EPJ Quantum Technology最新文献_第6页

Coulomb effect in hybrid double quantum dot-metal nanoparticle systems considering the wetting layer 考虑到润湿层的双量子点-金属纳米粒子混合系统中的库仑效应

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-26 DOI: 10.1140/epjqt/s40507-024-00233-1

Nour A. Nasser, Amin H. Al-Khursan

{"title":"Coulomb effect in hybrid double quantum dot-metal nanoparticle systems considering the wetting layer","authors":"Nour A. Nasser, Amin H. Al-Khursan","doi":"10.1140/epjqt/s40507-024-00233-1","DOIUrl":"10.1140/epjqt/s40507-024-00233-1","url":null,"abstract":"<div><p>Many body effects in the wetting layer (WL)-double quantum dot (DQD)-metal nanoparticle (MNP) structure have been studied by modeling the Coulomb scattering rates in this structure. The strong coupling between WL-DQD-MNPs was considered. An orthogonalized plane wave (OPW) is assumed between WL-QD transitions. The transition momenta are calculated accordingly to specify the normalized Rabi frequency on this structure, considering the strong coupling between the WL-DQD-MNP structures. This approach is important for realizing scattering rates, including in-and-out capture and relaxation rates, which are essential for specifying the type of structure used depending on the optimum value of the scattering time required to fit the application. The QD hole capture rate is the highest, and the hole capture times are the shortest. The relaxation times are less than the electron capture times by one order, while they are half of the hole capture times. The capture rates increase with increasing distance <i>R</i> between the DQDs and the MNP. High tunneling increases hole-capture rates and changes the relaxation rates, showing the importance of tunneling in controlling the scattering rates.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-024-00233-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140297158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum gate sets for lattice QCD in the strong-coupling limit: (N_{f}=1) 强耦合极限下格子 QCD 的量子门集：(N_{f}=1)

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-25 DOI: 10.1140/epjqt/s40507-024-00236-y

Michael Fromm, Owe Philipsen, Wolfgang Unger, Christopher Winterowd

引用次数: 0

Cryptanalysis and improvement of efficient multiparty quantum secret sharing based on a novel structure and single qubits 基于新型结构和单量子比特的高效多方量子秘密共享的密码分析与改进

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-25 DOI: 10.1140/epjqt/s40507-024-00235-z

Gan Gao

引用次数: 0

Local oscillator port integrated resonator for Rydberg atom-based electric field measurement enhancement 用于增强基于雷德贝格原子的电场测量的局域振荡器端口集成谐振器

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-22 DOI: 10.1140/epjqt/s40507-024-00231-3

Bo Wu, Dunwei Liao, Zhenke Ding, Kai Yang, Yi Liu, Di Sang, Qiang An, Yunqi Fu

引用次数: 0

Precise certification of a qubit space 量子比特空间的精确认证

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-19 DOI: 10.1140/epjqt/s40507-024-00230-4

Tomasz Białecki, Tomasz Rybotycki, Josep Batle, Jakub Tworzydło, Adam Bednorz

引用次数: 0

Simulating (Z_{2}) lattice gauge theory with the variational quantum thermalizer 用可变量子热化器模拟（Z_{2}）晶格规理论

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-15 DOI: 10.1140/epjqt/s40507-024-00232-2

Michael Fromm, Owe Philipsen, Michael Spannowsky, Christopher Winterowd

引用次数: 0

Coherent interface between optical and microwave photons on an integrated superconducting atom chip 集成超导原子芯片上的光子与微波光子相干界面

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-13 DOI: 10.1140/epjqt/s40507-024-00229-x

David Petrosyan, József Fortágh, Gershon Kurizki

引用次数: 0

On the optimality of quantum circuit initial mapping using reinforcement learning 利用强化学习论量子电路初始映射的最优性

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-13 DOI: 10.1140/epjqt/s40507-024-00225-1

Norhan Elsayed Amer, Walid Gomaa, Keiji Kimura, Kazunori Ueda, Ahmed El-Mahdy

{"title":"On the optimality of quantum circuit initial mapping using reinforcement learning","authors":"Norhan Elsayed Amer, Walid Gomaa, Keiji Kimura, Kazunori Ueda, Ahmed El-Mahdy","doi":"10.1140/epjqt/s40507-024-00225-1","DOIUrl":"10.1140/epjqt/s40507-024-00225-1","url":null,"abstract":"<div><p>Quantum circuit optimization is an inevitable task with the current noisy quantum backends. This task is considered non-trivial due to the varying circuits’ complexities in addition to hardware-specific noise, topology, and limited connectivity. The currently available methods either rely on heuristics for circuit optimization tasks or reinforcement learning with complex unscalable neural networks such as transformers. In this paper, we are concerned with optimizing the initial logical-to-physical mapping selection. Specifically, we investigate whether a reinforcement learning agent with simple scalable neural network is capable of finding a near-optimal logical-to-physical mapping, that would decrease as much as possible additional CNOT gates, only from a fixed-length feature vector. To answer this question, we train a Maskable Proximal Policy Optimization agent to progressively take steps towards a near-optimal logical-to-physical mapping on a 20-qubit hardware architecture. Our results show that our agent coupled with a simple routing evaluation is capable of outperforming other available reinforcement learning and heuristics approaches on 12 out of 19 test benchmarks, achieving geometric mean improvements of 2.2% and 15% over the best available related work and two heuristics approaches, respectively. Additionally, our neural network model scales linearly as the number of qubits increases.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-024-00225-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid protocols for multi-party semiquantum private comparison, multiplication and summation without a pre-shared key based on d-dimensional single-particle states 基于 d 维单粒子态的无预共享密钥多方半量子私有比较、乘法和求和混合协议

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-13 DOI: 10.1140/epjqt/s40507-024-00228-y

Jiang-Yuan Lian, Tian-Yu Ye

{"title":"Hybrid protocols for multi-party semiquantum private comparison, multiplication and summation without a pre-shared key based on d-dimensional single-particle states","authors":"Jiang-Yuan Lian, Tian-Yu Ye","doi":"10.1140/epjqt/s40507-024-00228-y","DOIUrl":"10.1140/epjqt/s40507-024-00228-y","url":null,"abstract":"<div><p>In this paper, by utilizing <i>d</i>-dimensional single-particle states, three semiquantum cryptography protocols, i.e., the multi-party semiquantum private comparison (MSQPC) protocol, the multi-party semiquantum multiplication (MSQM) protocol and the multi-party semiquantum summation (MSQS) protocol, can be achieved simultaneously under the assistance of two semi-honest quantum third parties (TPs). Here, the proposed MSQPC scheme is the only protocol which is devoted to judging the size relationship of secret integers from more than two semiquantum participants without a pre-shared key. And the proposed MSQM protocol absorbs the innovative concept of semiquantumness into quantum multiplication for the first time, which can calculate the modulo <i>d</i> multiplication of private inputs from more than two semiquantum users. As for the proposed MSQS protocol, it is the only semiquantum summation protocol which aims to accomplish the modulo <i>d</i> addition of more than three semiquantum users’ private integers. Neither quantum entanglement swapping nor unitary operations are necessary in the three proposed protocols. The security analysis verifies in detail that both the external attacks and the internal attacks can be resisted in the three proposed protocols.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-024-00228-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Introductory quantum information science coursework at US institutions: content coverage 美国院校的量子信息科学入门课程：内容覆盖面

IF 5.3 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2024-03-07 DOI: 10.1140/epjqt/s40507-024-00226-0

Josephine C. Meyer, Gina Passante, Steven J. Pollock, Bethany R. Wilcox

引用次数: 0