Complete positivity and entangled degrees of freedom

F. Benatti, R. Floreanini, R. Romano

Published 2002-05-02Version 1

We study how some recently proposed noncontextuality tests based on quantum interferometry are affected if the test particles propagate as open systems in presence of a gaussian stochastic background. We show that physical consistency requires the resulting markovian dissipative time-evolution to be completely positive.