Rapid Measurement of Quantum Systems using Feedback Control
Quantum Physics
2009-08-15 v2 Optimization and Control
Abstract
We introduce a feedback control algorithm that increases the speed at which a measurement extracts information about a -dimensional system by a factor that scales as . Generalizing this algorithm, we apply it to a register of qubits and show an improvement O(n). We derive analytical bounds on the benefit provided by the feedback and perform simulations that confirm that this speedup is achieved.
Cite
@article{arxiv.0712.3620,
title = {Rapid Measurement of Quantum Systems using Feedback Control},
author = {Joshua Combes and Howard M. Wiseman and Kurt Jacobs},
journal= {arXiv preprint arXiv:0712.3620},
year = {2009}
}
Comments
4 pages, 4 figures. V2: Minor corrections