Direct Observation of Dynamical Quantum Phase Transitions in an Interacting Many-Body System

被引：418

作者：

Jurcevic, P. ^{[1
,2
]}

Shen, H. ^{[1
]}

Hauke, P. ^{[1
,3
]}

Maier, C. ^{[1
,2
]}

Brydges, T. ^{[1
,2
]}

Hempel, C. ^{[1
,6
]}

Lanyon, B. P. ^{[1
,2
]}

Heyl, M. ^{[4
,5
]}

Blatt, R. ^{[1
,2
]}

Roos, C. F. ^{[1
,2
]}

机构：

[1] Austrian Acad Sci, Inst Quantenopt & Quanteninformat, Technikerstr 21A, A-6020 Innsbruck, Austria

[2] Univ Innsbruck, Inst Expt Phys, Technikerstr 25, A-6020 Innsbruck, Austria

[3] Univ Innsbruck, Inst Theoret Phys, Technikerstr 25, A-6020 Innsbruck, Austria

[4] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[5] Tech Univ Munich, Phys Dept, D-85747 Garching, Germany

[6] Univ Sydney, Sch Phys, ARC Ctr Excellence Engn Quantum Syst, Sydney, NSW 2006, Australia

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 08期

基金：

奥地利科学基金会; 欧洲研究理事会;

关键词：

SIMULATOR; LOCALIZATION; ENTANGLEMENT; EQUILIBRIUM; LATTICE; STATES;

D O I：

10.1103/PhysRevLett.119.080501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The theory of phase transitions represents a central concept for the characterization of equilibrium matter. In this work we study experimentally an extension of this theory to the nonequilibrium dynamical regime termed dynamical quantum phase transitions (DQPTs). We investigate and measure DQPTs in a string of ions simulating interacting transverse-field Ising models. During the nonequilibrium dynamics induced by a quantum quench we show for strings of up to 10 ions the direct detection of DQPTs by revealing nonanalytic behavior in time. Moreover, we provide a link between DQPTs and the dynamics of other quantities such as the magnetization, and we establish a connection between DQPTs and entanglement production.

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页数：5

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