Entanglement production by quantum error correction in the presence of correlated environment
Quantum Physics
2015-06-26 v2 Condensed Matter
Abstract
We analyze the effect of a quantum error correcting code on the entanglement of encoded logical qubits in the presence of a dephasing interaction with a correlated environment. Such correlated reservoir introduces entanglement between physical qubits. We show that for short times the quantum error correction interprets such entanglement as errors and suppresses it. However for longer time, although quantum error correction is no longer able to correct errors, it enhances the rate of entanglement production due to the interaction with the environment.
Cite
@article{arxiv.quant-ph/0310173,
title = {Entanglement production by quantum error correction in the presence of correlated environment},
author = {G. De Chiara and R. Fazio and C. Macchiavello and G. M. Palma},
journal= {arXiv preprint arXiv:quant-ph/0310173},
year = {2015}
}
Comments
7 pages, 3 figures, published version