A general framework of nondistortion quantum interrogation

Details A general framework of nondistortion quantum interrogation A general framework of nondistortion quantum interrogation

2002-03-22

arxiv.org/abs/quant-ph/0203114v3

Physics

Quantum Physics

10 pages, revtex, 2 figures

Scientific paper

We present a general framework to study nondistortion quantum interrogation which preserves the internal state of the quantum object being detected. We obtain the necessary and sufficient condition for successful performing nondistortion interrogation for unknown quantum object when the interaction between the probe system and the detected system takes place only once. When the probe system and interrogation process have been limited we develop a mathematical frame to determine whether it is possible to realize NQI processes only relying on the choice of the original probe state. We also consider NQI process in iterative cases. A sufficient criterion for NQI is obtained.

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