Tuesday, November 13, 2012

1211.2357 (F. L. Traversa et al.)

A robust measurement protocol for Bohmian velocities    [PDF]

F. L. Traversa, G. Albareda, M. Di Ventra, X. Oriols
A protocol for measuring Bohmian velocities using two position measurements (each one modeled by a Positive Operator Valued Measure) separated by a finite time-interval is presented. The protocol is very accurate and robust so long as the first measurement uncertainty divided by the finite time-interval between measurements is much larger than the Bohmian velocity, and the system evolves under at potential between measurements. The difference between the Bohmian velocity of the unperturbed state and the measured one is predicted to be much smaller than 1% in a large range of parameters. Counter-intuitively, the measured velocity is that at the final time and not a time-averaged value between measurements.
View original: http://arxiv.org/abs/1211.2357

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