Phys. Rev. Lett. 103, 141602 (2009) [4 pages]Covariant Gauge on the Lattice: A New ImplementationReceived 4 August 2009; published 2 October 2009 We derive a new implementation of linear covariant gauges on the lattice, based on a minimizing functional that can be interpreted as the Hamiltonian of a spin-glass model in a random external magnetic field. We show that our method solves most problems encountered in earlier implementations, mostly related to the no-go condition formulated by Giusti [ Nucl. Phys. B498 331 (1997)]. We carry out tests in the SU(2) case in four space-time dimensions. We also present preliminary results for the transverse gluon propagator at different values of the gauge parameter ξ. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.141602
DOI:
10.1103/PhysRevLett.103.141602
PACS:
11.15.Ha, 12.38.Aw
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