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Sudden death and sudden birth of quantumness for a harmonic oscillator interacting with a classical fluctuating environment | | Jacopo Trapani
; Matteo Bina
; Sabrina Maniscalco
; Matteo G.A. Paris
; | | Date: |
4 Nov 2014 | | Abstract: | We address the dynamics of nonclassicality for a quantum system interacting
with a noisy fluctuating environment described by a classical stochastic field.
As a paradigmatic example, we consider a harmonic oscillator initially prepared
in a maximally nonclassical state, e.g. a Fock number state or a Schroedinger
cat-like state, and then coupled to either resonant or non-resonant external
field. Stochastic modeling allows us to describe the decoherence dynamics
without resorting to approximated quantum master equations, and to introduce
non- Markovian effects in a controlled way. A detailed comparison among
different nonclassicality criteria and a thorough analysis of the decoherence
time reveal a rich phenomenology whose main features may be summarized as
follows: i) classical memory effects increase the survival time of quantum
coherence; ii) a detuning between the natural frequency of the system and the
central frequency of the classical field induces revivals of quantum coherence. | | Source: | arXiv, 1411.0946 | | Services: | Forum | Review | PDF | Favorites | |
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