Quantum Science and Technology最新文献

Robust Mølmer-Sørensen gate against symmetric and asymmetric errors

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-24 DOI: 10.1088/2058-9565/adce29

Wenhao Zhang, Gaoxiang Tang, Kecheng Liu, Xiao Yuan, Yangchao Shen, Yukai Wu and Xiao-Ming Zhang

引用次数: 0

Truncation-free quantum simulation of pure-gauge compact QED using Josephson arrays

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-24 DOI: 10.1088/2058-9565/adce2a

Guy Pardo, Julian Bender, Nadav Katz and Erez Zohar

引用次数: 0

Qibosoq: an open-source framework for quantum circuit RFSoC programming

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-24 DOI: 10.1088/2058-9565/adcd97

Rodolfo Carobene, Alessandro Candido, Javier Serrano, Alvaro Orgaz-Fuertes, Andrea Giachero and Stefano Carrazza

引用次数: 0

Sensing multiatom networks in cavities via photon-induced excitation resonance

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-23 DOI: 10.1088/2058-9565/adcae3

Pritam Chattopadhyay, Avijit Misra, Saikat Sur, David Petrosyan, Gershon Kurizki

引用次数: 0

Optical nonreciprocity induced by quantum squeezing in temperature sensitive optomechanical systems

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-23 DOI: 10.1088/2058-9565/adcbcf

Jun-Cong Zheng, Xiao-Wei Zheng, Xin-Lei Hei, Yi-Fan Qiao, Xiao-Yu Yao, Xue-Feng Pan, Yu-Meng Ren, Xiao-Wen Huo, Peng-Bo Li

{"title":"Optical nonreciprocity induced by quantum squeezing in temperature sensitive optomechanical systems","authors":"Jun-Cong Zheng, Xiao-Wei Zheng, Xin-Lei Hei, Yi-Fan Qiao, Xiao-Yu Yao, Xue-Feng Pan, Yu-Meng Ren, Xiao-Wen Huo, Peng-Bo Li","doi":"10.1088/2058-9565/adcbcf","DOIUrl":"https://doi.org/10.1088/2058-9565/adcbcf","url":null,"abstract":"We investigate single-photon transmission and the statistical properties of photon correlations in <inline-formula>\u0000<tex-math><?CDATA $chi^{(2)}$?></tex-math><mml:math overflow=\"scroll\"><mml:mrow><mml:msup><mml:mi>χ</mml:mi><mml:mrow><mml:mo stretchy=\"false\">(</mml:mo><mml:mn>2</mml:mn><mml:mo stretchy=\"false\">)</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math><inline-graphic xlink:href=\"qstadcbcfieqn1.gif\"></inline-graphic></inline-formula> microring optomechanical systems, where optical nonreciprocity is induced by directional quantum squeezing. Due to the presence of thermal phonons in the mechanical resonator, the system is highly sensitive to temperature changes. Our numerical simulations show that as the thermal phonons vary from 0 to 10, the isolation ratio of single-photon transmission decreases from 22.2 dB to 1.1 dB (or from −23 dB to −3.3 dB). Additionally, the statistical properties of photon correlations transition from exhibiting a strong bunching effect to a weak bunching effect. Moreover, the parametric amplification component enhances the device’s temperature response, distinguishing it from other similar nonreciprocal devices. Our protocol suggests a potential application for nonreciprocal setups in precise temperature measurement at ultralow temperatures, thereby enriching quantum networks and quantum information processing.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"7 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Spatially parallel decoding for multi-qubit lattice surgery

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-23 DOI: 10.1088/2058-9565/adc6b6

