Abstract
We study non-equilibrium phase transitions at finite temperature in a fully frustrated Josephson junction array driven by a uniform current. We calculate the chiral order parameter of Z 2 symmetry and the transverse helicity modulus (related to the U(1) symmetry) as a function of temperature. For large currents we find that the Z 2 transition occurs at a temperature T Z2 (I) which is lower than the temperature T U(1) (I) for the U(1) transition. Both transitions could be observed experimentally from measurements of the longitudinal and transverse voltages.
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