Bound on trace distance based on super-fidelity

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Authors	MISZCZAK Jarosław PUCHALA Zbigniew
Year of publication	2009
Type	Article in Periodical
Magazine / Source	Physical Review A
MU Faculty or unit	Faculty of Informatics
Citation
Web	http://arxiv.org/abs/0811.2323
Field	Informatics
Keywords	Quantum information processing; trace distance; super-fidelity
Description	We provide a bound for the trace distance between two quantum states. The lower bound is based on the superfidelity, which provides the upper bound on quantum fidelity. One of the advantages of the presented bound is that it can be estimated using a simple measurement procedure. We also compare this bound with the one provided in terms of fidelity.
Related projects:	Highly Parallel and Distributed Computing Systems Quantum multipartite computation, communication and security