Microcanonical fermionic average method in the Schwinger model: A realistic computation of the chiral condensate

The microcanonical fermionic average method has been used so far in the context of lattice models with phase transitions at finite coupling. To test its applicability to asymptotically free theories, we have implemented it in two-dimensional QED, i.e., the Schwinger model. We exploit the possibility...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. D, Particles and fields Particles and fields, 1994-12, Vol.50 (11), p.6994-6997
Main Authors: Azcoiti, V, V, Di Carlo G, Galante, A, Grillo, AF, Laliena, V, V
Format: Article
Language:English
Subjects:
662110 - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)
662120 - General Theory of Particles & Fields- Symmetry, Conservation Laws, Currents & Their Properties- (1992-)
CHIRAL SYMMETRY
CONDENSATES
COUPLING
ELECTRODYNAMICS
FERMIONS
FIELD THEORIES
LATTICE FIELD THEORY
PHASE TRANSFORMATIONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
SIMULATION
SYMMETRY
TWO-DIMENSIONAL CALCULATIONS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The microcanonical fermionic average method has been used so far in the context of lattice models with phase transitions at finite coupling. To test its applicability to asymptotically free theories, we have implemented it in two-dimensional QED, i.e., the Schwinger model. We exploit the possibility, intrinsic to this method, of studying the whole [beta],[ital m] plane without extra computer cost, to follow constant physics trajectories and measure the [ital m][r arrow]0 limit of the chiral condensate. We recover the continuum result within three decimal places. Moreover, the possibility, intrinsic to the method, of performing simulations directly in the chiral limit allows us to compute the average plaquette energy at [ital m]=0, the result being in perfect agreement with the expected value.
ISSN:0556-2821
1089-4918
DOI:10.1103/PhysRevD.50.6994