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Environmental rocking ratchet: Environmental rectification by a harmonically driven avoided crossing

  • We propose a rocking ratchet designed as a symmetric quantum two-state system driven by a single periodic harmonic force and influenced symmetrically by thermal fluctuations. We show that the necessary broken symmetry can dynamically be achieved by a thermal environment that couples to the energy difference between the two states and the tunnel coupling between them. The quantum two-state system is driven by the harmonic periodic drive through its avoided crossing. The correspondingly driven dissipative quantum dynamics results on average in a finite population difference between both states. This then causes directed particle transport.

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Author:Peter Nalbach, Nico Klinkenberg, Timo Palm, Niklas Müller
Parent Title (English):Physical Review E
Document Type:Article
Date of Publication (online):2018/02/15
Year of first Publication:2017
Publishing Institution:Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen
Release Date:2018/02/15
First Page:042134
Departments / faculties:Fachbereiche / Wirtschaft und Informationstechnik Bocholt
Licence (German):License LogoEs gilt das Urheberrechtsgesetz

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