arXiv - PHYS - Quantum Physics最新文献_第8页

Quantum Entanglement Allocation through a Central Hub 通过中央枢纽分配量子纠缠

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.08173

Yu-Ao Chen, Xia Liu, Chenghong Zhu, Lei Zhang, Junyu Liu, Xin Wang

{"title":"Quantum Entanglement Allocation through a Central Hub","authors":"Yu-Ao Chen, Xia Liu, Chenghong Zhu, Lei Zhang, Junyu Liu, Xin Wang","doi":"arxiv-2409.08173","DOIUrl":"https://doi.org/arxiv-2409.08173","url":null,"abstract":"Establishing a fully functional quantum internet relies on the efficient\u0000allocation of multipartite entangled states, which enables advanced quantum\u0000communication protocols, secure multipartite quantum key distribution, and\u0000distributed quantum computing. In this work, we propose local operations and\u0000classical communication (LOCC) protocols for allocating generalized $N$-qubit W\u0000and GHZ states within a centralized hub architecture, where the central hub\u0000node preshares Bell states with each end node. Our protocols deterministically\u0000and exactly distribute these states using only $N$ qubits of quantum memory\u0000within the central system, with communication costs of $2N - 2$ and $N$\u0000classical bits for W and GHZ states, respectively. These resource-efficient\u0000protocols are further proven to be optimal within the centralized hub\u0000architecture, outperforming conventional teleportation protocols for\u0000entanglement distribution in both memory and communication costs. Our results\u0000provide a more resource-efficient method for allocating essential multipartite\u0000entangled states in quantum networks, paving the way for the realization of a\u0000quantum internet with enhanced efficiency.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Demonstration of Scully-Drühl-type quantum erasers on quantum computers 量子计算机上的 Scully-Drühl 型量子擦除器演示

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.08053

Bo-Hung Chen, Dah-Wei Chiou, Hsiu-Chuan Hsu

{"title":"Demonstration of Scully-Drühl-type quantum erasers on quantum computers","authors":"Bo-Hung Chen, Dah-Wei Chiou, Hsiu-Chuan Hsu","doi":"arxiv-2409.08053","DOIUrl":"https://doi.org/arxiv-2409.08053","url":null,"abstract":"We present a novel quantum circuit that genuinely implements the\u0000Scully-Dr\"uhl-type delayed-choice quantum eraser, where the two recorders of\u0000the which-way information directly interact with the signal qubit and remain\u0000spatially separated. Experiments conducted on IBM Quantum and IonQ processors\u0000demonstrate that the recovery of interference patterns, to varying degrees,\u0000aligns closely with theoretical predictions, despite the presence of systematic\u0000errors. This quantum circuit-based approach, more manageable and versatile than\u0000traditional optical experiments, facilitates arbitrary adjustment of the\u0000erasure and enables a true random choice in a genuine delayed-choice manner. On\u0000the IBM Quantum platform, delay gates can be employed to further defer the\u0000random choice, thereby amplifying the retrocausal effect. Since gate operations\u0000are executed sequentially in time, the system does not have any involvement of\u0000random choice until after the signal qubit has been measured, therefore\u0000eliminating any potential philosophical loopholes regarding retrocausality that\u0000might exist in other experimental setups. Remarkably, quantum erasure is\u0000achieved with delay times up to $sim1,mutext{s}$ without noticeable\u0000decoherence, a feat challenging to replicate in optical setups.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contrasting Statistical Phase Estimation with the Variational Quantum Eigensolver in the era of Early Fault Tolerant Quantum Computation 早期容错量子计算时代的统计相位估计与变异量子求解器的对比

