Scaling Laws for Fluxon Formation in Annular Josephson Tunnel Junctions
Although equilibrium, or adiabatic, correlation lengths ξ ad (T) diverge at the critical temperature T c of continuous phase transitions, correlation lengths always remain bounded, in practice. This is because causality prevents a system becoming ordered on very large scales within the finite time in which transitions are implemented. In consequence, the order parameter fields become frustrated, and defects arise to mediate between the different equivalent ground states of the system. By observing these defects we obtain a direct experimental guide to the way in which the transition has been implemented.
KeywordsThermal Cycle Correlation Length Critical Current Density Continuous Phase Transition Josephson Tunnel Junction
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