Sophia Fuhui Lin, Eric C Peterson, Krishanu Sankar, Prasahnt Sivarajah

{"title":"Spatially parallel decoding for multi-qubit lattice surgery","authors":"Sophia Fuhui Lin, Eric C Peterson, Krishanu Sankar, Prasahnt Sivarajah","doi":"10.1088/2058-9565/adc6b6","DOIUrl":"https://doi.org/10.1088/2058-9565/adc6b6","url":null,"abstract":"Running quantum algorithms protected by quantum error correction requires a real time, classical decoder. To prevent the accumulation of a backlog, this decoder must process syndromes from the quantum device at a faster rate than they are generated. Most prior work on real time decoding has focused on an isolated logical qubit encoded in the surface code. However, for surface code, quantum programs of utility will require multi-qubit interactions performed via lattice surgery. A large merged patch can arise during lattice surgery—possibly as large as the entire device. This puts a significant strain on a real time decoder, which must decode errors on this merged patch and maintain the level of fault-tolerance that it achieves on isolated logical qubits. These requirements are relaxed by using spatially parallel decoding, which can be accomplished by dividing the physical qubits on the device into multiple overlapping groups and assigning a decoder module to each. We refer to this approach as <italic toggle=\"yes\">spatially parallel windows</italic>. While previous work has explored similar ideas, none have addressed system-specific considerations pertinent to the task or the constraints from using hardware accelerators. In this work, we demonstrate how to configure spatially parallel windows, so that the scheme (1) is compatible with hardware accelerators, (2) supports general lattice surgery operations, (3) maintains the fidelity of the logical qubits, and (4) meets the throughput requirement for real time decoding. Furthermore, our results reveal the importance of optimally choosing the buffer width to achieve a balance between accuracy and throughput—a decision that should be influenced by the device’s physical noise.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"13 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Gate teleportation-assisted routing for quantum algorithms 量子算法的门远传辅助路由选择

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-21 DOI: 10.1088/2058-9565/adcae4

Aravind Plathanam Babu, Oskari Kerppo, Andrés Muñoz-Moller, Majid Haghparast and Matti Silveri

{"title":"Gate teleportation-assisted routing for quantum algorithms","authors":"Aravind Plathanam Babu, Oskari Kerppo, Andrés Muñoz-Moller, Majid Haghparast and Matti Silveri","doi":"10.1088/2058-9565/adcae4","DOIUrl":"https://doi.org/10.1088/2058-9565/adcae4","url":null,"abstract":"The limited qubit connectivity of quantum processors poses a significant challenge in deploying practical algorithms and logical gates, necessitating efficient qubit mapping and routing strategies. When implementing a gate that requires additional connectivity beyond the native connectivity, the qubit state must be moved to a nearby connected qubit to execute the desired gate locally. This is typically achieved using a series of SWAP gates creating a SWAP path. However, routing methods relying on SWAP gates often lead to increased circuit depth and gate count, motivating the need for alternative approaches. This work explores the potential of teleported gates to improve qubit routing efficiency, focusing on implementation within specific hardware topologies and benchmark quantum algorithms. We propose a routing method that is assisted by gate teleportation. It establishes additional connectivity using gate teleportation paths through available unused qubits, termed auxiliary qubits, within the topology. To optimize this approach, we have developed an algorithm to identify the best gate teleportation connections, considering their potential to reduce the depth of the circuit and address possible errors that may arise from the teleportation paths. Finally, we demonstrate depth reduction with gate teleportation-assisted routing in various benchmark algorithms, including case studies on the compilation of the Deutsch–Jozsa algorithm and the quantum approximation optimization algorithm for heavy-hexagon topology used in IBM 127-qubit Eagle r3 processors. Our benchmark results show a 10%–25% depth reduction in the routing of selected algorithms compared to regular routing without using teleported gates.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"7 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Loss-tolerant quantum key distribution with detection efficiency mismatch

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-21 DOI: 10.1088/2058-9565/adc8cc

Alessandro Marcomini, Akihiro Mizutani, Fadri Grünenfelder, Marcos Curty and Kiyoshi Tamaki

{"title":"Loss-tolerant quantum key distribution with detection efficiency mismatch","authors":"Alessandro Marcomini, Akihiro Mizutani, Fadri Grünenfelder, Marcos Curty and Kiyoshi Tamaki","doi":"10.1088/2058-9565/adc8cc","DOIUrl":"https://doi.org/10.1088/2058-9565/adc8cc","url":null,"abstract":"Current implementations of quantum key distribution (QKD) typically rely on prepare-and-measure (P&M) schemes. Unfortunately, these implementations are not completely secure, unless security proofs fully incorporate all imperfections of real devices. So far, existing proofs have primarily focused on imperfections of either the light source or the measurement device. In this paper, we establish a security proof for the loss-tolerant P&M QKD protocol that incorporates imperfections in both the source and the detectors. Specifically, we demonstrate the security of this scheme when the emitted states deviate from the ideal ones and Bob’s measurement device does not meet the basis-independent detection efficiency condition. Furthermore, we conduct an experiment to characterise the detection efficiency mismatch of commercial single-photon detectors as a function of the polarisation state of the input light, and determine the expected secret key rate in the presence of state preparation flaws when using such detectors. Our work provides a way towards guaranteeing the security of actual implementations of widely deployed P&M QKD.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"17 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Boosting quantum annealing performance through direct polynomial unconstrained binary optimization 通过直接多项式无约束二元优化提升量子退火性能

