Quasiparticle engineering and entanglement propagation in a quantum many-body system

被引：685

作者：

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

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

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

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

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

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

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

机构：

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

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

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

来源：

NATURE | 2014年 / 511卷 / 7508期

基金：

奥地利科学基金会; 欧洲研究理事会;

关键词：

LIEB-ROBINSON BOUNDS; STATES; COMPUTATION; EMERGENCE;

D O I：

10.1038/nature13461

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The key to explaining and controlling a range of quantum phenomena is to study how information propagates around many-body systems. Quantum dynamics can be described by particle-like carriers of information that emerge in the collective behaviour of the underlying system, the so-called quasiparticles(1). These elementary excitations are predicted to distribute quantum information in a fashion determined by the system's interactions(2). Here we report quasiparticle dynamics observed in a quantum many-body system of trapped atomic ions(3,4). First, we observe the entanglement distributed by quasiparticles as they trace out light-cone-like wavefronts(5-11). Second, using the ability to tune the interaction range in our system, we observe information propagation in an experimental regime where the effective-light-cone picture does not apply(7,12). Our results will enable experimental studies of a range of quantum phenomena, including transport(13,14), thermalization(15), localization(16) and entanglement growth(17), and represent a first step towards a newquantum-optic regime of engineered quasiparticles with tunable nonlinear interactions.

引用

页码：202 / +

页数：11

共 36 条

[31] Quantum criticality: Competing ground states in low dimensions [J].