Bounds on Correlation Functions of Quantum Rotators
نویسندگان
چکیده
We derive a McBryan-Spencer bound to the correlation function of a one-dimensional array of quantum rotators in the Villain approximation of the cosine interaction. We obtain the partition function of the system in the gas representation and establish a lower bound on the external charges correlation function. We also discuss the possible existence of a KosterlitzThouless phase for the quantum rotators in the Villain approximation.
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تاریخ انتشار 1998