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Entropy 2016, 18(10), 354; doi:10.3390/e18100354

A Langevin Canonical Approach to the Study of Quantum Stochastic Resonance in Chiral Molecules

1
Instituto Superior de Tecnologías y Ciencias Aplicadas, Ave. Salvador Allende y Luaces, Quinta de Los Molinos, Plaza La Habana 10600, Cuba
2
Departamento de Física, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Bogotá 110111, Colombia
3
Departamento de Física, Universidad de los Andes, Bogotá 111711, Colombia
4
Instituto de Física Fundamental (CSIC), Serrano 123, Madrid 28006, Spain
*
Author to whom correspondence should be addressed.
Academic Editors: Antonio M. Scarfone, Jay Lawrence and Kevin H. Knuth
Received: 22 July 2016 / Revised: 21 September 2016 / Accepted: 26 September 2016 / Published: 29 September 2016
(This article belongs to the Section Statistical Mechanics)
View Full-Text   |   Download PDF [378 KB, uploaded 29 September 2016]   |  

Abstract

A Langevin canonical framework for a chiral two-level system coupled to a bath of harmonic oscillators is used within a coupling scheme different from the well-known spin-boson model to study the quantum stochastic resonance for chiral molecules. This process refers to the amplification of the response to an external periodic signal at a certain value of the noise strength, being a cooperative effect of friction, noise, and periodic driving occurring in a bistable system. Furthermore, from this stochastic dynamics within the Markovian regime and Ohmic friction, the competing process between tunneling and the parity violating energy difference present in this type of chiral systems plays a fundamental role. This mechanism is finally proposed to observe the so-far elusive parity-violating energy difference in chiral molecules. View Full-Text
Keywords: chirality; two-level system; parity violating energy difference; quantum stochastic resonance chirality; two-level system; parity violating energy difference; quantum stochastic resonance
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Rojas-Lorenzo, G.; Peñate-Rodríguez, H.C.; Dorta-Urra, A.; Bargueño, P.; Miret-Artés, S. A Langevin Canonical Approach to the Study of Quantum Stochastic Resonance in Chiral Molecules. Entropy 2016, 18, 354.

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