Experimental Quantum Simulation of Entanglement in Many-Body Systems

被引：32
|
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.
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页数：4
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