Quantum Science and Technology最新文献_第2页

Ensemble-based quantum token protocol benchmarked on IBM quantum processors 基于集成的量子令牌协议在IBM量子处理器上进行基准测试

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-23 DOI: 10.1088/2058-9565/ae03e6

Lucas Tsunaki, Bernd Bauerhenne, Malwin Xibraku, Martin E Garcia, Kilian Singer and Boris Naydenov

{"title":"Ensemble-based quantum token protocol benchmarked on IBM quantum processors","authors":"Lucas Tsunaki, Bernd Bauerhenne, Malwin Xibraku, Martin E Garcia, Kilian Singer and Boris Naydenov","doi":"10.1088/2058-9565/ae03e6","DOIUrl":"https://doi.org/10.1088/2058-9565/ae03e6","url":null,"abstract":"Quantum tokens envision to store unclonable quantum states in a physical device, with the goal of being used for personal authentication protocols, as required by banks. Still, the experimental realization of such devices faces many technical challenges, which can be partially mitigated using ensembles instead of single qubits. In this work, we thus propose an ensemble-based quantum token protocol, describing it through a simple yet general model based on a quantum mechanical observable. The protocol is benchmarked on five IBM quantum processors and a general hacker attack scenario is analyzed, in which the attacker attempts to read the bank token and forge a fake one, based on the information gained from this measurement. We experimentally demonstrate that the probability that the bank erroneously accepts a forged coin composed of multiple tokens can reach values below 10−22, while the probability that the bank accepts its own coin is above 0.999. The overall security of the protocol is therefore demonstrated within a hardware-agnostic framework, confirming the practical viability of the protocol in arbitrary quantum systems and thus paving the way for future applications with different ensembles of qubits, such as color center defects in solids.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"84 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145127578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Compressed-sensing Lindbladian quantum tomography with trapped ions 捕获离子的压缩传感Lindbladian量子层析成像

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-22 DOI: 10.1088/2058-9565/ae0363

Dmitrii Dobrynin, Lorenzo Cardarelli, Markus Müller and Alejandro Bermudez

{"title":"Compressed-sensing Lindbladian quantum tomography with trapped ions","authors":"Dmitrii Dobrynin, Lorenzo Cardarelli, Markus Müller and Alejandro Bermudez","doi":"10.1088/2058-9565/ae0363","DOIUrl":"https://doi.org/10.1088/2058-9565/ae0363","url":null,"abstract":"Characterizing the dynamics of quantum systems is a central task for the development of quantum information processors (QIPs). It serves to benchmark different devices, learn about their specific noise, and plan the next hardware upgrades. However, this task is also very challenging, for it requires a large number of measurements and time-consuming classical processing. Moreover, when interested in the time dependence of the noise, there is an additional overhead since the characterization must be performed repeatedly within the time interval of interest. To overcome this limitation while, at the same time, ordering the learned sources of noise by their relevance, we focus on the inference of the dynamical generators of the noisy dynamics using Lindbladian quantum tomography (LQT). We propose two different improvements of LQT that alleviate previous shortcomings. In the weak-noise regime of current QIPs, we manage to linearize the maximum likelihood estimation of LQT, turning the constrained optimization into a convex problem to reduce the classical computation cost and to improve its robustness. Moreover, by introducing compressed sensing techniques, we reduce the number of required measurements without sacrificing accuracy. To illustrate these improvements, we apply our LQT tools to trapped-ion experiments of single- and two-qubit gates, advancing in this way the previous state of the art.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"28 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145116375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Suppressing quantum errors by noise-aware circuit design 噪声感知电路设计抑制量子误差

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-21 DOI: 10.1088/2058-9565/ae05c4

