Fermion condensates in two colours finite density QCD at strong coupling

被引：32

作者：

Aloisio, R

Azcoiti, V ^{[1
]}

Di Carlo, G

Galante, A

Grillo, AF

机构：

[1] Univ Zaragoza, Fac Ciencias, Dept Fis Teor, E-50009 Zaragoza, Spain

[2] Univ Aquila, Dipartimento Fis, I-67100 Laquila, Italy

[3] Ist Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, Italy

[4] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Laquila, Italy

来源：

PHYSICS LETTERS B | 2000年 / 493卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(00)01108-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study unquenched lattice SU(2) at nonzero chemical potential at strong coupling and with eight flavours of Kogut-Susskind fermions, introducing a diquark source term we analyze the behaviour of different types of fermion condensates. Using a non standard approach we can obtain results at zero external source without extrapolations. We find strong evidences for a (high density) second order phase transition where a diquark condensate appears. The corresponding critical chemical potential is in good agreement with half the pion mass. (C) 2000 Published by Elsevier Science B.V.

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页码：189 / 196

页数：8

相关论文

共 22 条

[1] Color-flavor locking and chiral symmetry breaking in high density QCD [J].

Alford, M ;

Rajagopal, K ;

Wilczek, F .

NUCLEAR PHYSICS B, 1999, 537 (1-3) :443-458

[2] QCD at finite baryon density: nucleon droplets and color superconductivity [J].

Alford, M ;

Rajagopal, K ;

Wilczek, F .

PHYSICS LETTERS B, 1998, 422 (1-4) :247-256

[3] Three and two colours finite density QCD at strong coupling: A new look [J].

Aloisio, R ;

Azcoiti, V ;

Di Carlo, G ;

Galante, A ;

Grillo, AF .

NUCLEAR PHYSICS B, 2000, 564 (03) :489-499

[4]

ALOISIO R, HEPLAT0007018

[5]

ALOISIO R, 2000, IN PRESS P INT WORKS

[6] MICROCANONICAL FERMIONIC AVERAGE METHOD FOR MONTE-CARLO SIMULATIONS OF LATTICE GAUGE-THEORIES WITH DYNAMICAL FERMIONS [J].

AZCOITI, V ;

LALIENA, V ;

LUO, XQ ;

PIEDRAFITA, CE ;

DICARLO, G ;

GALANTE, A ;

GRILLO, AF ;

FERNANDEZ, LA ;

VLADIKAS, A .

PHYSICAL REVIEW D, 1993, 48 (01) :402-416

[7] NEW PROPOSAL FOR INCLUDING DYNAMIC FERMIONS IN LATTICE GAUGE-THEORIES - THE COMPACT-QED CASE [J].

AZCOITI, V ;

DICARLO, G ;

GRILLO, AF .

PHYSICAL REVIEW LETTERS, 1990, 65 (18) :2239-2242

[8] CHIRAL SUSCEPTIBILITIES IN NONCOMPACT QED, A NEW DETERMINATION OF THE GAMMA-EXPONENT AND THE CRITICAL COUPLINGS [J].

AZCOITI, V ;

DICARLO, G ;

GALANTE, A ;

GRILLO, AF ;

LALIENA, V ;

PIEDRAFITA, CE .

PHYSICS LETTERS B, 1995, 353 (2-3) :279-283

[9] MICROCANONICAL FERMIONIC AVERAGE METHOD IN THE SCHWINGER MODEL - A REALISTIC COMPUTATION OF THE CHIRAL CONDENSATE [J].

AZCOITI, V ;

DICARLO, G ;

GALANTE, A ;

GRILLO, AF ;

LALIENA, V .

PHYSICAL REVIEW D, 1994, 50 (11) :6994-6997

[10] SPONTANEOUS SYMMETRY-BREAKING IN FERMION-GAUGE SYSTEMS - A NON STANDARD APPROACH [J].

AZCOITI, V ;

LALIENA, V ;

LUO, XQ .

PHYSICS LETTERS B, 1995, 354 (1-2) :111-116