Dephasing of qubits by the Schr\"odinger cat
Quantum Physics
2015-05-13 v1
Abstract
We study the dephasing of a single qubit coupled to a bosonic bath. In particular, we investigate the case when the bath is initially prepared in a pure state known as the Schr\"odinger cat. In clear contradistinction to the time-evolution of an initial coherent state, the time evolutions of the purity and the coherence factor now depend on the particular choice of the Schr\"odinger cat state. We also demonstrate that the evolution of the entanglement of a two--qubit system depends on the initial conditions in a similar way.
Keywords
Cite
@article{arxiv.0905.2569,
title = {Dephasing of qubits by the Schr\"odinger cat},
author = {J. Dajka and M. Mierzejewski and J. Luczka and P. Hanggi},
journal= {arXiv preprint arXiv:0905.2569},
year = {2015}
}
Comments
Physica E (accepted)