By utilizing notions from statistical mechanics, we develop a general and selfconsistent theoretical framework capable of describing any weakly nonlinear optical multimode system involving conserved quantities. We derive the fundamental relations that govern the grand canonical ensemble through maximization of the Gibbs entropy at equilibrium. In this classical picture of statistical photomechanics, we obtain analytical expressions for the probability distribution, the grand partition function, and the relevant thermodynamic potentials. Our results universally apply to any other weakly nonlinear multimode bosonic system.
 Award ID(s):
 2226387
 NSFPAR ID:
 10397534
 Date Published:
 Journal Name:
 Papers in Physics
 Volume:
 15
 ISSN:
 18524249
 Page Range / eLocation ID:
 150001
 Format(s):
 Medium: X
 Sponsoring Org:
 National Science Foundation
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