Protected Rabi oscillation induced by natural interactions among physical qubits

Details Protected Rabi oscillation induced by natural interactions among physical qubits Protected Rabi oscillation induced by natural interactions among physical qubits

2007-08-24

arxiv.org/abs/0708.3304v2

Phys. Rev. A 78, 012302 (2008)

Physics

Quantum Physics

In this revised manuscript, new sections V, VI, VII and new appendices A, B, C have been added to give detailed discussions. 1

Scientific paper

10.1103/PhysRevA.78.012302

For a system composed of nine qubits, we show that natural interactions among the qubits induce the time evolution that can be regarded, at discrete times, as the Rabi oscillation of a logical qubit. Neither fine tuning of the parameters nor switching of the interactions is necessary. Although straightforward application of quantum error correction fails, we propose a protocol by which the logical Rabi oscillation is protected against all single-qubit errors. The present method thus opens a simple and realistic way of protecting the unitary time evolution against noise.

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