Quenched decoherence in qubit dynamics due to strong amplitude-damping noise
Quantum Physics
2014-03-11 v2
Abstract
We study non-perturbatively the time evolution of a qubit subject to amplitude-damping noise. We show that at strong coupling the qubit decoherence can be quenched owing to large environment feedbacks, such that the qubit can evolve coherently even in the long-time limit. As an application, we show that for a quantum channel that consists of two independent qubits subject to uncorrelated local amplitude-damping noises, it can maintain at strong coupling finite entanglement and better than classical teleportation fidelity at long times.
Cite
@article{arxiv.1310.6843,
title = {Quenched decoherence in qubit dynamics due to strong amplitude-damping noise},
author = {Shin-Tza Wu},
journal= {arXiv preprint arXiv:1310.6843},
year = {2014}
}