title: A Langevin canonical approach to the dynamics of chiral systems: populations and coherences.
abstract: A canonical framework for chiral two-level systems coupled to a bath of harmonic oscillators is developed to extract, from a stochastic dynamics, the thermodynamic equilibrium values of both the population difference and coherences. The incoherent and coherent tunneling regimes are analyzed for an Ohmic environment in terms of a critical temperature defined by the maximum of the heat capacity. The corresponding numerical results issued from solving a non-linear coupled system of equations are fitted to approximate path-integral analytical expressions beyond the so-called non-interacting blip approximation in order to determine the different time scales governing both regimes.
authors.affiliation: Instituto Superior de Tecnología y Ciencias Aplicadas, Ave. Salvador Allende y Luaces, Quinta de Los Molinos, Plaza La Habana 10600, Cuba.
authors.forename: Helen Clara
authors.initials: HC
authors.lastname: Peñate-Rodríguez
authors.forename: Anais
authors.initials: A
authors.lastname: Dorta-Urra
authors.forename: Pedro
authors.initials: P
authors.lastname: Bargueño
authors.forename: German
authors.initials: G
authors.lastname: Rojas-Lorenzo
authors.forename: Salvador
authors.initials: S
authors.lastname: Miret-Artés
keywords: optical activity; stochastic dynamics; two level systems