npj Quantum Information最新文献_第2页

Optical and spin coherence of Er spin qubits in epitaxial cerium dioxide on silicon 硅基外延二氧化铈中 Er 自旋量子比特的光学和自旋相干性

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-20 DOI: 10.1038/s41534-024-00903-z

Jiefei Zhang, Gregory D. Grant, Ignas Masiulionis, Michael T. Solomon, Jonathan C. Marcks, Jasleen K. Bindra, Jens Niklas, Alan M. Dibos, Oleg G. Poluektov, F. Joseph Heremans, Supratik Guha, David D. Awschalom

{"title":"Optical and spin coherence of Er spin qubits in epitaxial cerium dioxide on silicon","authors":"Jiefei Zhang, Gregory D. Grant, Ignas Masiulionis, Michael T. Solomon, Jonathan C. Marcks, Jasleen K. Bindra, Jens Niklas, Alan M. Dibos, Oleg G. Poluektov, F. Joseph Heremans, Supratik Guha, David D. Awschalom","doi":"10.1038/s41534-024-00903-z","DOIUrl":"https://doi.org/10.1038/s41534-024-00903-z","url":null,"abstract":"Robust spin-photon interfaces with optical transitions in the telecommunication band are essential for quantum networking technologies. Erbium (Er) ions are the ideal candidate with environmentally protected transitions in telecom-C band. Finding the right technologically compatible host material to enable long-lived spins remains a major hurdle. We introduce a new platform based on Er ions in cerium dioxide (CeO2) as a nearly-zero nuclear spin environment (0.04%) epitaxially grown on silicon, offering silicon compatibility for opto-electrical devices. Our studies focus on Er3+ ions and show a narrow homogeneous linewidth of 440 kHz with an optical coherence time of 0.72 μs at 3.6 K. The reduced nuclear spin noise enables a slow spin-lattice relaxation with a spin relaxation time up to 2.5 ms and an electron spin coherence time of 0.66 μs (in the isolated ion limit) at 3.6 K. These findings highlight the potential of Er3+:CeO2 platform for quantum networks applications.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"11 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

End-to-end variational quantum sensing 端到端变异量子传感

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-19 DOI: 10.1038/s41534-024-00914-w

Benjamin MacLellan, Piotr Roztocki, Stefanie Czischek, Roger G. Melko

引用次数: 0

Guarantees on the structure of experimental quantum networks 实验量子网络结构的保证

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-14 DOI: 10.1038/s41534-024-00911-z

Andrés Ulibarrena, Jonathan W. Webb, Alexander Pickston, Joseph Ho, Alessandro Fedrizzi, Alejandro Pozas-Kerstjens

引用次数: 0

Trainability barriers and opportunities in quantum generative modeling 量子生成模型的可训练性障碍与机遇

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-13 DOI: 10.1038/s41534-024-00902-0

Manuel S. Rudolph, Sacha Lerch, Supanut Thanasilp, Oriel Kiss, Oxana Shaya, Sofia Vallecorsa, Michele Grossi, Zoë Holmes

引用次数: 0

Interferometry of quantum correlation functions to access quasiprobability distribution of work 量子相关函数干涉测量法获取工作的准概率分布

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-11 DOI: 10.1038/s41534-024-00913-x

Santiago Hernández-Gómez, Takuya Isogawa, Alessio Belenchia, Amikam Levy, Nicole Fabbri, Stefano Gherardini, Paola Cappellaro

{"title":"Interferometry of quantum correlation functions to access quasiprobability distribution of work","authors":"Santiago Hernández-Gómez, Takuya Isogawa, Alessio Belenchia, Amikam Levy, Nicole Fabbri, Stefano Gherardini, Paola Cappellaro","doi":"10.1038/s41534-024-00913-x","DOIUrl":"https://doi.org/10.1038/s41534-024-00913-x","url":null,"abstract":"The Kirkwood-Dirac quasiprobability distribution, intimately connected with the quantum correlation function of two observables measured at distinct times, is becoming increasingly relevant for fundamental physics and quantum technologies. This quasiprobability distribution can take non-positive values, and its experimental reconstruction becomes challenging when expectation values of incompatible observables are involved. Here, we use an interferometric scheme aided by an auxiliary system to reconstruct the Kirkwood-Dirac quasiprobability distribution. We experimentally demonstrate this scheme in an electron-nuclear spin system associated with a nitrogen-vacancy center in diamond. By measuring the characteristic function, we reconstruct the quasiprobability distribution of work and analyze the behavior of its first and second moments. Our results clarify the physical meaning of the work quasiprobability distribution in the context of quantum thermodynamics. Finally, we study the uncertainty of measuring the Hamiltonian of the system at two times, via the Robertson-Schrödinger uncertainty relation, for different initial states.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"71 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Lightcone bounds for quantum circuit mapping via uncomplexity 通过非复杂性实现量子电路映射的光锥边界

