AVS quantum science最新文献_第2页

Accelerating quantum optimal control of multi-qubit systems with symmetry-based Hamiltonian transformations 基于对称哈密顿变换的多量子位系统加速量子最优控制

AVS quantum science Pub Date : 2023-10-03 DOI: 10.1116/5.0162455

Xian Wang, Mahmut Sait Okyay, Anshuman Kumar, Bryan M. Wong

引用次数: 1

Clock transitions versus Bragg diffraction in atom-interferometric dark-matter detection 原子干涉暗物质探测中的时钟转换与布拉格衍射

AVS quantum science Pub Date : 2023-09-18 DOI: 10.1116/5.0176666

Daniel Derr, E. Giese

引用次数: 0

Quantum diamond microscope for dynamic imaging of magnetic fields 用于磁场动态成像的量子钻石显微镜

AVS quantum science Pub Date : 2023-09-12 DOI: 10.1116/5.0176317

Jiashen Tang, Zechuan Yin, C. Hart, John W. Blanchard, J. Oon, Smriti Bhalerao, J. Schloss, M. Turner, R. Walsworth

{"title":"Quantum diamond microscope for dynamic imaging of magnetic fields","authors":"Jiashen Tang, Zechuan Yin, C. Hart, John W. Blanchard, J. Oon, Smriti Bhalerao, J. Schloss, M. Turner, R. Walsworth","doi":"10.1116/5.0176317","DOIUrl":"https://doi.org/10.1116/5.0176317","url":null,"abstract":"Wide-field imaging of magnetic signals using ensembles of nitrogen-vacancy (NV) centers in diamond has garnered increasing interest due to its combination of micron-scale resolution, millimeter-scale field of view, and compatibility with diverse samples from across the physical and life sciences. Recently, wide-field NV magnetic imaging based on the Ramsey protocol has achieved uniform and enhanced sensitivity compared to conventional measurements. Here, we integrate the Ramsey-based protocol with spin-bath driving to extend the NV spin dephasing time and improve magnetic sensitivity. We also employ a high-speed camera to enable dynamic wide-field magnetic imaging. We benchmark the utility of this quantum diamond microscope (QDM) by imaging magnetic fields produced from a fabricated wire phantom. Over a 270 × 270 μm2 field of view, a median per-pixel magnetic sensitivity of 4.1(1) nT /Hz is realized with a spatial resolution ≲ 10 μm and sub-millisecond temporal resolution. Importantly, the spatial magnetic noise floor can be reduced to the picotesla scale by time-averaging and signal modulation, which enables imaging of a magnetic-field pattern with a peak-to-peak amplitude difference of about 300 pT. Finally, we discuss potential new applications of this dynamic QDM in studying biomineralization and electrically active cells.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139340993","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

Suppressing communication errors using quantum-enabled forward error correction 使用量子前向纠错抑制通信错误

AVS quantum science Pub Date : 2023-09-01 DOI: 10.1116/5.0164396

Ivan A. Burenkov, N. Fajar R. Annafianto, M. V. Jabir, Abdella Battou, Sergey V. Polyakov

引用次数: 1

Dynamic phases induced by two-level system defects on driven qubits 驱动量子位上两级系统缺陷引起的动态相位

AVS quantum science Pub Date : 2023-09-01 DOI: 10.1116/5.0159488

Yanxiang Wang, Ziyang You, Hou Ian

{"title":"Dynamic phases induced by two-level system defects on driven qubits","authors":"Yanxiang Wang, Ziyang You, Hou Ian","doi":"10.1116/5.0159488","DOIUrl":"https://doi.org/10.1116/5.0159488","url":null,"abstract":"Recent experimental evidences point to two-level defects, located in the oxides and on the interfaces of the Josephson junctions, as the major constituents of decoherence in superconducting qubits. How these defects affect the qubit evolution with the presence of external driving is less well understood since the semiclassical qubit-field coupling renders the Jaynes–Cummings model for qubit-defect coupling undiagonalizable. We analyze the decoherence dynamics in the continuous coherent state space induced by the driving and solve the master equation endowed with an extra decay-cladded driving term via a Fokker–Planck equation. The solutions for diffusion propagators as Gaussian distributions show four distinct dynamic phases: four types of convergence paths to limit cycles of varying radius by the distribution mean, which are determined by the competing external driving and the defect decays. The qubit trajectory resulted from these solutions is a super-Poissonian over displaced Fock states, which reduces to a Gibbs state of effective temperature decided by the defect at zero driving limit. Furthermore, the Poincare map shows the dependence of the rate of convergence on the initial state. In other words, the qubit evolution can serve as an indicator of the defect coupling strength through the variation of the driving strength as a parameter.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48058530","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