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-21 DOI: 10.1088/2058-9565/adcae6

Sebastian Nagies, Kevin T Geier, Javed Akram, Dimitrios Bantounas, Michael Johanning and Philipp Hauke

{"title":"Boosting quantum annealing performance through direct polynomial unconstrained binary optimization","authors":"Sebastian Nagies, Kevin T Geier, Javed Akram, Dimitrios Bantounas, Michael Johanning and Philipp Hauke","doi":"10.1088/2058-9565/adcae6","DOIUrl":"https://doi.org/10.1088/2058-9565/adcae6","url":null,"abstract":"Quantum annealing aims at solving optimization problems of practical relevance using quantum-computing hardware. Problems of interest are typically formulated in terms of quadratic unconstrained binary optimization (QUBO) Hamiltonians. However, many optimization problems are much more naturally formulated in terms of polynomial unconstrained binary optimization (PUBO) functions of higher order. As we show with various problem examples, leveraging the PUBO formulation can bring considerable savings in terms of required number of qubits. Moreover, in numerical benchmarks for the paradigmatic 3-SAT problem, we find scenarios where the scaling of the minimum energy gap during the optimization sweep differs significantly, suggesting the possibility of an exponentially faster annealing time when using the PUBO as compared to the QUBO formulation. This advantage persists even when considering the overhead caused by the higher-order interactions necessary for PUBO cost Hamiltonians. As an interesting side effect, the analysis on minimum energy gaps of different 3-SAT instance generators reveals different degrees of hardness, which will be of interest also for classical benchmark calculations. Our findings show a promising path to improving the resource efficiency and sweeping speed of quantum annealing protocols on both analog and digital platforms, which are important prerequisites when aiming at solving larger optimization problems with relevance to industry.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"23 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Linear-optical protocols for mitigating and suppressing noise in bosonic systems 减轻和抑制玻色子系统噪声的线性光学协议

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2025-04-21 DOI: 10.1088/2058-9565/adc82c

Y S Teo, S U Shringarpure, S Cho and H Jeong

{"title":"Linear-optical protocols for mitigating and suppressing noise in bosonic systems","authors":"Y S Teo, S U Shringarpure, S Cho and H Jeong","doi":"10.1088/2058-9565/adc82c","DOIUrl":"https://doi.org/10.1088/2058-9565/adc82c","url":null,"abstract":"Quantum-information processing and computation with bosonic qubits are corruptible by noise channels. Using interferometers and photon-subtraction gadgets (PSGs) accompanied by linear amplification and attenuation, we establish linear-optical methods to mitigate and suppress bosonic noise channels. We first show that by employing amplifying and attenuating PSGs respectively at the input and output of either a thermal or random-displacement channel, probabilistic error cancellation (PEC) can be carried out to mitigate errors in expectation-value estimation. We also derive optimal physical estimators that are properly constrained to improve the sampling accuracy of PEC. Next, we prove that a purely-dephasing channel is coherently suppressible using a multimode Mach–Zehnder interferometer and conditional vacuum measurements (vacuum-based Mach–Zehnder scheme or the VMZ scheme). In the limit of infinitely-many ancillas, with nonvanishing success rates, VMZ using either Hadamard or two-design interferometers turns any dephasing channel into a phase-space-rotated linear-attenuation channel that can subsequently be inverted with (rotated) linear amplification without Kerr nonlinearity. Moreover, for weak central-Gaussian dephasing, the suppression fidelity increases monotonically with the number of ancillas and most optimally with Hadamard interferometers. We demonstrate the performance of these linear-optical mitigation and suppression schemes on common noise channels (and their compositions) and popular bosonic codes. While the theoretical formalism pertains to idling noise channels, we also provide numerical evidence supporting mitigation and suppression capabilities with respect to noise from universal gate operations.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"64 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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