Asoke N. Mitra. Can Environmental Decoherence be Reversed for an Open Quantum System in a Magnetic field ?

Natural Sciences / Physics / Electromagnetism

Submitted on: May 30, 2012, 12:40:16

Description: A simple model is considered for an open system consisting of an aggregation of magnetic particles (like greigite) in the presence of a magnetic field (H), and interacting linearly with a bath of 3D harmonic oscillators. Using the Feynman-Vernon formalism, as given in Weiss (termed FVW), the time-evolved reduced density matrix (after eliminating the bath d.o.f.'s), is examined for environmental decoherence as defined in the FVW formalism. While decoherence is usually positive for most two-way couplings with the environment, it is found that a $three-way$ interaction involving the system plus bath plus H-field all together, can facilitate a $reversal$ of sign of this quantity ! This may have implications for quantum coherence based phenomena in the origins of life.

The full-text article has been published in the "IntellectualArchive" journal , Vol.1, Num.1, May 2012, ISSN 1929-4700.

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Magnetic coherence.pdf

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