EPJ Quantum Technology最新文献

{"title":"Modelling quantum curriculum innovation: a pilot study","authors":"Jonas Bley,&nbsp;Simon Goorney,&nbsp;Aurél Gábris,&nbsp;Stefan Küchemann,&nbsp;Stefan Heusler,&nbsp;Artur Widera,&nbsp;Jacob Sherson","doi":"10.1140/epjqt/s40507-026-00476-0","DOIUrl":"10.1140/epjqt/s40507-026-00476-0","url":null,"abstract":"<div><p>As educational programs in Quantum Information Science and Technology (QIST) continue to expand, there is an opportunity to strengthen dialogue between educational researchers (especially discipline-based education researchers) and teaching staff. Building on our prior curriculum transformation framework, we designed a practical guide comprising 17 design considerations for teaching. To investigate whether, why, and how these considerations support pedagogical (didactical) innovation, we facilitated structured, guided reflections with 12 multinational QIST course providers. Thematic analysis indicated that the 17 considerations were broadly well accepted and that the guided reflection was valued; participants also suggested refinements and identified additional considerations not captured by the framework. As a pilot study, we offer initial insights about mechanisms that may enable or hinder innovation in QIST. We update the framework in light of the findings and outline avenues for future research and practice.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00476-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147338231","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}

{"title":"Leveraging quantum computing business applications: a B-SLR approach and future research directions","authors":"Gaurav Sarin,&nbsp;Yogendra Sai Reddy,&nbsp;Manya Sarin","doi":"10.1140/epjqt/s40507-026-00475-1","DOIUrl":"10.1140/epjqt/s40507-026-00475-1","url":null,"abstract":"<div><p>Quantum computing (QC) advances will help solve high complexity challenges that classical system architectures cannot solve. This report examines the philosophical foundation for QC research using a PRISMA-compliant systematic literature review and bibliometric analysis. This review emphasizes business applications of QC, including optimization, cryptography and cybersecurity, machine learning, financial modeling and forecasting, supply chain management, healthcare and analytics, and materials design, showing how QC can improve prediction and forecast accuracy, data physicalness, large-scale optimization, and more.</p><p>The research will also identify execution constraints such hardware readiness, qubit capacity, development and operation expenses, personnel availability, and regulatory and commercial governance. Bibliometric data showed a focus on foundational quantum theoretical contributions and algorithms, with multidisciplinary and practical work emerging. Scaled algorithms, quantum-resistant standards, and any solutions industry nexus to enterprise are among the research opportunities. The literature evaluation will also identify ethical, policy, and sustainability issues related to quantum benefits.</p><p>The paper helps businesspeople understand QC’s current and future opportunities, including a research-based assessment of where we’ve come, common themes in the literature, and strategic domains for scaling QC as a research agenda from laboratory experiments to enriching the service experience as commercial utility.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00475-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147440743","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}

{"title":"Quantum error mitigation via structural encoding with classical error correction codes","authors":"IlKwon Sohn,&nbsp;Changyeol Lee,&nbsp;Wooyeong Song,&nbsp;Kwangil Bae,&nbsp;Wonhyuk Lee","doi":"10.1140/epjqt/s40507-026-00474-2","DOIUrl":"10.1140/epjqt/s40507-026-00474-2","url":null,"abstract":"<div><p>Bridging the gap between today’s noisy quantum hardware and future fault-tolerant systems requires practical error management strategies that go beyond statistical mitigation. We propose a scheme that embeds quantum algorithms within the structure of classical error correction codes, offering a step toward fault-tolerance without the full overhead of quantum error correction. Our approach targets the asymmetric structure of many key algorithms, where complex, problem-defining diagonal operators (e.g., oracles) are paired with simple, fixed non-diagonal operators (e.g., diffusion operators). The core of our scheme is an encoding that commutes with the diagonal operators, obviating any associated overhead, while confining the main computational overhead of encoding and decoding to the non-diagonal components. This approach concentrates error resilience where it is most needed. Noisy simulations demonstrate that our scheme substantially improves the probability of success, providing a viable strategy to enhance quantum algorithmic performance pending the arrival of full-scale fault-tolerance.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00474-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337238","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}

{"title":"Fast quantum amplitude encoding of typical classical data","authors":"Vittorio Pagni,&nbsp;Sigurd Huber,&nbsp;Michael Epping,&nbsp;Michael Felderer","doi":"10.1140/epjqt/s40507-026-00473-3","DOIUrl":"10.1140/epjqt/s40507-026-00473-3","url":null,"abstract":"<div><p>We present an improved version of a quantum amplitude encoding scheme that encodes the <i>N</i> entries of a unit classical vector <span>(boldsymbol{v}=(v_{1},..,v_{N}))</span> into the amplitudes of a quantum state. Our approach has a quadratic speed-up with respect to the original one. We also describe several generalizations, including to complex entries of the input vector and a parameter <i>M</i> that determines the parallelization. The number of qubits required for the state preparation scales as <span>(mathcal{O}(Mlog N))</span>. The runtime, which depends on the data density <i>ρ</i> and on the parallelization paramater <i>M</i>, scales as <span>(mathcal{O}(frac{1}{sqrt{rho}}frac{N}{M}log (M+1)))</span>, which in the most parallel version (<span>(M=N)</span>) is always less or equal than <span>(mathcal{O}(sqrt{N}log N))</span>.</p><p>By analysing the data density, we prove that the average runtime is <span>(mathcal{O}(log ^{1.5} N))</span> for input vectors that are uniformly sampled on the <i>N</i>-sphere. We present numerical evidence that this favourable runtime behaviour also holds for real-world data, such as radar satellite images. This is promising as it allows for an input-to-output advantage of the quantum Fourier transform.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00473-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336965","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}

