发布求助
文献互助 智能选刊 最新文献

arXiv - PHYS - Quantum Physics最新文献

筛选
英文 中文
A quantum protocol for applying arbitrary phase transformations 应用任意相变的量子协议
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11020
Siavash Davani, Falk Eilenberger
{"title":"A quantum protocol for applying arbitrary phase transformations","authors":"Siavash Davani, Falk Eilenberger","doi":"arxiv-2409.11020","DOIUrl":"https://doi.org/arxiv-2409.11020","url":null,"abstract":"Given an operator that produces the state\u0000$|phirangle=sumphi(x),|xrangle$, we propose a quantum protocol that\u0000transforms any input state of the form $|psirangle=sumpsi(x),|xrangle$ to\u0000$|psi'rangle=sumpsi(x),e^{ialpha|phi(x)|^2},|xrangle$. This protocol\u0000is thus programmable in the sense that one can use it to apply different phase\u0000profiles $e^{ialpha|phi(x)|^2}$ by choosing different $|phirangle$ states\u0000as the input parameter at each run. Therefore, the problem of applying phases\u0000to a signal via a quantum computer is reduced to the problem of initializing a\u0000state $|phirangle$ that corresponds to the desired phase profile.\u0000Furthermore, we discuss possible applications of this protocol, most\u0000importantly in Hamiltonian simulation.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248160","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
Harvesting magic from the vacuum 从真空中获取魔力
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11473
Ron Nyström, Nicola Pranzini, Esko Keski-Vakkuri
{"title":"Harvesting magic from the vacuum","authors":"Ron Nyström, Nicola Pranzini, Esko Keski-Vakkuri","doi":"arxiv-2409.11473","DOIUrl":"https://doi.org/arxiv-2409.11473","url":null,"abstract":"Magic is the quantum resource allowing a quantum computer to perform\u0000operations that cannot be simulated efficiently by classical computation. As\u0000such, generating magic in a quantum system is crucial for achieving quantum\u0000advantage. This letter shows that magic can be harvested by a three-level\u0000Unruh-DeWitt detector (a qutrit) interacting with a quantum field in an initial\u0000vacuum state. While the idea of extracting resources from Quantum Field\u0000Theories (QFT) was born from the harvesting of entanglement, our result extends\u0000the protocol to evolve a qutrit from a non-magical state to a magical one,\u0000making it possible to generate magic from QFT.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248105","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
Dynamical topological phase transition in cold Rydberg quantum gases 冷雷德堡量子气体中的动态拓扑相变
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11035
Jun Zhang, Ya-Jun Wang, Bang Liu, Li-Hua Zhang, Zheng-Yuan Zhang, Shi-Yao Shao, Qing Li, Han-Chao Chen, Yu Ma, Tian-Yu Han, Qi-Feng Wang, Jia-Dou Nan, Yi-Ming Yin, Dong-Yang Zhu, Bao-Sen Shi, Dong-Sheng Ding
{"title":"Dynamical topological phase transition in cold Rydberg quantum gases","authors":"Jun Zhang, Ya-Jun Wang, Bang Liu, Li-Hua Zhang, Zheng-Yuan Zhang, Shi-Yao Shao, Qing Li, Han-Chao Chen, Yu Ma, Tian-Yu Han, Qi-Feng Wang, Jia-Dou Nan, Yi-Ming Yin, Dong-Yang Zhu, Bao-Sen Shi, Dong-Sheng Ding","doi":"arxiv-2409.11035","DOIUrl":"https://doi.org/arxiv-2409.11035","url":null,"abstract":"Study of phase transitions provide insights into how a many-body system\u0000behaves under different conditions, enabling us to understand the symmetry\u0000breaking, critical phenomena, and topological properties. Strong long-range\u0000interactions in highly excited Rydberg atoms create a versatile platform for\u0000exploring exotic emergent topological phases. Here, we report the experimental\u0000observation of dynamical topological phase transitions in cold Rydberg atomic\u0000gases under a microwave field driving. By measuring the system transmission\u0000curves while varying the probe intensity, we observe complex hysteresis\u0000trajectories characterized by distinct winding numbers as they cross the\u0000critical point. At the transition state, where the winding number flips, the\u0000topology of these hysteresis trajectories evolves into more non-trivial\u0000structures. The topological trajectories are shown to be robust against noise,\u0000confirming their rigidity in dynamic conditions. These findings contribute to\u0000the insights of emergence of complex dynamical topological phases in many-body\u0000systems.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248278","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
Multipartite entanglement vs nonlocality for two families of $N$-qubit states N$ 量子比特两族的多方纠缠与非局域性
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.10888
Sanchit Srivastava, Shohini Ghose
