Rapid State-Reduction of Quantum Systems Using Feedback Control
量子物理
2009-08-15 v3
摘要
We consider using Hamiltonian feedback control to increase the speed at which a continuous measurement purifies (reduces) the state of a quantum system, and thus to increase the speed of the preparation of pure states. For a measurement of an observable with N equispaced eigenvalues, we show that there exists a feedback algorithm which will speed up the rate of state-reduction by at least a factor of 2(N+1)/3.
引用
@article{arxiv.quant-ph/0508007,
title = {Rapid State-Reduction of Quantum Systems Using Feedback Control},
author = {Joshua Combes and Kurt Jacobs},
journal= {arXiv preprint arXiv:quant-ph/0508007},
year = {2009}
}
备注
4 pages, revtex4, 1 eps figure. v2: improved presentation; v3: published version, some typos corrected