may lead to new disruptive technologies, for instance, the creation of a quantum satellite internet constellation and distributed quantum computing. We organize our exposition by providing a critical analysis of the main challenges and methods at the core of different quantum computing paradigms and algorithms, which are often fundamentally similar across different domains of application in the space sector and beyond.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00369-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142693","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

Dark energy search by atom interferometry in the Einstein-elevator 用原子干涉测量法在爱因斯坦电梯中搜索暗能量

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-06-03 DOI: 10.1140/epjqt/s40507-025-00371-0

Charles Garcion, Sukhjovan S. Gill, Magdalena Misslisch, Alexander Heidt, Ioannis Papadakis, Baptist Piest, Vladimir Schkolnik, Thijs Wendrich, Arnau Prat, Kai Bleeke, Hauke Müntinga, Markus Krutzik, Sheng-wey Chiow, Nan Yu, Christoph Lotz, Naceur Gaaloul, Ernst M. Rasel

引用次数: 0

Quantum machine learning via continuous-variable cluster states and teleportation 通过连续变量簇态和隐形传态的量子机器学习

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-06-02 DOI: 10.1140/epjqt/s40507-025-00352-3

Jorge García-Beni, Iris Paparelle, Valentina Parigi, Gian Luca Giorgi, Miguel C. Soriano, Roberta Zambrini

{"title":"Quantum machine learning via continuous-variable cluster states and teleportation","authors":"Jorge García-Beni, Iris Paparelle, Valentina Parigi, Gian Luca Giorgi, Miguel C. Soriano, Roberta Zambrini","doi":"10.1140/epjqt/s40507-025-00352-3","DOIUrl":"10.1140/epjqt/s40507-025-00352-3","url":null,"abstract":"<div><p>We propose a new approach for a photonic platform suitable for distributed quantum machine learning and exhibiting memory. This measurement-based quantum reservoir computing takes advantage of continuous variable cluster states as the main quantum resource. Cluster states are key to several photonic quantum technologies, enabling universal quantum computing as well as quantum communication protocols. The proposed measurement-based quantum reservoir computing is based on a neural network of cluster states and local operations, where input data are encoded through measurement, thanks to quantum teleportation. In this design, measurements enable input injections, information processing and continuous monitoring for time series processing. The architecture’s power and versatility are tested by performing a set of benchmark tasks showing that the protocol displays internal memory and is suitable for both static and temporal information processing without hardware modifications. This design opens the way to distributed machine learning.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00352-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142259","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

Energy and power scaling in quantum computers based on rotated surface codes with silicon flip-flop qubits 基于硅触发器量子比特旋转表面编码的量子计算机的能量和功率缩放

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-06-02 DOI: 10.1140/epjqt/s40507-025-00351-4

Marco De Michielis, Elena Ferraro

{"title":"Energy and power scaling in quantum computers based on rotated surface codes with silicon flip-flop qubits","authors":"Marco De Michielis, Elena Ferraro","doi":"10.1140/epjqt/s40507-025-00351-4","DOIUrl":"10.1140/epjqt/s40507-025-00351-4","url":null,"abstract":"<div><p>Scalable solutions are essential to achieving the long-term goal of building a fault-tolerant quantum computer and energy-power consumption are fundamental limiting factors for this target. Among the available types of silicon qubits, this work focuses on Flip-Flop (FF) qubits. Energy consumption and power requirements are estimated for a square array of qubits that hosts the logical qubit. The logical qubit is implemented using the rotated Surface Code (SC) for Quantum Error Correction (QEC). By using a universal set of quantum gates, the energy usage, time and power requirements for a SC cycle are estimated based on noise level, code distance and control levels. These estimates are used to provide insights into the main scaling-up challenges for quantum computer development. This is achieved by extending a thermal model that includes energy contributions from both the cryogenic components (such as the qubit array, the cryogenic control electronics, and the cryostat) and the room temperature (RT) section (RT electronics and heat dissipation systems). The maximum numbers of physical and logical qubits are provided, as well as power consumption across the different temperature sections.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00351-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142260","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

Free-induction-decay magnetometer based on synchronous optical pumping and RF pulse modulation 基于同步光泵浦和射频脉冲调制的自由感应衰减磁强计

IF 5.6 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-05-30 DOI: 10.1140/epjqt/s40507-025-00373-y

Jinghong Xu, Liwei Jiang, Junhao Liu, Jiali Liu, Yuanqiang Chen, Jun Zhu, Chi Fang, Qi Shao, Yuntian Zou, Huijing Bai

{"title":"Free-induction-decay magnetometer based on synchronous optical pumping and RF pulse modulation","authors":"Jinghong Xu, Liwei Jiang, Junhao Liu, Jiali Liu, Yuanqiang Chen, Jun Zhu, Chi Fang, Qi Shao, Yuntian Zou, Huijing Bai","doi":"10.1140/epjqt/s40507-025-00373-y","DOIUrl":"10.1140/epjqt/s40507-025-00373-y","url":null,"abstract":"<div><p>Free-induction-decay (FID) magnetometer is highly suitable for precise magnetic field sensing in unshielded environments with the benefit of exceptional accuracy and large dynamic range. The sensitivity of the FID magnetometer is directly influenced by the signal-to-noise ratio, making it critical to enhance the amplitude of the FID signal. In this study, we propose a FID magnetometer based on synchronous optical pumping and RF pulse modulation. A comprehensive theoretical description of the magnetometer is introduced, followed by simulation and experiment that compare the proposed modulation method with the synchronous optical pumping modulation method and the RF pulse modulation method. The results show that the synchronous optical pumping and RF pulse modulation achieves the enhancement of the FID signal and improves the magnetometer sensitivity. Furthermore, the dead zone of the magnetometer is reduced to the direction of the probe beam. This work is significant for further development of optically pumped magnetometers and provides a new scheme for their applications in unshielded environments.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00373-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145663","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

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