{"title":"Multipartite entanglement vs nonlocality for two families of $N$-qubit states","authors":"Sanchit Srivastava, Shohini Ghose","doi":"arxiv-2409.10888","DOIUrl":"https://doi.org/arxiv-2409.10888","url":null,"abstract":"Quantum states of multiple qubits can violate Bell-type inequalities when\u0000there is entanglement present between the qubits, indicating nonlocal behaviour\u0000of correlations. We analyze the relation between multipartite entanglement and\u0000genuine multipartite nonlocality, characterized by Svetlichny inequality\u0000violations, for two families of $N-$qubit states. We show that for the\u0000generalized GHZ family of states, Svetlichny inequality is not violated when\u0000the $n-$tangle is less than $1/2$ for any number of qubits. On the other hand,\u0000the maximal slice states always violate the Svetlichny inequality when\u0000$n-$tangle is nonzero, and the violation increases monotonically with tangle\u0000when the number of qubits is even. Our work generalizes the relations between\u0000tangle and Svetlichny inequality violation previously derived for three qubits.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248162","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
Quantifying nonclassical correlation via the generalized Wigner-Yanase skew information 通过广义 Wigner-Yanase 偏斜信息量化非经典相关性
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11198
Yan Hong, Xinlan Hao, Limin Gao
{"title":"Quantifying nonclassical correlation via the generalized Wigner-Yanase skew information","authors":"Yan Hong, Xinlan Hao, Limin Gao","doi":"arxiv-2409.11198","DOIUrl":"https://doi.org/arxiv-2409.11198","url":null,"abstract":"Nonclassical correlation is an important concept in quantum information\u0000theory, referring to a special type of correlation that exists between quantum\u0000systems, which surpasses the scope of classical physics. In this paper, we\u0000introduce the concept of a family of information with important properties,\u0000namely the generalized Wigner-Yanase skew information, of which the famous\u0000quantum Fisher information and Wigner-Yanase skew information are special\u0000cases.We classify the local observables in the generalized Wigner-Yanase skew\u0000information into two categories (i.e., orthonormal bases and a Hermitian\u0000operator with a fixed nondegenerate spectrum), and based on this, we propose\u0000two different forms of indicators to quantify nonclassical correlations of\u0000bipartite quantum states. We have not only investigated some important\u0000properties of these two kinds of indicators but also illustrated through\u0000specific examples that they can indeed capture some nonclassical correlations.\u0000Furthermore, we find that these two types of indicators reduce to entanglement\u0000measure for bipartite pure states. Specifically, we also derive the\u0000relationship between these two indicators and the entanglement measure\u0000$I$-concurrence.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248157","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
Challenging Excited States from Adaptive Quantum Eigensolvers: Subspace Expansions vs. State-Averaged Strategies 挑战自适应量子均衡器的激发态：子空间展开与状态平均策略
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11210
Harper R. Grimsley, Francesco A. Evangelista
{"title":"Challenging Excited States from Adaptive Quantum Eigensolvers: Subspace Expansions vs. State-Averaged Strategies","authors":"Harper R. Grimsley, Francesco A. Evangelista","doi":"arxiv-2409.11210","DOIUrl":"https://doi.org/arxiv-2409.11210","url":null,"abstract":"The prediction of electronic structure for strongly correlated molecules\u0000represents a promising application for near-term quantum computers. Significant\u0000attention has been paid to ground state wavefunctions, but excited states of\u0000molecules are relatively unexplored. In this work, we consider the ADAPT-VQE\u0000algorithm, a single-reference approach for obtaining ground states, and its\u0000state-averaged generalization for computing multiple states at once. We\u0000demonstrate for both rectangular and linear H$_4$, as well as for BeH$_2$, that\u0000this approach, which we call MORE-ADAPT-VQE, can make better use of small\u0000excitation manifolds than an analagous method based on a single-reference\u0000ADAPT-VQE calculation, q-sc-EOM. In particular, MORE-ADAPT-VQE is able to\u0000accurately describe both avoided crossings and crossings between states of\u0000different symmetries. In addition to more accurate excited state energies,\u0000MORE-ADAPT-VQE can recover accurate transition dipole moments in situations\u0000where traditional ADAPT-VQE and q-sc-EOM struggle. These improvements suggest a\u0000promising direction toward the use of quantum computers for difficult excited\u0000state problems.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248158","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
Multiphoton interference in a single-spatial-mode quantum walk 单空间模式量子行走中的多光子干扰
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11483
Kate L. Fenwick, Jonathan Baker, Guillaume S. Thekkadath, Aaron Z. Goldberg, Khabat Heshami, Philip J. Bustard, Duncan England, Frédéric Bouchard, Benjamin Sussman
