Decoherence of the quantum logic gate implemented with the Jaynes-Cummings model: A semiclassical approach
Abstract
In this paper, we investigate decoherence of Knill, Laflamme, and Milburn's nonlinear sign-shift gate that is implemented with the Jaynes-Cummings model. Introducing a stochastic variable as an external electric field, we let it couple with a dipole moment of a two-level atom. We examine this model using a semiclassical theory. Results of the Monte Carlo simulations under the semiclassical approximation correspond well with those obtained with the quantum mechanical perturbation theory for the stochastic process. In the results of the simulations, we observe both the and decays. This paper is a sequel to the reference [H.~Azuma, Prog. Theor. Phys. {\bf 126}, 369 (2011)].
Keywords
Cite
@article{arxiv.1605.00219,
title = {Decoherence of the quantum logic gate implemented with the Jaynes-Cummings model: A semiclassical approach},
author = {Hiroo Azuma},
journal= {arXiv preprint arXiv:1605.00219},
year = {2017}
}
Comments
v1: 29 pages, 19 eps figures, latex2e; v2: 25 pages, 13 eps figures, vastly revised, the title is changed, Section 6 and Appendix B in the previous version are removed; v3: typographical errors corrected