Entanglement versus relaxation and decoherence in a quantum algorithm for quantum chaos
量子物理
2009-11-10 v2 凝聚态物理
混沌动力学
摘要
We study analytically and numerically the behavior of quantum entanglement in a quantum computer operating an efficient algorithm for quantum chaos. Our results show that in an ideal algorithm the entanglement decays exponentially with the diffusive relaxation rate induced by classical chaos. This decay goes down to a residual level which drops exponentially with the number of qubits n_q. Decoherence destroys the residual entanglement with a rate exponential in n_q.
引用
@article{arxiv.quant-ph/0301086,
title = {Entanglement versus relaxation and decoherence in a quantum algorithm for quantum chaos},
author = {S. Bettelli and D. L. Shepelyansky},
journal= {arXiv preprint arXiv:quant-ph/0301086},
year = {2009}
}
备注
research at Quantware MIPS Center http://www.quantware.ups-tlse.fr, revtex, 5 pages, 5 figures, accepted for publication on PRA