Yi Hu, Congcong Zheng, Xiaojun Wang, Fanxu Meng, Xutao Yu and Zaichen Zhang

{"title":"Suppressing quantum errors by noise-aware circuit design","authors":"Yi Hu, Congcong Zheng, Xiaojun Wang, Fanxu Meng, Xutao Yu and Zaichen Zhang","doi":"10.1088/2058-9565/ae05c4","DOIUrl":"https://doi.org/10.1088/2058-9565/ae05c4","url":null,"abstract":"Suppressing errors is one of the central challenges in achieving reliable quantum computation on near-term hardware. While much attention has been paid to error correction and mitigation, we identify quantum circuit structure itself as a powerful lever for proactive error suppression. In this work, we present a unified and hardware-adaptive framework for noise-aware quantum circuit design, in which circuit topology and parameters are co-optimized from the ground up based on the noise profile of the target backend. Our framework supports a wide range of quantum tasks-including circuit compilation, quantum state preparation, and unitary approximation-under a consistent optimization paradigm. Extensive experiments on five IBM backends confirm the effectiveness of our method, showing significant fidelity gains across all tasks under realistic noise. These results demonstrate that noise suppression through structure-aware design offers a powerful and generalizable strategy for enhancing circuit performance on NISQ hardware. Our framework bridges low-level hardware constraints with high-level circuit synthesis, paving the way for more robust and efficient quantum programming in the presence of noise.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"22 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145103589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Leveraging quantum statistics to enhance heat engines 利用量子统计来增强热机

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-18 DOI: 10.1088/2058-9565/ae01d3

Keerthy Menon, Thomas Busch and Thomás Fogarty

{"title":"Leveraging quantum statistics to enhance heat engines","authors":"Keerthy Menon, Thomas Busch and Thomás Fogarty","doi":"10.1088/2058-9565/ae01d3","DOIUrl":"https://doi.org/10.1088/2058-9565/ae01d3","url":null,"abstract":"A key focus of designing quantum thermal devices is the potential advantage that can be gleaned from genuine quantum effects when compared to classical devices. The recent experimental realization of the Pauli engine (Koch et al 2023 Nature621 723)—where energy is extracted via changes in particle statistics as an alternative to conventional heat sources—has opened new avenues of research where quantum statistics can be considered as a thermodynamic resource. In this work we propose hybrid quantum heat engines which can utilize additional strokes that change the single particle statistics between bosonic and fermionic descriptions during the cycle. To accomplish this we consider the 1D Lieb–Liniger gas, in which the s-wave interactions can be tuned between the non-interacting and the hard-core limit, which are described by bosonic and fermionic statistics respectively. We show that by suitably choosing where to implement these statistical strokes during an Otto-like cycle in the quasi-static limit, the efficiency and work output can be significantly enhanced when compared to fully bosonic or fully fermionic engines. Furthermore, in the degenerate regime our engine can operate at the Carnot efficiency, due to the interplay between the different contributions of heat and work induced by the statistical strokes. Finally, we highlight how our thermodynamic cycles can realize other thermal operations, such as refrigerators, promising similar statistical enhancements for a wide range of temperatures.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"5 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Cavity polariton blockade for non-local entangling gates with trapped atoms 具有被困原子的非局域纠缠门的腔极化子封锁

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-17 DOI: 10.1088/2058-9565/adfd79

Vineesha Srivastava, Sven Jandura, Gavin K Brennen and Guido Pupillo

引用次数: 0

Experimental realization of deterministic and selective photon addition in a bosonic mode assisted by an ancillary qubit 辅助量子比特辅助下玻色子模式下确定性和选择性光子加法的实验实现

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-17 DOI: 10.1088/2058-9565/ae0519

Marina Kudra, Martin Jirlow, Mikael Kervinen, Axel M Eriksson, Fernando Quijandría, Per Delsing, Tahereh Abad and Simone Gasparinetti

{"title":"Experimental realization of deterministic and selective photon addition in a bosonic mode assisted by an ancillary qubit","authors":"Marina Kudra, Martin Jirlow, Mikael Kervinen, Axel M Eriksson, Fernando Quijandría, Per Delsing, Tahereh Abad and Simone Gasparinetti","doi":"10.1088/2058-9565/ae0519","DOIUrl":"https://doi.org/10.1088/2058-9565/ae0519","url":null,"abstract":"Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss. To correct for this type of error, one can encode the logical qubit in code spaces with a definite photon parity, such as cat codes or binomial codes. Error correction requires a recovery operation that maps the error states—which have opposite parity—back onto the code space. Here, we realize a collection of photon-number-selective, simultaneous photon addition operations on a bosonic mode, a microwave cavity, assisted by a superconducting qubit. These operations are implemented as two-photon transitions that excite the cavity and the qubit at the same time. The additional degree of freedom of the qubit makes it possible to implement a coherent, unidirectional mapping between spaces of opposite photon parity. We present the successful experimental implementation of the drives and the phase control they enable on superpositions of Fock states. The presented technique, when supplemented with qubit reset, is suitable for autonomous quantum error correction in bosonic systems and, more generally, opens the possibility to realize a range of non-unitary transformations on a bosonic mode.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"49 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Hybrid discrimination strategy in quantum communication based on photon-number-resolving detectors and mesoscopic twin-beam states 基于光子数分辨探测器和介观双光束态的量子通信混合鉴别策略

