Abstract
In this talk, I will present an explicit scheme to fully recover a multiple-qubit state subject to a phase damping noise. We establish the theoretical framework and the operational procedure to restore an unknown initial quantum state for an N-qubit model interacting with either individual baths or a common bath. We give an explicit construction of the random unitary (RU) Kraus decomposition for an N-qubit model interacting with a common bath. We also demonstrate how to use only one unitary reversal operation to restore an arbitrary state with phase damping noise. In principle, the initial state can always be recovered with a success probability of 1. Interestingly, we found that non-RU decomposition can also be used to restore some particular entangled states. This may open a new path to restore a quantum state beyond the standard RU scheme.
© 2013 Optical Society of America
PDF ArticleMore Like This
Ting Yu
T5A.2 Conference on Coherence and Quantum Optics (CQO) 2013
Franck Ferreyrol, Timothy C. Ralph, and Geoff J. Pryde
IB_6_5 International Quantum Electronics Conference (IQEC) 2013
D. D. Bhaktavatsala Rao, Jens Clausen, Goren Gordon, and Gershon Kurizki
QTuC1 International Conference on Quantum Information (QIM) 2011