{"title":"Automated quantum algorithm design using a domain-specific language","authors":"Amy Rouillard,&nbsp;Matt Lourens,&nbsp;Francesco Petruccione","doi":"10.1140/epjqt/s40507-026-00472-4","DOIUrl":"10.1140/epjqt/s40507-026-00472-4","url":null,"abstract":"<div><p>We present a computational method to automatically design the <i>n</i>-qubit realisations of quantum algorithms. Our approach leverages a domain-specific language (DSL) that enables the construction of quantum circuits via modular building blocks, making it well-suited for evolutionary search. In this DSL quantum circuits are abstracted beyond the usual gate-sequence description and scale automatically to any problem size. This enables us to learn the algorithm structure rather than a specific unitary implementation. We demonstrate our method by automatically designing three known quantum algorithms—the Quantum Fourier Transform, the Deutsch-Jozsa algorithm, and Grover’s search. Remarkably, we were able to learn the general implementation of each algorithm by considering examples of circuits containing at most 5-qubits. Our method proves robust, as it maintains performance across increasingly large search spaces. Convergence to the relevant algorithm is achieved with high probability and with moderate computational resources.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00472-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147362983","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}

{"title":"Quantum-lattice synergy: a next-generation blueprint for post-quantum cloud security","authors":"Hatoon S. AlSagri,&nbsp;Ankit Kumar,&nbsp;Abdul Khader Jilani Saudagar,&nbsp;Abhishek Kumar,&nbsp;Linesh Raja","doi":"10.1140/epjqt/s40507-026-00468-0","DOIUrl":"10.1140/epjqt/s40507-026-00468-0","url":null,"abstract":"<div><p>Quantum computing poses a fundamental threat to the classical cryptographic mechanisms that underpin contemporary cloud security, motivating an urgent transition toward post-quantum solutions. This study introduces Quantum-Lattice Synergy (QLS), a next-generation security blueprint that integrates the computational hardness of lattice-based cryptography with the information-theoretic guarantees of quantum cryptographic primitives. QLS is a mix of Learning with Errors (LWE)-based encryption, quantum key distribution (QKD), and quantum-generated randomness to offer robust and scalable with resilience to future protection of cloud infrastructures. The architecture consists of three modules which are closely interrelated, namely, QLS-KG to generate quantum-lattice hybrid keys, QLS-Enc for lattice-based encryption with quantum-derived keys, and QLS-Auth to achieve secure authentication with quantum hashing and lattice trapdoors. Through rigorous mathematical modelling, security proofs and complexity analysis, it has been demonstrated that QLS provides a dual-layered defence which provides, at the computational level, computational security based on hard lattice problems, and at the physical level, physical security based on quantum mechanics. It has been experimentally shown that QLS is more efficient in key generation, encryption, and decryption compared to the state-of-the-art post-quantum protocols, such as LWE-based encryption, NTRU Encrypt, and Kyber512, depending on the quantum-assisted keying and parameterizing lattices, and achieving the same level of classical symmetric-key security at 256 bits. This characterization of security is not intended to mean an AES-256 baseline or to exclude the ability of existent schemes to meet similar security levels in the right configurations, it simply indicates that QLS has a strength in its hybrid, defence-in-depth architecture. QLS is created in a way that it can be deployed in the context of existing cloud facilities, which tackles durability of confidentiality, future economics, scalability and reliability of trust during the post-quantum era.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00468-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147335980","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}

{"title":"A cross-chain model with underlying security and scalability based on quantum algorithm","authors":"Zhuo Wang,&nbsp;Jian Li,&nbsp;Ang Liu,&nbsp;Mianxiong Dong,&nbsp;Yanyan Hou","doi":"10.1140/epjqt/s40507-025-00462-y","DOIUrl":"10.1140/epjqt/s40507-025-00462-y","url":null,"abstract":"<div><p>Cross-chain relay architectures face critical security gaps: centralized trust dependencies, consensus vulnerabilities, and potential quantum threats. We propose the Quantum Cross-Chain (QCC) model—a post-quantum secure framework integrating quantum cryptography at the foundational layer. QCC establishes a global identity registry for heterogeneous chains and introduces a Two-Way Identity Authentication (TIA) protocol using GHZ entanglement, enabling information-theoretically secure mutual verification in a single execution. To fortify transaction integrity, we design a Quantum Ring Signature (QRS) scheme with novel key-loss security, ensuring that compromised keys cannot forge valid signatures. Unlike conventional systems that rely on smart contract autonomy, QCC delegates security to quantum one-way functions and distributed auditing, synchronizing consensus transmission with cryptographic validation. Formal verification proves composite security bounded by <span>(mathrm{negl} (n)+ mathrm{negl} (q))</span>, while simulations demonstrate stable throughput (78.5 TPS) and predictable latency (130 ms) under variable network conditions. QCC achieves post-quantum resilience, decentralized auditability, and linear scalability, providing a practical blueprint for next-generation cross-chain infrastructure.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-025-00462-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342623","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}

