npj Quantum Information最新文献_第7页

The role of data-induced randomness in quantum machine learning classification tasks 数据诱导随机性在量子机器学习分类任务中的作用

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-28 DOI: 10.1038/s41534-026-01330-y

Berta Casas, Xavier Bonet-Monroig, Adrián Pérez-Salinas

引用次数: 0

A unified optical platform for non-Gaussian and fault-tolerant Gottesman-Kitaev-Preskill states 非高斯和容错Gottesman-Kitaev-Preskill态的统一光学平台

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-28 DOI: 10.1038/s41534-026-01336-6

Özlem Erkılıç, Aritra Das, Biveen Shajilal, Ping Koy Lam, Timothy C. Ralph, Syed M. Assad

{"title":"A unified optical platform for non-Gaussian and fault-tolerant Gottesman-Kitaev-Preskill states","authors":"Özlem Erkılıç, Aritra Das, Biveen Shajilal, Ping Koy Lam, Timothy C. Ralph, Syed M. Assad","doi":"10.1038/s41534-026-01336-6","DOIUrl":"https://doi.org/10.1038/s41534-026-01336-6","url":null,"abstract":"Quantum technologies, encompassing communication, computation, and metrology, rely on the generation and control of non-Gaussian states of light. These states enable secure quantum communication, fault-tolerant quantum computation, and precision sensing beyond classical limits, yet their practical realisation remains a major challenge due to reliance on high-photon-number Fock states or strong non-linearities. Here we introduce a unified optical framework that removes this constraint, using only Gaussian inputs, optical parametric amplification, and heralded photon detection. Within a single architecture, we demonstrate the generation of photon-added squeezed states with near unit fidelity, cubic-phase-like states with strong non-linearities and fidelities above 98.5%, and squeezed-cat states exceeding 99% fidelity that can be iteratively bred into GKP grid states surpassing the 9.75 dB fault-tolerance threshold. Operating entirely below 3 dB of input squeezing, the approach provides a scalable, experimentally accessible platform that unites the state resources required for quantum communication, metrology, and computation within one coherent optical framework.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"19 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148612780","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

Experimental implementation of a discrete-time quantum walk on biological networks 生物网络上离散时间量子行走的实验实现

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-24 DOI: 10.1038/s41534-026-01332-w

Viacheslav Dubovitskii, Filippo Utro, Aritra Bose, Laxmi Parida, Sabrina Maniscalco, Sergey N. Filippov

{"title":"Experimental implementation of a discrete-time quantum walk on biological networks","authors":"Viacheslav Dubovitskii, Filippo Utro, Aritra Bose, Laxmi Parida, Sabrina Maniscalco, Sergey N. Filippov","doi":"10.1038/s41534-026-01332-w","DOIUrl":"https://doi.org/10.1038/s41534-026-01332-w","url":null,"abstract":"Quantum walks provide a versatile framework for probing the structural and dynamical properties of complex systems ranging from biological networks to synthetic materials. However, their realization on current noisy pre-fault-tolerant quantum computers is fundamentally limited by decoherence. Conventional dense encodings of graph structures require prohibitively deep circuits, making them incompatible with existing hardware. Here we introduce an algorithm that leverages symmetry-sector encoding and trades circuit depth for the number of qubits, while integrating symmetry-respecting postselection as an effective noise-mitigation strategy. This combination enables us to execute practical quantum-walk circuits for biological network motifs on actual quantum hardware. We benchmark the proposed methodology against known state-of-the-art circuit architectures, highlighting significant reduction of circuit depth in our approach at the cost of moderate qubit overhead. Utilizing 40 qubits, we implement quantum walks on complex graphs containing up to 17 nodes and 20 edges—the largest experiment on superconducting hardware to date, with the Hellinger fidelity exceeding 87% throughout 7 steps. We present a proof-of-principle case study that illustrates how experimentally obtained quantum-walk dynamics on a protein-protein-interaction network can be applied to prioritizing disease-associated genes. We discuss the framework scalability in the pre-fault-tolerant era and its potential for studying larger biological networks.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"8 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148587306","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

