Non-Markovian dynamics of single- and two-qubit systems interacting with Gaussian and non-Gaussian fluctuating transverse environments
Articolo
Data di Pubblicazione:
2016
Citazione:
Non-Markovian dynamics of single- and two-qubit systems interacting with Gaussian and non-Gaussian fluctuating transverse environments / M. Rossi, M. Paris. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - 144:2(2016 Jan 14). [10.1063/1.4939733]
Abstract:
We address the interaction of single- and two-qubit systems with an external transverse fluctuating
field and analyze in detail the dynamical decoherence induced by Gaussian noise and random
telegraph noise (RTN). Upon exploiting the exact RTN solution of the time-dependent von Neumann
equation, we analyze in detail the behavior of quantum correlations and prove the non-Markovianity
of the dynamical map in the full parameter range, i.e., for either fast or slow noise. The dynamics
induced by Gaussian noise is studied numerically and compared to the RTN solution, showing the
existence of (state dependent) regions of the parameter space where the two noises lead to very
similar dynamics. We show that the effects of RTN noise and of Gaussian noise are different, i.e.,
the spectrum alone is not enough to summarize the noise effects, but the dynamics under the effect
of one kind of noise may be simulated with high fidelity by the other one.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
M. Rossi, M. Paris
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