Advanced Quantum Technologies最新文献

Implementation of Entanglement Witnesses with Quantum Circuits 用量子电路实现纠缠见证

Advanced Quantum Technologies Pub Date : 2024-09-13 DOI: 10.1002/qute.202400272

Shu‐Qian Shen, Xin‐Qi Gao, Rui‐Qi Zhang, Ming Li, Shao‐Ming Fei

引用次数: 0

Enhancing the Sensitivity of Quantum Fiber‐Optical Gyroscope via a Non‐Gaussian‐State Probe 通过非高斯状态探测器提高量子光纤陀螺仪的灵敏度

Advanced Quantum Technologies Pub Date : 2024-09-13 DOI: 10.1002/qute.202400270

Wen‐Xun Zhang, Rui Zhang, Yunlan Zuo, Le‐Man Kuang

{"title":"Enhancing the Sensitivity of Quantum Fiber‐Optical Gyroscope via a Non‐Gaussian‐State Probe","authors":"Wen‐Xun Zhang, Rui Zhang, Yunlan Zuo, Le‐Man Kuang","doi":"10.1002/qute.202400270","DOIUrl":"https://doi.org/10.1002/qute.202400270","url":null,"abstract":"A theoretical scheme to enhance the sensitivity of a quantum fiber‐optical gyroscope (QFOG) via a non‐Gaussian‐state probe based on quadrature measurements of the optical field is proposed. The non‐Gaussian‐state probe utilizes the product state comprising a photon‐added coherent state (PACS) with photon excitations and a coherent state (CS). The sensitivity of the QFOG is studied and it is found that it can be significantly enhanced through increasing the photon excitations in the PACS probe. The influence of photon loss on the performance of QFOG is investigated and it is demonstrated that the PACS probe exhibits robust resistance to photon loss. Furthermore, the performance of the QFOG using the PACS probe against two Gaussian‐state probes: the CS probe and the squeezed state (SS) probe is compared and it is indicated that the PACS probe offers a significant advantage in terms of sensitivity, regardless of photon loss, under the constraint condition of the same total number of input photons. Particularly, it is found that the sensitivity of the PACS probe can be three orders of magnitude higher than that of two Gaussian‐state probes for certain values of the measured parameter. The capabilities of the non‐Gaussian state probe in enhancing the sensitivity and resisting photon loss can have a wide‐ranging impact on future high‐performance QFOGs.","PeriodicalId":501028,"journal":{"name":"Advanced Quantum Technologies","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142262889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum Effect Enables Large Elastocaloric Effect in Monolayer MoSi2N4${rm MoSi}_2{rm N}_4$ and Graphene 量子效应在单层 MoSi2N4${rm MoSi}_2{rm N}_4$ 和石墨烯中产生巨大的弹性效应

Advanced Quantum Technologies Pub Date : 2024-09-10 DOI: 10.1002/qute.202400391

Yan Yin, Weiwei He, Wei Tang, Min Yi

{"title":"Quantum Effect Enables Large Elastocaloric Effect in Monolayer MoSi2N4${rm MoSi}_2{rm N}_4$ and Graphene","authors":"Yan Yin, Weiwei He, Wei Tang, Min Yi","doi":"10.1002/qute.202400391","DOIUrl":"https://doi.org/10.1002/qute.202400391","url":null,"abstract":"Low‐dimensional materials with outstanding heat conductivity and elastocaloric effect (eCE) are significant for environmentally friendly and energy‐efficient nano refrigerators. However, most of elastocaloric materials with first/second‐order phase transition suffer from hysteresis loss. Herein, an emerging monolayer is theoretically demonstrated as a promising candidate, which exhibits no hysteresis loss enabled by reversible elastic response, as well as large eCE and high eC strength enabled by quantum effect (QE). Considering the remarkable influence of QE and thermo‐mechanical coupling (TMC) in the monolayer limit, the adiabatic temperature change () is evaluate by incorporating QE and TMC. Molecular dynamics simulation significantly underestimates , whereas method with QE slightly overestimates when compared to method with QE+TMC. At 300 K, of is –(11–42) K under biaxial tensile forces of 26–84 nN. The elastocaloric coefficients are –(0.3–0.9) , comparable to that of armchair carbon nanotubes. A large eCE ( around 15 K under a biaxial tensile load of 35 nN) is also revealed for graphene by incorporating QE and TMC. This study proposes a more comprehensive method for quantitatively predicting eCE in 2D materials by including QE and TMC, offering a theoretical guideline for refrigerating materials in the monolayer limit.","PeriodicalId":501028,"journal":{"name":"Advanced Quantum Technologies","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic Phase Enabled Topological Mode Steering in Composite Su‐Schrieffer–Heeger Waveguide Arrays 复合 Su-Schrieffer-Heeger 波导阵列中的动态相位拓扑模式转向

