Abstract
We 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(ω) = J[ θ(ω- Ω) - θ(ω- Ω - δ) ] , and show that in the low temperature regime 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.
Original language | British English |
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Article number | 11646 |
Journal | Scientific Reports |
Volume | 12 |
Issue number | 1 |
DOIs | |
State | Published - Dec 2022 |