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From measurements to quantum friction

Stephen M Barnett1, John Jeffers1 and James D Cresser2

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We present a quantum theory of friction in which interactions with the surrounding medium are described by generalized measurements of the particle's position and momentum. The theory predicts intrinsically quantum contributions to the particle's steady-state energy and to the associated diffusion in position. We discuss the physical significance of these and demonstrate their significance in ensuring a well behaved theory.


PACS

03.65.Ta Foundations of quantum mechanics; measurement theory

05.40.Jc Brownian motion

05.60.Gg Quantum transport

Subjects

Statistical physics and nonlinear systems

Quantum information and quantum mechanics

Dates

Issue 16 (26 April 2006)

Received 25 July 2005, in final form 15 September 2005

Published 3 April 2006



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