Advanced Quantum Technologies Pub Date : 2024-09-07 DOI: 10.1002/qute.202400390

Min Tang, Chi Pang, Christian N. Saggau, Haiyun Dong, Ching Hua Lee, Ronny Thomale, Sebastian Klembt, Ion Cosma Fulga, Jeroen van den Brink, Yana Vaynzof, Oliver G. Schmidt, Jiawei Wang, Libo Ma

引用次数: 0

Variational Quantum Algorithm‐Preserving Feasible Space for Solving the Uncapacitated Facility Location Problem 解决无障碍设施位置问题的变式量子算法--保留可行空间

Advanced Quantum Technologies Pub Date : 2024-09-02 DOI: 10.1002/qute.202400201

Sha‐Sha Wang, Hai‐Ling Liu, Yong‐Mei Li, Fei Gao, Su‐Juan Qin, Qiao‐Yan Wen

{"title":"Variational Quantum Algorithm‐Preserving Feasible Space for Solving the Uncapacitated Facility Location Problem","authors":"Sha‐Sha Wang, Hai‐Ling Liu, Yong‐Mei Li, Fei Gao, Su‐Juan Qin, Qiao‐Yan Wen","doi":"10.1002/qute.202400201","DOIUrl":"https://doi.org/10.1002/qute.202400201","url":null,"abstract":"The Quantum Alternating Operator Ansatz (QAOA+) is one of the Variational Quantum Algorithm (VQA) specifically developed to tackle combinatorial optimization problems by exploring the feasible space in search of a target solution. For the Constrained Binary Optimization with Unconstrained Variables Problems (CBO‐UVPs), the mixed operators in the QAOA+ circuit are applied to the constrained variables, while the single‐qubit rotating gates operate on the unconstrained variables. The expressibility of this circuit is limited by the shortage of two‐qubit gates and the parameter sharing in the single‐qubit rotating gates, which consequently impacts the performance of QAOA+ for solving CBO‐UVPs. Therefore, it is crucial to develop a suitable ansatz for CBO‐UVPs. In this paper, the Variational Quantum Algorithm‐Preserving Feasible Space (VQA‐PFS) ansatz is proposed, exemplified by the Uncapacitated Facility Location Problem (UFLP), that applies mixed operators on constrained variables while employing Hardware‐Efficient Ansatz (HEA) on unconstrained variables. The numerical results demonstrate that VQA‐PFS significantly enhances the probability of success and exhibits faster convergence than QAOA+, Quantum Approximation Optimization Algorithm (QAOA), and HEA. Furthermore, VQA‐PFS reduces the circuit depth dramatically compared to QAOA+ and QAOA. The algorithm is general and instructive in tackling CBO‐UVPs.","PeriodicalId":501028,"journal":{"name":"Advanced Quantum Technologies","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Solid‐State Quantum Emitters 固态量子发射器

Advanced Quantum Technologies Pub Date : 2024-08-12 DOI: 10.1002/qute.202300390

A. Mark Fox

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Quantum‐Noise‐Driven Generative Diffusion Models 量子噪声驱动的生成扩散模型

Advanced Quantum Technologies Pub Date : 2024-07-15 DOI: 10.1002/qute.202300401

Marco Parigi, Stefano Martina, Filippo Caruso

{"title":"Quantum‐Noise‐Driven Generative Diffusion Models","authors":"Marco Parigi, Stefano Martina, Filippo Caruso","doi":"10.1002/qute.202300401","DOIUrl":"https://doi.org/10.1002/qute.202300401","url":null,"abstract":"Generative models realized with Machine Learning (ML) techniques are powerful tools to infer complex and unknown data distributions from a finite number of training samples in order to produce new synthetic data. Diffusion Models (DMs) are an emerging framework that have recently overcome Generative Adversarial Networks (GANs) in creating high‐quality images. Here, is proposed and discussed the quantum generalization of DMs, i.e., three Quantum‐Noise‐Driven Generative Diffusion Models (QNDGDMs) that could be experimentally tested on real quantum systems. The idea is to harness unique quantum features, in particular the non‐trivial interplay among coherence, entanglement, and noise that the currently available noisy quantum processors do unavoidably suffer from, in order to overcome the main computational burdens of classical diffusion models during inference. Hence, the suggestion is to exploit quantum noise not as an issue to be detected and solved but instead as a beneficial key ingredient to generate complex probability distributions from which a quantum processor might sample more efficiently than a classical one. Three examples of the numerical simulations are also included for the proposed approaches. The results are expected to pave the way for new quantum‐inspired or quantum‐based generative diffusion algorithms addressing tasks as data generation with widespread real‐world applications.","PeriodicalId":501028,"journal":{"name":"Advanced Quantum Technologies","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coherent Microwave, Optical, and Mechanical Quantum Control of Spin Qubits in Diamond 金刚石中自旋量子位的相干微波、光学和机械量子控制