A hybrid Anyon-otto thermal machine 一个混合的任何奥托热机

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-24 DOI: 10.1038/s41534-026-01328-6

Mohit Lal Bera, Joyce Kwan, Armando Pérez, Miguel A. García-March, Ravindra Chhajlany, Tobias Grass, Maciej Lewenstein, Utso Bhattacharya, Sourav Bhattacharjee

引用次数: 0

Thermodynamic sampling of materials using neutral-atom quantum computers 使用中性原子量子计算机对材料进行热力学采样

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-21 DOI: 10.1038/s41534-026-01323-x

Bruno Camino, Mao Lin, John Buckeridge, Scott M. Woodley

{"title":"Thermodynamic sampling of materials using neutral-atom quantum computers","authors":"Bruno Camino, Mao Lin, John Buckeridge, Scott M. Woodley","doi":"10.1038/s41534-026-01323-x","DOIUrl":"https://doi.org/10.1038/s41534-026-01323-x","url":null,"abstract":"Neutral-atom quantum hardware has emerged as a promising platform for programmable many-body physics. In this work, we develop and validate a practical framework for extracting thermodynamic properties of materials using such hardware. As a test case, we consider nitrogen-doped graphene. Starting from Density Functional Theory (DFT) formation energies, we map the material energetics onto a Rydberg-atom Hamiltonian suitable for quantum annealing by fitting an on-site term and distance-dependent pair interactions. The Hamiltonian derived from DFT cannot be implemented directly on current QuEra devices, as the largest energy scale accessible on the hardware is two orders of magnitude smaller than the target two-body interaction in the material. To overcome this limitation, we introduce a rescaling strategy based on a single parameter, αv, which ensures that the distribution sampled by the hardware is well described by Boltzmann-like weights corresponding to those of the material at an effective temperature ({T}^{{prime} }={alpha }_{v}T), where T is the device sampling temperature. This rescaling also establishes a direct correspondence between the global laser detuning Δg and the grand-canonical chemical potential Δμ. We validate the method on a 28-site graphene nanoflake using exhaustive enumeration, and on a larger 78-site system where Monte Carlo sampling confirms preferential sampling of low-energy configurations.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"34 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148587303","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

Photonic qubit gates via 1D scattering from an array of two-level emitters 光子量子比特门通过一维散射从阵列的两能级发射

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-17 DOI: 10.1038/s41534-026-01324-w

Evangelos Varvelis, Joachim Ankerhold

引用次数: 0

Generating logical magic states with the aid of non-Abelian topological order 利用非阿贝尔拓扑顺序生成逻辑魔态

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-16 DOI: 10.1038/s41534-026-01315-x

Sheng-Jie Huang, Yanzhu Chen

引用次数: 0

Self-dual bivariate bicycle codes with transversal Clifford gates 具有横向Clifford门的自对偶二元自行车码

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-15 DOI: 10.1038/s41534-026-01303-1

Zijian Liang, Yu-An Chen

引用次数: 0

Variational Gibbs state preparation on trapped-ion devices 捕获离子器件的变分吉布斯态制备

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-11 DOI: 10.1038/s41534-026-01318-8

Reece Robertson, Mirko Consiglio, Josey Stevens, Emery Doucet, Tony J. G. Apollaro, Sebastian Deffner

引用次数: 0

Erbium-doped fiber quantum memory for chip-integrated quantum-dot single photons at 980 nm 980 nm芯片集成量子点单光子掺铒光纤量子存储器

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2026-07-11 DOI: 10.1038/s41534-026-01316-w

Nasser Gohari Kamel, Arsalan Mansourzadeh, Ujjwal Gautam, Vinaya Kumar Kavatamane, Ashutosh Singh, Edith Yeung, David B. Northeast, Paul E. Barclay, Philip J. Poole, Dan Dalacu, Daniel Oblak

引用次数: 0