Advanced quantum technologies最新文献_第4页

Zeptosecond-Scale Single-Photon Gyroscope 七秒级单光子陀螺仪

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-08 DOI: 10.1002/qute.202400166

Fabrizio Sgobba, Danilo Triggiani, Vincenzo Tamma, Paolo De Natale, Gianluca Gagliardi, Saverio Avino, Luigi Santamaria Amato

{"title":"Zeptosecond-Scale Single-Photon Gyroscope","authors":"Fabrizio Sgobba, Danilo Triggiani, Vincenzo Tamma, Paolo De Natale, Gianluca Gagliardi, Saverio Avino, Luigi Santamaria Amato","doi":"10.1002/qute.202400166","DOIUrl":"10.1002/qute.202400166","url":null,"abstract":"This work presents an all-fiber telecom-range optical gyroscope employing a spontaneous parametric down conversion crystal to produce ultra-low intensity thermal light by tracing-out one of the heralded photons. The prototype exhibits a detection limit on photon delay measurements of 249 zs over a 72 s averaging time and 26 zs in differential delay measurements at <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>t</mi>\u0000 <mo>=</mo>\u0000 <msup>\u0000 <mn>10</mn>\u0000 <mn>4</mn>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$t=10^4$</annotation>\u0000 </semantics></math> s averaging. The detection scheme proves to be the most resource-efficient possible, saturating <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>></mo>\u0000 <mn>99.5</mn>\u0000 <mo>%</mo>\u0000 </mrow>\u0000 <annotation>$&gt;99.5%$</annotation>\u0000 </semantics></math> of the Cramér–Rao bound. These results are groundbreaking in the context of low-photon regime quantum metrology, paving the way to novel experimental configurations to bridge quantum optics with special or general relativity.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quadratic Speed-ups in Quantum Kernelized Binary Classification 量子核化二进制分类的二次方提速

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-08 DOI: 10.1002/qute.202400126

Jungyun Lee, Daniel K. Park

{"title":"Quadratic Speed-ups in Quantum Kernelized Binary Classification","authors":"Jungyun Lee, Daniel K. Park","doi":"10.1002/qute.202400126","DOIUrl":"10.1002/qute.202400126","url":null,"abstract":"Classification is at the core of data-driven prediction and decision-making, representing a fundamental task in supervised machine learning. Recently, several quantum machine learning algorithms that use quantum kernels as a measure of similarities between data have emerged to perform binary classification on datasets encoded as quantum states. The potential advantages of quantum kernels arise from the ability of quantum computers to construct kernels that are more effective than their classical counterparts in capturing patterns in data or computing kernels more efficiently. However, existing quantum kernel-based classification algorithms do not harness the capability of having data samples in quantum superposition for additional enhancements. This work demonstrates how such capability can be leveraged in quantum kernelized binary classifiers (QKCs) through Quantum Amplitude Estimation (QAE) for quadratic speed-up. Additionally, new quantum circuits are proposed for the QKCs in which the number of qubits is reduced by one, and the circuit depth is reduced linearly with respect to the number of sample data. The quadratic speed-up over previous methods is verified through numerical simulations on the Iris dataset.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400126","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Battery in the Heisenberg Spin Chain Models with Dzyaloshinskii-Moriya Interaction 具有 Dzyaloshinskii-Moriya 相互作用的海森堡自旋链模型中的量子电池

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-08 DOI: 10.1002/qute.202400114

Xiang-Long Zhang, Xue-Ke Song, Dong Wang

引用次数: 0

Observation of Room Temperature Exchange Cavity Magnon-Polaritons in Metallic Thin Films 金属薄膜中的室温交换腔磁极子观测

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-06 DOI: 10.1002/qute.202300420

Mawgan A. Smith, Adam L. Lafferty, Alban Joseph, Matthew R. McMaster, Jade N. Scott, William R. Hendren, Robert M. Bowman, Martin P. Weides, Rair Macêdo

{"title":"Observation of Room Temperature Exchange Cavity Magnon-Polaritons in Metallic Thin Films","authors":"Mawgan A. Smith, Adam L. Lafferty, Alban Joseph, Matthew R. McMaster, Jade N. Scott, William R. Hendren, Robert M. Bowman, Martin P. Weides, Rair Macêdo","doi":"10.1002/qute.202300420","DOIUrl":"10.1002/qute.202300420","url":null,"abstract":"Cavity magnonics has become an intriguing field due to its potential to enable next-generation technologies centered around controlling information exchange in hybrid resonant systems. Investigating the tunability of magnon-photon coupling is key to advancing the field. Here, the observation of coupling between the first order magnon mode in a metallic thin film with a cavity photon mode is reported. An electromagnetic perturbation theory that takes account of perpendicular standing spin waves and their respective dissipation is utilized to estimate the coupling strength. The metallic thin film exhibits notably lower dissipation for the higher-order magnon mode, which is not observed in a thin film magnetic insulator. As such, and given that metallic Kittel magnons typically exhibit lower coherence times than their insulator counterparts, the excitation and coupling to specific higher order modes could lengthen these times compared to previous observations, which may be useful for future integration into quantum devices.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202300420","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trajectory Tracking of Stochastic Open Quantum Systems Based on Online Estimated State Feedback Control 基于在线估计状态反馈控制的随机开放量子系统轨迹跟踪

