Performance comparison between classical and quantum control for a simple quantum system
Abstract
Brańczyk et al. pointed out that the quantum control scheme is superior to the classical control scheme for a simple quantum system using simulation [A.M. Brańczyk, P.E.M.F. Mendonca, A. Gilchrist, A.C. Doherty, S.D. Barlett, Quantum control theory of a single qubit, Physical Review A 75 (2007) 012329 or arXiv eprint quantph/0608037]. Here we rigorously prove the result. Furthermore we will show that any quantum operation does not universally “correct” the dephasing noise.
 Publication:

Physica A Statistical Mechanics and its Applications
 Pub Date:
 February 2008
 DOI:
 10.1016/j.physa.2007.10.019
 Bibcode:
 2008PhyA..387.1056X