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-09 DOI: 10.1038/s41534-024-00909-7

Matthew Steinberg, Medina Bandić, Sacha Szkudlarek, Carmen G. Almudever, Aritra Sarkar, Sebastian Feld

引用次数: 0

Unified linear response theory of quantum electronic circuits 量子电子电路的统一线性响应理论

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-09 DOI: 10.1038/s41534-024-00907-9

L. Peri, M. Benito, C. J. B. Ford, M. F. Gonzalez-Zalba

{"title":"Unified linear response theory of quantum electronic circuits","authors":"L. Peri, M. Benito, C. J. B. Ford, M. F. Gonzalez-Zalba","doi":"10.1038/s41534-024-00907-9","DOIUrl":"https://doi.org/10.1038/s41534-024-00907-9","url":null,"abstract":"Modeling the electrical response of multi-level quantum systems at finite frequency has been typically performed in the context of two incomplete paradigms: (i) input-output theory, which is valid at any frequency but neglects dynamic losses, and (ii) semiclassical theory, which captures dynamic dissipation effects well but is only accurate at low frequencies. Here, we develop a unifying theory, valid for arbitrary frequencies, that captures both the small-signal quantum behavior and the non-unitary effects introduced by relaxation and dephasing. The theory allows a multi-level system to be described by a universal small-signal equivalent-circuit model, a resonant RLC circuit, whose topology only depends on the number of energy levels. We apply our model to a double-quantum-dot charge qubit and a Majorana qubit, showing the capability to continuously describe the systems from adiabatic to resonant and from coherent to incoherent, suggesting new and realistic experiments for improved quantum state readout. Our model will facilitate the design of hybrid quantum–classical circuits and the simulation of qubit control and quantum state readout.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"95 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142597171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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-assisted resonance fluorescence from a nitrogen-vacancy center in diamond 金刚石中氮空位中心的空穴辅助共振荧光

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-07 DOI: 10.1038/s41534-024-00915-9

Viktoria Yurgens, Yannik Fontana, Andrea Corazza, Brendan J. Shields, Patrick Maletinsky, Richard J. Warburton

{"title":"Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond","authors":"Viktoria Yurgens, Yannik Fontana, Andrea Corazza, Brendan J. Shields, Patrick Maletinsky, Richard J. Warburton","doi":"10.1038/s41534-024-00915-9","DOIUrl":"https://doi.org/10.1038/s41534-024-00915-9","url":null,"abstract":"The nitrogen-vacancy center in diamond is an attractive resource for the generation of remote entangled states owing to its optically addressable and long-lived electronic spin. However, its low native fraction of coherent photon emission, ~3%, undermines the achievable spin-photon entanglement rates. Here, we couple a nitrogen-vacancy center with a narrow extrinsically-broadened linewidth (159 MHz), hosted in a micron-thin membrane, to an open microcavity. The resulting Purcell factor of ~1.8 increases the zero-phonon line fraction to over 44%. Operation in the Purcell regime, together with an efficient collection of the zero-phonon-line photons, allows resonance fluorescence to be detected for the first time without any temporal filtering. We achieve a >10 signal-to-laser background ratio. This selective enhancement of the center’s zero-phonon transitions could increase spin-spin entanglement success probabilities beyond an order of magnitude compared to state-of-the-art implementations, and enable powerful quantum optics techniques such as wave-packet shaping or all-optical spin manipulation.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"1 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142597174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Finding the optimal probe state for multiparameter quantum metrology using conic programming 利用圆锥编程寻找多参数量子计量学的最佳探测状态

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-07 DOI: 10.1038/s41534-024-00905-x

Masahito Hayashi, Yingkai Ouyang

引用次数: 0

Scaling whole-chip QAOA for higher-order ising spin glass models on heavy-hex graphs 在重六边形图上扩展高阶等阶自旋玻璃模型的全芯片 QAOA

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-11-06 DOI: 10.1038/s41534-024-00906-w

Elijah Pelofske, Andreas Bärtschi, Lukasz Cincio, John Golden, Stephan Eidenbenz

引用次数: 0