Experimental Quantum Simulation of Entanglement in Many-Body Systems

被引：33

作者：

Zhang, Jingfu ^{[1
,2
]}

Wei, Tzu-Chieh ^{[1
,2
,4
]}

Laflamme, Raymond ^{[1
,2
,3
]}

机构：

[1] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

[2] Univ Waterloo, Dept Phys, Waterloo, ON N2L 3G1, Canada

[3] Perimeter Inst Theoret Phys, Waterloo, ON N2J 2W9, Canada

[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

PHASE-TRANSITIONS; COMPUTATION;

D O I：

10.1103/PhysRevLett.107.010501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We employ a nuclear magnetic resonance (NMR) quantum information processor to simulate the ground state of an XXZ spin chain and measure its NMR analog of entanglement, or pseudoentanglement. The observed pseudoentanglement for a small-size system already displays a singularity, a signature which is qualitatively similar to that in the thermodynamical limit across quantum phase transitions, including an infinite-order critical point. The experimental results illustrate a successful approach to investigate quantum correlations in many-body systems using quantum simulators.

引用

页数：4

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