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-17 DOI: 10.1088/2058-9565/ae05c3

Luca Razzoli, Alex Pozzoli and Alessia Allevi

{"title":"Hybrid discrimination strategy in quantum communication based on photon-number-resolving detectors and mesoscopic twin-beam states","authors":"Luca Razzoli, Alex Pozzoli and Alessia Allevi","doi":"10.1088/2058-9565/ae05c3","DOIUrl":"https://doi.org/10.1088/2058-9565/ae05c3","url":null,"abstract":"State discrimination is a key challenge in the implementation of quantum communication protocols. Most optical communication protocols rely on either coherent states of light or fragile single-photon states, making it often difficult to achieve robustness and security simultaneously. In this work, we propose a hybrid strategy that operates in the mesoscopic intensity regime, leveraging robust quantum states of light. Our approach combines classical and quantum features: reliable state discrimination based on a classical property of light, and security stemming from nonclassical correlations. Specifically, the receiver uses photon-number-resolving detectors to access the mean photon number of the binary thermal signals encoding the information. The communication channel exploits twin-beam states, inherently sensitive to eavesdropping attacks, to provide a layer of security. This strategy is scalable, allowing for straightforward extension to more complex signal alphabets, and offers a promising route for robust and secure quantum communication in the mesoscopic intensity domain.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"73 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Typical machine learning datasets as low-depth quantum circuits 典型的机器学习数据集是低深度量子电路

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-14 DOI: 10.1088/2058-9565/ae0123

Florian J Kiwit, Bernhard Jobst, Andre Luckow, Frank Pollmann and Carlos A Riofrío

{"title":"Typical machine learning datasets as low-depth quantum circuits","authors":"Florian J Kiwit, Bernhard Jobst, Andre Luckow, Frank Pollmann and Carlos A Riofrío","doi":"10.1088/2058-9565/ae0123","DOIUrl":"https://doi.org/10.1088/2058-9565/ae0123","url":null,"abstract":"Quantum machine learning (QML) is an emerging field that investigates the capabilities of quantum computers for learning tasks. While QML models can theoretically offer advantages such as exponential speed-ups, challenges in data loading and the ability to scale to relevant problem sizes have prevented demonstrations of such advantages on practical problems. In particular, the encoding of arbitrary classical data into quantum states usually comes at a high computational cost, either in terms of qubits or gate count. However, real-world data typically exhibits some inherent structure (such as image data) which can be leveraged to load them with a much smaller cost on a quantum computer. This work further develops an efficient algorithm for finding low-depth quantum circuits to load classical image data as quantum states. To evaluate its effectiveness, we conduct systematic studies on the MNIST, Fashion-MNIST, CIFAR-10, and Imagenette datasets. The corresponding circuits for loading the full large-scale datasets are available publicly as PennyLane datasets and can be used by the community for their own benchmarks. We further analyze the performance of various quantum classifiers, such as quantum kernel methods, parameterized quantum circuits, and tensor-network classifiers, and we compare them to convolutional neural networks. In particular, we focus on the performance of the quantum classifiers as we introduce nonlinear functions of the input state, e.g. by letting the circuit parameters depend on the input state.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"34 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Systematic nonuniform field effects in miniature atomic co-magnetometers 微型原子共磁仪的系统非均匀场效应

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-11 DOI: 10.1088/2058-9565/adffb0

L M Ellis, M Jayaseelan, L M Rushton, J D Zipfel, P Bevington, B Steele, G Quick, W Chalupczak and V Guarrera

引用次数: 0

Electro-optic sampling of the electric-field operator for ultrabroadband pulses of Gaussian quantum light 高斯量子光超宽带脉冲电场算子的电光采样

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-09-10 DOI: 10.1088/2058-9565/ae00ed

Geehyun Yang, Sandeep Sharma and Andrey S Moskalenko

引用次数: 0