Monday, March 5, 2012

1109.4613 (Carlos Alexandre Brasil et al.)

Noisy measurements produce faster results    [PDF]

Carlos Alexandre Brasil, Leonardo Andreta de Castro, Reginaldo de Jesus Napolitano
We consider the problem of a finite-time measurement using the Lindblad equation to find analytical results, valid for weak system-environment coupling, obtained for a two-level system in contact with a measurer (Markovian interaction) and a thermal bath (non-Markovian interaction). Analysing the behavior of the coherences we obtained an expression for the maximal duration of the measurement which coincides with the case of no system-environment interaction. The validity of the expression is confirmed by the behavior of the coherences in the case of strong system-environment coupling, found numerically, showing that the environmental noise contributes to a faster measurement.
View original: http://arxiv.org/abs/1109.4613

No comments:

Post a Comment