Advanced Quantum Technologies Pub Date : 2024-05-16 DOI: 10.1002/qute.202300432

Laura Orphal‐Kobin, Cem Güney Torun, Julian M. Bopp, Gregor Pieplow, Tim Schröder

{"title":"Coherent Microwave, Optical, and Mechanical Quantum Control of Spin Qubits in Diamond","authors":"Laura Orphal‐Kobin, Cem Güney Torun, Julian M. Bopp, Gregor Pieplow, Tim Schröder","doi":"10.1002/qute.202300432","DOIUrl":"https://doi.org/10.1002/qute.202300432","url":null,"abstract":"Diamond has emerged as a highly promising platform for quantum network applications. Color centers in diamond fulfill the fundamental requirements for quantum nodes: they constitute optically accessible quantum systems with long‐lived spin qubits. Furthermore, they provide access to a quantum register of electronic and nuclear spin qubits and they mediate entanglement between spins and photons. All these operations require coherent control of the color center's spin state. This review provides a comprehensive overview of the state‐of‐the‐art, challenges, and prospects of such schemes, including high‐fidelity initialization, coherent manipulation, and readout of spin states. Established microwave and optical control techniques are reviewed, and moreover, emerging methods such as cavity‐mediated spin–photon interactions and mechanical control based on spin–phonon interactions are summarized. For different types of color centers, namely, nitrogen–vacancy and group‐IV color centers, distinct challenges persist that are subject of ongoing research. Beyond fundamental coherent spin qubit control techniques, advanced demonstrations in quantum network applications are outlined, for example, the integration of individual color centers for accessing (nuclear) multiqubit registers. Finally, the role of diamond spin qubits in the realization of future quantum information applications is described.","PeriodicalId":501028,"journal":{"name":"Advanced Quantum Technologies","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141062288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interatomic Potential For Carbon Based Quantum‐Technology Applications 碳基量子技术应用的原子间潜力

Advanced Quantum Technologies Pub Date : 2024-05-03 DOI: 10.1002/qute.202300454

Malwin Xibraku, Martin E. Garcia, Bernd Bauerhenne

{"title":"Interatomic Potential For Carbon Based Quantum‐Technology Applications","authors":"Malwin Xibraku, Martin E. Garcia, Bernd Bauerhenne","doi":"10.1002/qute.202300454","DOIUrl":"https://doi.org/10.1002/qute.202300454","url":null,"abstract":"To optimize parameters for laser processing of quantum‐technology relevant materials, such as diamond, precise atomistic simulations of the light‐matter interaction on large scales (on the order of atoms) are essential. Classical empirical interatomic potentials are commonly employed for simulating such a large number of atoms, however they fail to accurately capture all relevant effects of light‐matter interaction. Conversely, ab initio methods like Density Functional Theory (DFT) can effectively incorporate quantum properties arising from photon excitations, but their applicability is limited to small systems containing at most approximately atoms. Consequently, bridging the gap between achieving DFT precision and handling millions of atoms necessitates the development of innovative classes of interatomic potentials. In this paper, the construction of a highly accurate interatomic potential for diamond is presented, derived from an extensive dataset of DFT calculations. The parameters of the interatomic potential depend on the electronic temperature (). The findings demonstrate that this newly developed interatomic potential can aptly describe the laser processing of diamond for nanophotonic applications, achieving accuracy comparable to ab initio methods for large systems.","PeriodicalId":501028,"journal":{"name":"Advanced Quantum Technologies","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140832009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Nuclear Physics in the Era of Quantum Computing and Quantum Machine Learning 量子计算和量子机器学习时代的核物理

Advanced Quantum Technologies Pub Date : 2024-05-03 DOI: 10.1002/qute.202300219

José‐Enrique García‐Ramos, Álvaro Sáiz, José M. Arias, Lucas Lamata, Pedro Pérez‐Fernández

引用次数: 0