{"title":"Multiphoton interference in a single-spatial-mode quantum walk","authors":"Kate L. Fenwick, Jonathan Baker, Guillaume S. Thekkadath, Aaron Z. Goldberg, Khabat Heshami, Philip J. Bustard, Duncan England, Frédéric Bouchard, Benjamin Sussman","doi":"arxiv-2409.11483","DOIUrl":"https://doi.org/arxiv-2409.11483","url":null,"abstract":"Multiphoton interference is crucial to many photonic quantum technologies. In\u0000particular, interference forms the basis of optical quantum information\u0000processing platforms and can lead to significant computational advantages. It\u0000is therefore interesting to study the interference arising from various states\u0000of light in large interferometric networks. Here, we implement a quantum walk\u0000in a highly stable, low-loss, multiport interferometer with up to 24 ultrafast\u0000time bins. This time-bin interferometer comprises a sequence of birefringent\u0000crystals which produce pulses separated by 4.3,ps, all along a single optical\u0000axis. Ultrafast Kerr gating in an optical fiber is employed to time-demultiplex\u0000the output from the quantum walk. We measure one-, two-, and three-photon\u0000interference arising from various input state combinations, including a\u0000heralded single-photon state, a thermal state, and an attenuated coherent state\u0000at one or more input ports. Our results demonstrate that ultrafast time bins\u0000are a promising platform to observe large-scale multiphoton interference.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248103","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
Evaluating Modifications to Classifiers for Identification of Higgs Bosons 评估为识别希格斯玻色子而对分类器进行的修改
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.10902
Rishivarshil Nelakurti, Christopher Hill
{"title":"Evaluating Modifications to Classifiers for Identification of Higgs Bosons","authors":"Rishivarshil Nelakurti, Christopher Hill","doi":"arxiv-2409.10902","DOIUrl":"https://doi.org/arxiv-2409.10902","url":null,"abstract":"The Higgs boson, discovered back in 2012 through collision data at the Large\u0000Hadron Collider (LHC) by ATLAS and CMS experiments, marked a significant\u0000inflection point in High Energy Physics (HEP). Today, it's crucial to precisely\u0000measure Higgs production processes with LHC experiments in order to gain\u0000insights into the universe and find any invisible physics. To analyze the vast\u0000data that LHC experiments generate, classical machine learning has become an\u0000invaluable tool. However, classical classifiers often struggle with detecting\u0000higgs production processes, leading to incorrect labeling of Higgs Bosons. This\u0000paper aims to tackle this classification problem by investigating the use of\u0000quantum machine learning (QML).","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248281","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
In-situ measurements of light diffusion in an optically dense atomic ensemble 光学致密原子集合体中光扩散的现场测量
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11117
Antoine Glicenstein, Apoorva Apoorva, Daniel Benedicto Orenes, Hector Letellier, Alvaro Mitchell Galvão de Melo, Raphaël Saint-Jalm, Robin Kaiser
{"title":"In-situ measurements of light diffusion in an optically dense atomic ensemble","authors":"Antoine Glicenstein, Apoorva Apoorva, Daniel Benedicto Orenes, Hector Letellier, Alvaro Mitchell Galvão de Melo, Raphaël Saint-Jalm, Robin Kaiser","doi":"arxiv-2409.11117","DOIUrl":"https://doi.org/arxiv-2409.11117","url":null,"abstract":"This study introduces a novel method to investigate in-situ light transport\u0000within optically thick ensembles of cold atoms, exploiting the internal\u0000structure of alkaline-earth metals. A method for creating an optical excitation\u0000at the center of a large atomic cloud is demonstrated, and we observe its\u0000propagation through multiple scattering events. In conditions where the cloud\u0000size is significantly larger than the transport mean free path, a diffusive\u0000regime is identified. We measure key parameters including the diffusion\u0000coefficient, transport velocity, and transport time, finding a good agreement\u0000with diffusion models. We also demonstrate that the frequency of the photons\u0000launched inside the system can be controlled. This approach enables direct\u0000time- and space-resolved observation of light diffusion in atomic ensembles,\u0000offering a promising avenue for exploring new diffusion regimes.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248276","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
A remark on quantum measuring systems and the holographic principle 关于量子测量系统和全息原理的评论
arXiv - PHYS - Quantum Physics Pub Date : 2024-09-17 DOI: arxiv-2409.11594
Eiji Konishi
{"title":"A remark on quantum measuring systems and the holographic principle","authors":"Eiji Konishi","doi":"arxiv-2409.11594","DOIUrl":"https://doi.org/arxiv-2409.11594","url":null,"abstract":"It is a sort of ultimate question to examine the continuity of a quantum\u0000measurement subject theoretically and has not yet been resolved within a\u0000scientific framework. In this article, we approach this question and argue that\u0000the continuity of a quantum measurement subject follows as a fundamental\u0000consequence of the holographic principle after the classicalization of the\u0000quantum state of the bulk space.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"197 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248102","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信