Journal
PHYSICS LETTERS B
Volume 604, Issue 1-2, Pages 82-90Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2004.10.042
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We study the phase diagram of the 4d compact U(1) gauge theory as a function of the number of Euclidean time slices. We use the helicity modulus [Nucl. Phys. B 686 (2004) 85] as order parameter to probe the phase transitions. The order of the transition along the phase boundaries is studied and the possibility of a continuum limit is discussed. We present new, strong evidence that the T = 0 bulk phase transition is first order. (C) 2004 Elsevier B.V. All rights reserved.
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