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-06 DOI: 10.1002/qute.202300217

Shuang Cong, Yuqiu Zhou

引用次数: 0

Solid-State Qubit as an On-Chip Controller for Non-Classical Field States 固态 Qubit 作为非经典场态的片上控制器

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-03 DOI: 10.1002/qute.202400141

Roman V. Zakharov, Olga V. Tikhonova, Nikolay V. Klenov, Igor I. Soloviev, Vladimir N. Antonov, Dmitry S. Yakovlev

{"title":"Solid-State Qubit as an On-Chip Controller for Non-Classical Field States","authors":"Roman V. Zakharov, Olga V. Tikhonova, Nikolay V. Klenov, Igor I. Soloviev, Vladimir N. Antonov, Dmitry S. Yakovlev","doi":"10.1002/qute.202400141","DOIUrl":"10.1002/qute.202400141","url":null,"abstract":"A basic element of a quantum network based on two single-mode waveguides is proposed with different frequencies connected by a solid-state qubit. Using a simple example of a possible superconducting implementation, the usefulness of the simplifications used in the general theoretical consideration has been justified. The non-classical field in a single-mode with a frequency of <math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>ω</mi>\u0000 <mn>1</mn>\u0000 </msub>\u0000 <annotation>$omega _1$</annotation>\u0000 </semantics></math> is fed to the input of a qubit controller and transformed into a non-classical field in an output single-mode with a frequency of <math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>ω</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <annotation>$omega _2$</annotation>\u0000 </semantics></math>. The interface can establish a quantum connection between solid-state and photonic flying qubits with adjustable pulse shapes and carrier frequencies. This allows quantum information to be transferred to other superconducting or atomic-based quantum registers or chips. The peculiarities of the wave-qubit interactions are described, showing how they help to control the quantum state of the non-classical field. On this basis, the operating principles of solid-state and flying qubits for the future quantum information platforms are considered.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400141","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Almost Deterministic Cooling by Measurements 通过测量实现几乎确定性的冷却

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-02 DOI: 10.1002/qute.202300435

Jia-shun Yan, Jun Jing

{"title":"An Almost Deterministic Cooling by Measurements","authors":"Jia-shun Yan, Jun Jing","doi":"10.1002/qute.202300435","DOIUrl":"10.1002/qute.202300435","url":null,"abstract":"Nondeterministic measurement-based techniques are efficient in reshaping the population distribution of a quantum system but suffer from a limited success probability of holding the system in the target state. To save the experimental cost, a two-step protocol is proposed to cool a resonator down to the ground state with a near-unit probability by exploiting the state-engineering mechanisms of both conditional and unconditional measurements on an ancillary qubit. In the first step, the unconditional measurements on the ancillary qubit are applied to reshape the target resonator from a thermal state to a reserved Fock state. The measurement sequence can be efficiently optimized by reinforcement learning for maximum fidelity. In the second step, the population on the reserved state can be faithfully transferred in a stepwise way to the resonator's ground state with a near-unit fidelity by the conditional measurements on the qubit. Properly designing the projection operator and the measurement interval enables the Kraus operator to act as a lowering operator for neighboring Fock states. Through dozens of measurements in all, the initial thermal average population of the resonator can be reduced by five orders in magnitude with a success probability of over 95%.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551905","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

Proving the Security of Mediated Semi-Quantum Key Distribution Using Entropic Uncertainty Relation 利用熵不确定性关系证明中介半量子密钥分发的安全性

IF 4.4

Advanced quantum technologies Pub Date : 2024-07-02 DOI: 10.1002/qute.202400190

Zhen-Ye Du, You-Long Yang, Tong Ning, Kai-Tian Gao

引用次数: 0

Magnon-Squeezing-Enhanced Phonon Lasering in Cavity Magnomechanics 腔体磁力学中的磁子挤压增强型声子激光技术

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-27 DOI: 10.1002/qute.202400200

Qing-Feng Zhang, Yue-Ru Zhou, Fei-Fei Liu, Xue-Yan Wang, Yong-Pan Gao, Ling Fan, Cong Cao

引用次数: 0

A Scalable Quantum Gate-Based Implementation for Causal Hypothesis Testing 基于量子门的因果假设检验可扩展实现

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-24 DOI: 10.1002/qute.202300326

Akash Kundu, Tamal Acharya, Aritra Sarkar

引用次数: 0