Author:
Teklu Berihu,Bina Matteo,Paris Matteo G. A.
Abstract
AbstractWe address propagation and entanglement of Gaussian states in optical media characterised by nontrivial spectral densities. In particular, we consider environments with a finite bandwidth $$J(\omega ) = J_0 \left[ \theta (\omega -\Omega ) - \theta (\omega - \Omega - \delta )\right] $$
J
(
ω
)
=
J
0
θ
(
ω
-
Ω
)
-
θ
(
ω
-
Ω
-
δ
)
, and show that in the low temperature regime $$T\ll \Omega ^{-1}$$
T
≪
Ω
-
1
: (i) secular terms in the master equation may be neglected; (ii) attenuation (damping) is strongly suppressed; (iii) the overall diffusion process may be described as a Gaussian noise channel with variance depending only on the bandwidth. We find several regimes where propagation is not much detrimental and entanglement may be protected form decoherence.
Funder
Khalifa University of Science, Technology and Research
Publisher
Springer Science and Business Media LLC
Reference58 articles.
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