Investigating global and topological orders of states by local measurement and classical communication: Study on SPT phase diagrams by quantum energy teleportation 用局部测量和经典通信研究状态的全局和拓扑顺序:量子能量隐形传态对SPT相图的研究

AVS quantum science Pub Date : 2023-09-01 DOI: 10.1116/5.0164999

Kazuki Ikeda

引用次数: 0

Quantum double structure in cold atom superfluids 冷原子超流体中的量子双重结构

AVS quantum science Pub Date : 2023-09-01 DOI: 10.1116/5.0155096

Emil Génetay Johansen, Chris Vale, Tapio Simula

{"title":"Quantum double structure in cold atom superfluids","authors":"Emil Génetay Johansen, Chris Vale, Tapio Simula","doi":"10.1116/5.0155096","DOIUrl":"https://doi.org/10.1116/5.0155096","url":null,"abstract":"The theory of topological quantum computation is underpinned by two important classes of models. One is based on non-abelian Chern–Simons theory, which yields the so-called SU(2)k anyon models that often appear in the context of electrically charged quantum fluids. The physics of the other is captured by symmetry broken Yang–Mills theory in the absence of a Chern–Simons term and results in the so-called quantum double models. Extensive resources have been invested into the search for SU(2)k anyon quasi-particles, in particular, the so-called Ising anyons (k = 2) of which Majorana zero modes are believed to be an incarnation. In contrast to the SU(2)k models, quantum doubles have attracted little attention in experiments despite their pivotal role in the theory of error correction. Beyond topological error correcting codes, the appearance of quantum doubles has been limited to contexts primarily within mathematical physics, and as such, they are of seemingly little relevance for the study of experimentally tangible systems. However, recent works suggest that quantum double anyons may be found in spinor Bose–Einstein condensates. In light of this, the core purpose of this article is to provide a self-contained exposition of the quantum double structure, framed in the context of spinor condensates, by constructing explicitly the quantum doubles for various ground state symmetry groups and discuss their experimental realisability. We also derive analytically an equation for the quantum double Clebsch–Gordan coefficients from which the relevant braid matrices can be worked out. Finally, the existence of a particle-vortex duality is exposed and illuminated upon in this context.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135248468","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

Strong coupling dynamics of driven quantum systems with permanent dipoles 永久偶极子驱动量子系统的强耦合动力学

AVS quantum science Pub Date : 2023-09-01 DOI: 10.1116/5.0157714

Adam Burgess, Marian Florescu, Dominic M. Rouse

{"title":"Strong coupling dynamics of driven quantum systems with permanent dipoles","authors":"Adam Burgess, Marian Florescu, Dominic M. Rouse","doi":"10.1116/5.0157714","DOIUrl":"https://doi.org/10.1116/5.0157714","url":null,"abstract":"Many optically active systems possess spatially asymmetric electron orbitals. These generate permanent dipole moments, which can be stronger than the corresponding transition dipole moments, significantly affecting the system dynamics and creating polarized Fock states of light. We derive a master equation for these systems with an externally applied driving field by employing an optical polaron transformation that captures the photon mode polarization induced by the permanent dipoles. This provides an intuitive framework to explore their influence on the system dynamics and emission spectrum. We find that permanent dipoles introduce multiple-photon processes and a photon sideband, which causes substantial modifications to single-photon transition dipole processes. In the presence of an external drive, permanent dipoles lead to an additional process that we show can be exploited to control the decoherence and transition rates. We derive the emission spectrum of the system, highlighting experimentally detectable signatures of optical polarons, and measurements that can identify the parameters in the system Hamiltonian, the magnitude of the differences in the permanent dipoles, and the steady-state populations of the system.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135587937","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

Optical and atomic decoherence in quantum nondemolition measurement induced atomic ensemble entanglement 量子非拆除测量中的光学和原子退相干诱导原子系综纠缠

AVS quantum science Pub Date : 2023-09-01 DOI: 10.1116/5.0147830

Shuai Gao, Shuang Li, Manish Chaudhary, Matthew Prest, Ebubechukwu O. Ilo-Okeke, Valentin Ivannikov, Tim Byrnes

引用次数: 0

A gauge field theory of coherent matter waves 相干物质波的规范场理论

AVS quantum science Pub Date : 2023-09-01 DOI: 10.1116/5.0159672

Dana Z. Anderson, Katarzyna Krzyzanowska

引用次数: 0