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Parity Measurement in Ultrastrong Coupling Regime

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arxiv 1205.1884 v1 pith:7IWDKVWW submitted 2012-05-09 quant-ph

Parity Measurement in Ultrastrong Coupling Regime

classification quant-ph
keywords measurementparityapproximationcouplingquantumqubitsregimescheme
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The measurement of the parity of two qubits is a primitive of quantum computing that allows creating deterministic entanglement. In the field of circuit quantum electrodynamics, a scheme to achieve parity measurement of two superconducting qubits has been proposed and analyzed under the usual rotating-wave approximation (RWA). We show that the same scheme can be carried over beyond this approximation, to the regime of ultrastrong coupling, with an improvement in the fidelity.

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