ISSN:
1424-0661
Keywords:
Keywords. Correlation Function, Lattice Spin Systems, Exponential Decay, Witten Laplacian.
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mathematics
,
Physics
Notes:
Abstract. The present paper continues Sjöstrand's study [14] of correlation functions of lattice field theories by means of Witten's deformed Laplacian. Under the assumptions specified in the paper and for sufficiently low temperature, we derive an estimate for the spectral gap of a certain Witten Laplacian which enables us to prove the exponential decay of the two-point correlation function and, further, to derive its asymptotics, as the distance between the spin sites becomes large. Typically, our assumptions do not require uniform strict convexity and apply to Hamiltonian functions which have a single, nondegenerate minimum and no other extremal point.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/PL00001002
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