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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Phase Diagram of 1+1D Abelian-Higgs Model and Its Critical Point
Titas Chanda1,2, Maciej Lewenstein3,4, Jakub Zakrzewski2,5
1The Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy.
Abstract:
We determine the phase diagram of the Abelian-Higgs model in one spatial dimension and time (1+1D) on a lattice. We identify a line of first order phase transitions separating the Higgs region from the confined one. This line terminates in a quantum critical point above which the two regions are connected by a smooth crossover. We analyze the critical point and find compelling evidence for its description as the product of two noninteracting systems: a massless free fermion and a massless free boson. However, we find also some surprising results that cannot be explained by our simple picture, suggesting this newly discovered critical point is an unusual one.
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