Confinement and Lack of Thermalization after Quenches in the Bosonic Schwinger Model

被引：62

作者：

Chanda, Titas ^{[1
]}

Zakrzewski, Jakub ^{[1
,2
]}

Lewenstein, Maciej ^{[3
,4
]}

Tagliacozzo, Luca ^{[5
,6
,7
,8
]}

机构：

[1] Uniwersytet Jagiellonski, Inst Fizyki Teoretycznej, Lojasiewicza 11, Krakow 30348, Poland

[2] Uniwersytet Jagiellonski, Mark Kac Complex Syst Res Ctr, Lojasiewicza 11, Krakow 30348, Poland

[3] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Av Carl Friedrich Gauss 3, Castelldefels 08860, Barcelona, Spain

[4] ICREA, Passeig Lluis Co 23, Barcelona 08010, Spain

[5] Univ Strathclyde, Dept Phys, Glasgow G4 0NG, Lanark, Scotland

[6] Univ Strathclyde, SUPA, Glasgow G4 0NG, Lanark, Scotland

[7] Univ Barcelona, Dept Fis Quant & Astrofis, Marti I Franques 1, Barcelona 08028, Catalonia, Spain

[8] Univ Barcelona, Inst Ciencies Cosmos ICCUB, Marti I Franques 1, Barcelona 08028, Catalonia, Spain

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 18期

关键词：

MATRIX PRODUCT STATES; GAUGE-INVARIANCE; QUANTUM; LATTICE; DYNAMICS; FORMULATION; FIELD;

D O I：

10.1103/PhysRevLett.124.180602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We excite the vacuum of a relativistic theory of bosons coupled to a U(1) gauge field in 1 + 1 dimensions (bosonic Schwinger model) out of equilibrium by creating a spatially separated particle-antiparticle pair connected by a string of electric field. During the evolution, we observe a strong confinement of bosons witnessed by the bending of their light cone, reminiscent of what has been observed for the Ising model [Nat. Phys. 13, 246 (2017)]. As a consequence, for the timescales we are able to simulate, the system evades thermalization and generates exotic asymptotic states. These states are made of two disjoint regions, an external deconfined region that seems to thermalize, and an inner core that reveals an area-law saturation of the entanglement entropy.

引用

页数：7

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