Spectrum in multi-species asymmetric simple exclusion process on a ring

Chikashi Arita, Atsuo Kuniba, Kazumitsu Sakai, Tsuyoshi Sawabe

Published Jul 31, 2009• 51 citations

Abstract

The spectrum of Hamiltonian (Markov matrix) of a multi-species asymmetric simple exclusion process on a ring is studied. The dynamical exponent concerning the relaxation time is found to coincide with the one-species case. It implies that the system belongs to the Kardar-Parisi-Zhang or Edwards-Wilkinson universality classes depending on whether the hopping rate is asymmetric or symmetric, respectively. Our derivation exploits a poset structure of the particle sectors, leading to a new spectral duality and inclusion relations. The Bethe ansatz integrability is also demonstrated.

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