Encoded Universality of Quantum Computations on the Multi-Atomic Ensembles in the QED Cavity

Details Encoded Universality of Quantum Computations on the Multi-Atomic Ensembles in the QED Cavity Encoded Universality of Quantum Computations on the Multi-Atomic Ensembles in the QED Cavity

2011-09-01

arxiv.org/abs/1109.0291v1

Physics

Quantum Physics

12 pages, 10 figures

Scientific paper

We propose an effective set of elementary quantum gates which provide an encoded universality and demonstrate the physical feasibility of these gates for the solid-state quantum computer based on the multi-atomic systems in the QED cavity. We use the two-qubit encoding and swapping-based operations to simplify a physical realization of universal quantum computing and add the immunity to a number of errors. This approach allows to implement any encoded single-qubit operation by three elementary gates and the encoded controlled- NOT operation can be performed in a single step. The considerable advantages are also shown for implementing some commonly used controlled gates.

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