STUDY OF SPHALERON TRANSITIONS BY MEANS OF THE REAL-TIME LANGEVIN EQUATION

被引：26

作者：

BOCHKAREV, AI ^{[1
]}

DEFORCRAND, P ^{[1
]}

机构：

[1] ACAD SCI USSR,INST NUCL RES,MOSCOW 117312,USSR

来源：

PHYSICAL REVIEW D | 1991年 / 44卷 / 02期

关键词：

D O I：

10.1103/PhysRevD.44.519

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Microscopic Langevin evolution is introduced in Abelian gauge field theory. It is studied numerically in the (1 + 1)-dimensional Abelian Higgs model at finite temperature. The Brownian behavior of the Chem-Simons number is established. Sharp transitions between the classical vacua with different Chern-Simons numbers are observed. The rate of these transitions depends exponentially on the temperature, indicating the relevance of the thermal activation theory involving the sphaleron saddle point.

引用

页码：519 / 527

页数：9

共 23 条

[1] SPHALERONS, SMALL FLUCTUATIONS, AND BARYON-NUMBER VIOLATION IN ELECTROWEAK THEORY [J].

ARNOLD, P ;

MCLERRAN, L .

PHYSICAL REVIEW D, 1987, 36 (02) :581-595

[2] THE SPHALERON STRIKES BACK - A RESPONSE TO OBJECTIONS TO THE SPHALERON APPROXIMATION [J].

ARNOLD, P ;

MCLERRAN, L .

PHYSICAL REVIEW D, 1988, 37 (04) :1020-1029

[3]

Bochkarev A. I., 1987, Modern Physics Letters A, V2, P991, DOI 10.1142/S0217732387001257

[4] STUDY OF KINK-ANTIKINK PAIR PRODUCTION AT FINITE TEMPERATURE BY MEANS OF THE LANGEVIN EQUATION [J].

BOCHKAREV, AI ;

DEFORCRAND, P .

PHYSICAL REVIEW LETTERS, 1989, 63 (21) :2337-2340

[5] ANALYTICAL EVALUATION OF THE ANOMALOUS FERMION-NUMBER NONCONSERVATION AT HIGH-TEMPERATURES IN THE (1+1)-DIMENSIONAL ABELIAN HIGGS-MODEL [J].

BOCHKAREV, AI ;

TSITSISHVILI, GG .

PHYSICAL REVIEW D, 1989, 40 (04) :1378-1380

[6]

BOCHKAREV AI, UNPUB

[7]

BOCHKAREV AI, 1991, PHYS LETT B, V252, P168

[8] STOCHASTIC QUANTIZATION VERSUS THE MICROCANONICAL ENSEMBLE - GETTING THE BEST OF BOTH WORLDS [J].

DUANE, S .

NUCLEAR PHYSICS B, 1985, 257 (05) :652-662

[9] TOPOLOGICAL TRANSITIONS AT FINITE TEMPERATURES - A REAL-TIME NUMERICAL APPROACH [J].

GRIGORIEV, DY ;

RUBAKOV, VA ;

SHAPOSHNIKOV, ME .

NUCLEAR PHYSICS B, 1989, 326 (03) :737-757

[10] SOLITON PAIR CREATION AT FINITE TEMPERATURES - NUMERICAL STUDY IN (1 + 1) DIMENSIONS [J].

GRIGORIEV, DY ;

RUBAKOV, VA .

NUCLEAR PHYSICS B, 1988, 299 (01) :67-78

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