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.07749

Ming-Zhi Chung, Andreas Thomasen, Henry Liao, Ryosuke Imai

{"title":"Contrasting Statistical Phase Estimation with the Variational Quantum Eigensolver in the era of Early Fault Tolerant Quantum Computation","authors":"Ming-Zhi Chung, Andreas Thomasen, Henry Liao, Ryosuke Imai","doi":"arxiv-2409.07749","DOIUrl":"https://doi.org/arxiv-2409.07749","url":null,"abstract":"In this review, we give an overview of the proposed applications in the\u0000early-FTQC (EFTQC) era. Starting from the error correction architecture for EFTQC device, we first\u0000review the recently developed space-time efficient analogue rotation (STAR)\u0000architecture cite{akahoshiPartiallyFaultTolerantQuantum2024}, which is a\u0000partially fault-tolerant error correction architecture. Then, we review the requirements of an EFTQC algorithm. In particular, the class of ground state energy estimation (GSEE) algorithm\u0000known as the statistical phase estimation algorithm (SPE) is studied. We especially cast our attention on two SPE-type algorithms, the\u0000step-function filter-based variant by Lin and Tong (LT22) cite{Lin:2021rwb}\u0000and Gaussian Filter cite{Wang:2022gxu}. Based on the latter, we introduce the Gaussian Fitting algorithm, which uses\u0000an alternative post-processing procedure compared to cite{Wang:2022gxu}. Finally, we systematically simulate the aforementioned algorithms and\u0000Variational Quantum Eigensolver (VQE) using the 1-uCJ ansatz with different\u0000shot counts. Most importantly, we perform noisy simulations based on the STAR\u0000architecture. We find that for estimating the ground state energy of the 4-qubit $H_2$\u0000Hamiltonian in the STO-3G basis, SPE becomes more advantageous over VQE when\u0000the physical error rate is sufficiently low.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acoustic higher-order topological insulator from momentum-space nonsymmorphic symmetries 从动量空间非非晶对称性看声学高阶拓扑绝缘体

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.08196

Jinbing Hu, Kai Zhou, Tianle Song, Xuntao Jiang, Songlin Zhuang, Yi Yang

引用次数: 0

Group delay controlled by the decoherence of a single artificial atom 由单个人造原子的退相干控制的群延迟

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.07731

Y. -T. Cheng, K. -M. Hsieh, B. -Y. Wu, Z. Q. Niu, F. Aziz, Y. -H. Huang, P. Y. Wen, K. -T. Lin, Y. -H. Lin, J. C. Chen, A. F. Kockum, G. -D. Lin, Z. -R. Lin, Y. Lu, I. -C. Hoi

引用次数: 0

Optimizing Qubit Control Pulses for State Preparation 优化用于状态准备的 Qubit 控制脉冲

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.08204

Annika S. Wiening, Joern Bergendahl, Vicente Leyton-Ortega, Peter Nalbach

引用次数: 0

A Vision for a Bohm-Style Theory of Quantum Electrodynamics 对博姆式量子电动力学理论的展望

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.07784

Roderich Tumulka

引用次数: 0

Leveraging non-unital noise for gate-based quantum reservoir computing 利用非数字噪声实现基于门的量子存储计算

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.07886

Francesco Monzani, Emanuele Ricci, Luca Nigro, Enrico Prati

引用次数: 0

Correlated quantum machines beyond the standard second law 超越标准第二定律的相关量子机器

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.07899

Milton Aguilar, Eric Lutz

引用次数: 0

Quantum thermodynamics as a gauge theory 作为量规理论的量子热力学

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-12 DOI: arxiv-2409.07676

Gabriel Fernandez Ferrari, Łukasz Rudnicki, Lucas Chibebe Céleri

{"title":"Quantum thermodynamics as a gauge theory","authors":"Gabriel Fernandez Ferrari, Łukasz Rudnicki, Lucas Chibebe Céleri","doi":"arxiv-2409.07676","DOIUrl":"https://doi.org/arxiv-2409.07676","url":null,"abstract":"Thermodynamics is based on a coarse-grained approach, from which its\u0000fundamental variables emerge, effectively erasing the complicate details of the\u0000microscopic dynamics within a macroscopic system. The strength of\u0000Thermodynamics lies in the universality provided by this paradigm. In contrast,\u0000quantum mechanics focuses on describing the dynamics of microscopic systems,\u0000aiming to make predictions about experiments we perform, a goal shared by all\u0000fundamental physical theories, which are often framed as gauge theories in\u0000modern physics. Recently, a gauge theory for quantum thermodynamics was\u0000introduced, defining gauge invariant work and heat, and exploring their\u0000connections to quantum phenomena. In this work, we extend that theory in two\u0000significant ways. First, we incorporate energy spectrum degeneracies, which\u0000were previously overlooked. Additionally, we define gauge-invariant entropy,\u0000exploring its properties and connections to other physical and informational\u0000quantities. This results in a complete framework for quantum thermodynamics\u0000grounded in the principle of gauge invariance. To demonstrate some implications\u0000of this theory, we apply it to well-known critical systems.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0