Decoherence of quantum gates based on Aharonov-Anandan phases in a multistep scheme
Quantum Physics
2015-06-16 v1
Abstract
We study quantum decoherence of single-qubit and two-qubit Aharonov-Anandan (AA) geometric phase gates realized in a multistep scheme. Each AA gate is also compared with the dynamical phase gate performing the same unitary transformation within the same time period and coupled with the same environment, which is modeled as harmonic oscillators. It is found that the fidelities and the entanglement protection of the AA phase gates are enhanced by the states being superpositions of different eigenstates of the environmental coupling, and the noncommutativity between the qubit interaction and the environmental coupling.
Keywords
Cite
@article{arxiv.1308.2758,
title = {Decoherence of quantum gates based on Aharonov-Anandan phases in a multistep scheme},
author = {Xin Li and Yu Shi},
journal= {arXiv preprint arXiv:1308.2758},
year = {2015}
}
Comments
7 pages, published in EPL