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Title: Probing the Full Distribution of Many-Body Observables By Single-Qubit Interferometry

Abstract

We present an experimental scheme to measure the full distribution of many-body observables in spin systems, both in and out of equilibrium, using an auxiliary qubit as a probe. Here, we focus on the determination of the magnetization and the kink number statistics at thermal equilibrium. The corresponding characteristic functions are related to the analytically continued partition function. Thus, both distributions can be directly extracted from experimental measurements of the coherence of a probe qubit that is coupled to an Ising-type bath, as reported in [X. Peng et al., Phys. Rev. Lett. 114, 010601 (2015)] for the detection of Lee-Yang zeros.

Authors:
 [1];  [2]
  1. Soochow Univ., Suzhou (China); Univ. of Massachusetts, Boston, MA (United States)
  2. Donostia International Physics Center, San Sebastian (Spain); Univ. of Massachusetts, Boston, MA (United States); IKERBASQUE, Basque Foundation for Science, Bilbao (Spain); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1532716
Report Number(s):
LA-UR-19-20144
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 122; Journal Issue: 16; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Xu, Zhenyu, and del Campo, Adolfo. Probing the Full Distribution of Many-Body Observables By Single-Qubit Interferometry. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.122.160602.
Xu, Zhenyu, & del Campo, Adolfo. Probing the Full Distribution of Many-Body Observables By Single-Qubit Interferometry. United States. doi:10.1103/PhysRevLett.122.160602.
Xu, Zhenyu, and del Campo, Adolfo. Fri . "Probing the Full Distribution of Many-Body Observables By Single-Qubit Interferometry". United States. doi:10.1103/PhysRevLett.122.160602.
@article{osti_1532716,
title = {Probing the Full Distribution of Many-Body Observables By Single-Qubit Interferometry},
author = {Xu, Zhenyu and del Campo, Adolfo},
abstractNote = {We present an experimental scheme to measure the full distribution of many-body observables in spin systems, both in and out of equilibrium, using an auxiliary qubit as a probe. Here, we focus on the determination of the magnetization and the kink number statistics at thermal equilibrium. The corresponding characteristic functions are related to the analytically continued partition function. Thus, both distributions can be directly extracted from experimental measurements of the coherence of a probe qubit that is coupled to an Ising-type bath, as reported in [X. Peng et al., Phys. Rev. Lett. 114, 010601 (2015)] for the detection of Lee-Yang zeros.},
doi = {10.1103/PhysRevLett.122.160602},
journal = {Physical Review Letters},
number = 16,
volume = 122,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
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This content will become publicly available on April 26, 2020
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