Nondemolition observation of a free quantum particle

Details Nondemolition observation of a free quantum particle Nondemolition observation of a free quantum particle

2005-12-17

arxiv.org/abs/quant-ph/0512138v1

Phys. Rev. A, 45 (1992) No 3, 1347--1356

Physics

Quantum Physics

14 pages. See more related papers at the URL: http://www.maths.nott.ac.uk/personal/vpb/research/

Scientific paper

A stochastic model of a continuous nondemolition observation of a free quantum Brownian motion is presented. The nonlinear stochastic wave equation describing the posterior dynamics of the observed quantum system is solved in a Gaussian case for a free particle of mass m. It is shown that the dispersion of the wave packet does not increase to infinity like for the free unobserved particle but tends to the finite limit.

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