npj Quantum Information最新文献

Programmable high-dimensional state synthesis through a 20-m multimode fiber via long-coherence atomic photons 利用长相干原子光子通过20米多模光纤合成可编程高维态

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-18 DOI: 10.1038/s41534-026-01398-6

Changhoon Baek,Danbi Kim,Juntaek Oh,Minsu Kim,Seokchan Yoon,Wonshik Choi,Han Seb Moon

引用次数: 0

Genuine continuous quantumness 真正的连续量子

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-14 DOI: 10.1038/s41534-026-01389-7

Vojtěch Kala, Jiří Fadrný, Michal Neset, Jan Bílek, Petr Marek, Miroslav Ježek

{"title":"Genuine continuous quantumness","authors":"Vojtěch Kala, Jiří Fadrný, Michal Neset, Jan Bílek, Petr Marek, Miroslav Ježek","doi":"10.1038/s41534-026-01389-7","DOIUrl":"https://doi.org/10.1038/s41534-026-01389-7","url":null,"abstract":"Randomness is a key feature of quantum physics. Heisenberg’s uncertainty principle reveals the existence of an intrinsic noise, usually explored through Gaussian squeezed states. Due to their insufficiency for quantum advantage, the focus is currently shifting towards genuinely quantum non-Gaussian states. However, while genuine quantum behavior comes naturally to discrete variable systems, its preparation and verification are difficult in continuous ones. Simultaneously, a unifying theoretical framework based on the continuous nature is missing. Here, we introduce nonlinear squeezing as a general framework to describe and verify genuine quantumness in the noise of continuous quantum states. Using this approach, we certify the non-Gaussianity of experimentally prepared multi-photon-added coherent states of light for the first time. Chiefly, we demonstrated the nonlinear squeezing corresponding to third- and fifth-order quantum nonlinearities, going significantly beyond the current state-of-the-art in quantum technology. This framework enables uncovering intricate quantum properties in cutting-edge experiments and provides an efficient tool for further development of quantum technologies.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"6 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149218133","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

Structural control of two-level defect density revealed by high-throughput correlative measurements of Josephson junctions 约瑟夫逊结高通量相关测量揭示的二能级缺陷密度的结构控制

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-14 DOI: 10.1038/s41534-026-01395-9

Oliver F. Wolff,Harshvardhan Mantry,Rahim Raja,Wei-Hsiang Peng,Kaushik Singirikonda,Seungkyun Lee,Shishir Sudhaman,Rafael Gonçalves,Pinshane Y. Huang,Angela Kou,Wolfgang Pfaff

引用次数: 0

Mirror subspace diagonalization: a real-time quantum Krylov algorithm with near-optimal sampling cost 镜像子空间对角化：具有近最优采样成本的实时量子Krylov算法

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-13 DOI: 10.1038/s41534-026-01384-y

Shota Kanasugi,Yuya O. Nakagawa,Norifumi Matsumoto,Yuichiro Hidaka,Kazunori Maruyama,Hirotaka Oshima

引用次数: 0

Exponential advantage in continuous-variable quantum state learning 连续变量量子态学习中的指数优势

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-12 DOI: 10.1038/s41534-026-01391-z

Eugen Coroi,Changhun Oh

引用次数: 0

A quantitative model for embedding quantum-secure communications and evaluating communication autonomy in industrial control systems 工业控制系统中嵌入量子安全通信和评估通信自主性的定量模型

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-12 DOI: 10.1038/s41534-026-01396-8

Konstantinos Gkouliaras,Vasileios Theos,True Miller,Brian Jowers,George Kennedy,Andy Grant,Terry Cronin,Philip G. Evans,Stylianos Chatzidakis

引用次数: 0

Demonstration of subspace-search variational quantum eigensolver using photonic orbital angular momentum qudits 子空间搜索变分量子本征解的光子轨道角动量量子论证

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-07 DOI: 10.1038/s41534-026-01380-2

Kang-Min Hu,Myung-Hyun Sohn,Yong-Su Kim,Kwang Jo Lee,Hyun Woo Kim,Hyang-Tag Lim

引用次数: 0

High-order Magnus expansion for Hamiltonian simulation 哈密顿模拟的高阶Magnus展开

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-07 DOI: 10.1038/s41534-026-01385-x

Di Fang,Diyi Liu,Shuchen Zhu

引用次数: 0

Breaking Rayleigh’s curse: broadband frequency super-resolution via a quantum harmonic oscillator 打破瑞利诅咒：通过量子谐振子实现宽带频率超分辨率

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-06 DOI: 10.1038/s41534-026-01388-8

Hao Wu, Grant D. Mitts, Clayton Z. C. Ho, Joshua A. Rabinowitz, Eric R. Hudson

{"title":"Breaking Rayleigh’s curse: broadband frequency super-resolution via a quantum harmonic oscillator","authors":"Hao Wu, Grant D. Mitts, Clayton Z. C. Ho, Joshua A. Rabinowitz, Eric R. Hudson","doi":"10.1038/s41534-026-01388-8","DOIUrl":"https://doi.org/10.1038/s41534-026-01388-8","url":null,"abstract":"Non-orthogonal quantum states cannot be distinguished with complete certainty, making their underlying physical parameters difficult to resolve. In frequency spectroscopy of two closely spaced electromagnetic fields, this challenge has traditionally been associated with the Fourier-transform-limited linewidth, implying that the measurement time required to resolve a frequency difference Δω diverges as Δω → 0. Here, we show that this linewidth does not fundamentally limit the resolution of two closely spaced frequencies when each signal has sufficient amplitude for efficient detection. We propose and experimentally demonstrate a broadband quantum harmonic oscillator protocol for super-resolution spectroscopy in the radio-frequency and microwave domains. A Quantum Fluctuation Suppression (QFS) sequence encodes Δω into the oscillator state while suppressing parameter-independent shot noise. We resolve two randomly chosen electric fields near 100 MHz separated by 5 Hz, measuring 5.0(1.6) Hz with a 1ms probe time, 200 × beyond the conventional spectral-resolution limit. The method reduces acquisition time by more than five orders of magnitude and, through the motional Raman framework, is applicable across a broad frequency range.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"13 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149087822","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

The equivalence of quantum deletion and insertion errors on permutation-invariant codes 置换不变码上量子删除和插入错误的等价性

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-10-03 DOI: 10.1038/s41534-026-01371-3

Lewis Bulled, Yingkai Ouyang

引用次数: 0