Conditional Phase Shift for Quantum CCNOT Operation

Details Conditional Phase Shift for Quantum CCNOT Operation Conditional Phase Shift for Quantum CCNOT Operation

2011-02-11

arxiv.org/abs/1102.2323v1

Physics

Quantum Physics

10 pages, 3 figures, 1 conference, 1 scientific school

Scientific paper

We suggest the improvement of description methods for quantum phase gate implementation in the cavity of QED configuration. Qubits are encoded into two lowest Fock state. Three qubit phase transformation is resulted from the interaction between Rydberg atom and three modes of cavity electromagnetic field. Evolution of conditional field states appearing after atom measurement is described by Kraus transformers. One of these operators is very convenient for phase gate implementation. We show that it corresponds to conditional evolution without quantum jumps. Also we describe cavity based generating EPR pair from certain initially disentangled state.

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