Quantum feedback control of a solid-state qubit
介观与纳米尺度物理
2016-08-31 v1 量子物理
摘要
We have studied theoretically the basic operation of a quantum feedback loop designed to maintain a desired phase of quantum coherent oscillations in a single solid-state qubit. The degree of oscillations synchronization with external harmonic signal is calculated as a function of feedback strength, taking into account available bandwidth and coupling to environment. The feedback can efficiently suppress the dephasing of oscillations if the qubit coupling to the detector is stronger than coupling to environment.
引用
@article{arxiv.cond-mat/0204516,
title = {Quantum feedback control of a solid-state qubit},
author = {Rusko Ruskov and Alexander N. Korotkov},
journal= {arXiv preprint arXiv:cond-mat/0204516},
year = {2016}
}
备注
Extended version of cond-mat/0107280 (5 pages, 5 figures); to be published in PRB (RC)