{"title":"Effects of hyperfine splitting on 1470 nm active optical clock with cesium atoms","authors":"Deshui Yu,&nbsp;Baolin Zhang,&nbsp;Tiantian Shi,&nbsp;Shougang Zhang,&nbsp;Jingbiao Chen","doi":"10.1140/epjqt/s40507-026-00471-5","DOIUrl":"10.1140/epjqt/s40507-026-00471-5","url":null,"abstract":"<div><p>Active optical clocks, benefiting from the substantially reduced cavity pulling and spectrally narrowed linewidth of bad-cavity lasers, possess the potential of simplifying clock structure and operation and facilitating broad out-of-the-lab applications. Thus far, the studies on active optical clocks with alkali-metal gain media have mainly relied on the oversimplified physical model of two-level atoms interacting with a low-<i>Q</i> optical cavity, omitting the effects of hyperfine splitting of the fine-structure laser transition on the clock operation. Here, we take the 1470 nm active optical clock with cesium atoms as an example and numerically investigate the clock performance in the presence of hyperfine splitting. The simulation results illustrate that multiple hyperfine laser transitions can cause a laser frequency shift at the level of hundreds of kilohertz under typical operation conditions. Nevertheless, the frequency stability may reach <span>(2.2times 10^{-14}/sqrt{tau })</span>, much better than that of recently demonstrated chip-scale optical clocks. Our work shows the non-negligible influence of hyperfine splitting on the performance of active optical clocks and offers important insights for the design of future experiments.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00471-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342610","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}

{"title":"Low crosstalk in a scalable superconducting quantum lattice","authors":"Mohammed Alghadeer,&nbsp;Shuxiang Cao,&nbsp;Simone D. Fasciati,&nbsp;Michele Piscitelli,&nbsp;Paul C. Gow,&nbsp;James C. Gates,&nbsp;Mustafa Bakr,&nbsp;Peter J. Leek","doi":"10.1140/epjqt/s40507-026-00465-3","DOIUrl":"10.1140/epjqt/s40507-026-00465-3","url":null,"abstract":"<div><p>Superconducting quantum circuits are a key platform for advancing quantum information processing and simulation. Scaling efforts currently encounter challenges such as Josephson-junction fabrication yield, design frequency targeting, and long-range crosstalk arising both from spurious microwave modes and intrinsic interactions between qubits. We demonstrate a scalable 4x4 square lattice with low crosstalk, comprising 16 fixed-frequency transmon qubits with nearest-neighbor capacitive coupling that is implemented in a tileable, 3D-integrated circuit architecture with off-chip inductive shunting to mitigate spurious enclosure modes. We report on the design and comprehensive characterization, and show that our implementation achieves targeted device parameters with very low frequency spreads, long-range parasitic couplings and simultaneous single-qubit gate errors across the device. Our results provide a promising pathway toward a scalable superconducting square lattice topology for quantum error correction and simulation.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00465-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342063","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}

{"title":"Quantum-driven enhanced machine learning algorithm for intrusion detection in Internet of things environment","authors":"Indira Bharathi,&nbsp;Veeramani Sonai,&nbsp;Sridevi S","doi":"10.1140/epjqt/s40507-026-00463-5","DOIUrl":"10.1140/epjqt/s40507-026-00463-5","url":null,"abstract":"<div><p>Industry 4.0 and other advancements are made possible by an Internet of Things (IoT), one of the emerging technologies. In addition, security becomes a difficult problem when IoT devices communicate over wireless channels. It has recently been feasible to detect intrusion in an IoT environment using machine learning techniques. The amount of computation needed for training grows dramatically with huge volume of data. As the amount of data increases, the running time of many machine learning algorithms increases drastically. At the intersection of traditional machine learning and quantum computing, quantum machine learning promises to revolutionize the processing and analysis of large data sets by utilizing the special benefits of quantum physics. This work introduces Hybrid Quantum Neural Network (HQNN) contrived for overcoming these challenges and facilitate efficient Quantum enabled machine learning for real time intrusion detection systems. Real network traces are used to validate our proposed intrusion detection technology and our approach shows remarkable improvement in accuracy against conventional approaches.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"13 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjqt/s40507-026-00463-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342064","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}