Decoherence induced by zero-point fluctuations in quantum Brownian motion

FERNANDO C. LOMBARDO & PAULA I. VILLAR

PHYSICS LETTERS A

Elsevier Science

Lugar: North-Holland, Amsterdam, Holanda; Año: 2005 vol. 336 p. 16 - 24

0375-9601

We show a completely analytical approach to the decoherence induced by a zero temperature environment on a Browniantest particle. We consider an Ohmic environment bilinearly coupled to an oscillator and compute the master equation. From  diffusive coefficients, we evaluate the decoherence time for the usual quantum Brownian motion and also for an upside-downoscillator, as a toy model of a quantum phase transition.