Coherence trapping and information back-flow in dephasing qubits
Quantum Physics
2014-02-24 v3
Abstract
We study the interplay between coherence trapping, information back-flow and the form of the reservoir spectral density for dephasing qubits. We show that stationary coherence is maximized when the qubit undergoes non-Markovian dynamics, and we elucidate the different roles played by the low and high frequency parts of the environmental spectrum. We show that the low frequencies fully determine the presence or absence of information back-flow while the high frequencies dictate the maximal amount of coherence trapping.
Keywords
Cite
@article{arxiv.1311.0699,
title = {Coherence trapping and information back-flow in dephasing qubits},
author = {Carole Addis and Gregoire Brebner and Pinja Haikka and Sabrina Maniscalco},
journal= {arXiv preprint arXiv:1311.0699},
year = {2014}
}
Comments
4 pages, 3 figures. New references have been added to the introduction. Also including minor modifications