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Open Quantum Systems Decoherence

Velocity-dependent optical forces and Maxwell's demon

arXiv

Authors: J. D. Franson

Year

2017

Paper ID

44408

Status

Preprint

Abstract Read

~2 min

Abstract Words

127

Citations

N/A

Abstract

An atom placed in a focused laser beam will experience a dipole force due to the gradient in the interaction energy, which is analogous to the well-known optical tweezers effect. This force will be dependent on the velocity of the atom due to the Doppler effect, which could potentially be used to implement a Maxwell's demon. Photon scattering and other forms of dissipation can be negligibly small, which would seem to contradict quantum information proofs that a Maxwell's demon must dissipate a minimum amount of energy. We show that the velocity dependence of the dipole force is cancelled out by another force that is related to the gradient in the phase of the laser beam. As a result, a Maxwell's demon cannot be implemented in this way.

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This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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An atom placed in a focused laser beam will experience a dipole force due to the gradient in the interaction energy, which is analogous to the well-known optical tweezers effect.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1707.08059 [2] arXiv https://arxiv.org/abs/1707.08059 [3] Publisher https://arxiv.org/abs/1707.08059

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