Towards a unified approach to information-disturbance tradeoffs in quantum measurements

Details Towards a unified approach to information-disturbance tradeoffs in quantum measurements Towards a unified approach to information-disturbance tradeoffs in quantum measurements

2008-10-07

arxiv.org/abs/0810.1310v1

OSID 16, 29-48 (2009)

Physics

Quantum Physics

Scientific paper

10.1142/S1230161209000037

We show that the global balance of information dynamics for general quantum measurements given in [F. Buscemi, M. Hayashi, and M. Horodecki, Phys.Rev.Lett. 100, 210504 (2008)] makes it possible to unify various and generally inequivalent approaches adopted in order to derive information-disturbance tradeoffs in quantum theory. We focus in particular on those tradeoffs, constituting the vast majority of the literature on the subject, where disturbance is defined either in terms of average output fidelity or of entanglement fidelity.

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