Density Induced Phase Transitions in the Schwinger Model: A Study with Matrix Product States

被引：70

作者：

Banuls, Mari Carmen ^{[1
]}

Cichy, Krzysztof ^{[2
,3
]}

Cirac, J. Ignacio ^{[1
]}

Jansen, Karl ^{[4
]}

Kuehn, Stefan ^{[1
]}

机构：

[1] Max Planck Inst Quantum Opt, Hans Kopfermann Str 1, D-85748 Garching, Germany

[2] Goethe Univ Frankfurt Main, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[3] Adam Mickiewicz Univ, Fac Phys, Umultowska 85, PL-61614 Poznan, Poland

[4] DESY Zeuthen, NIC, Platanenallee 6, D-15738 Zeuthen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 07期

关键词：

LATTICE GAUGE-THEORIES; ENTANGLED PAIR STATES; FINITE-DENSITY; CONFINEMENT; FORMULATION; SYSTEMS;

D O I：

10.1103/PhysRevLett.118.071601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We numerically study the zero temperature phase structure of the multiflavor Schwinger model at nonzero chemical potential. Using matrix product states, we reproduce analytical results for the phase structure for two flavors in the massless case and extend the computation to the massive case, where no analytical predictions are available. Our calculations allow us to locate phase transitions in the mass-chemical potential plane with great precision and provide a concrete example of tensor networks overcoming the sign problem in a lattice gauge theory calculation.

引用

页数：5

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