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arXiv · 1311.5530

Entanglement genesis by ancilla-based parity measurement in 2D circuit QED

O. -P. Saira·J. P. Groen·J. Cramer·M. Meretska·G. de Lange·L. DiCarlo
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Abstract

We present an indirect two-qubit parity meter in planar circuit quantum electrodynamics, realized by discrete interaction with an ancilla and a subsequent projective ancilla measurement with a dedicated, dispersively coupled resonator. Quantum process tomography and successful entanglement by measurement demonstrate that the meter is intrinsically quantum non-demolition. Separate interaction and measurement steps allow commencing subsequent data qubit operations in parallel with ancilla measurement, offering time savings over continuous schemes.

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O. -P. Saira, J. P. Groen, J. Cramer, M. Meretska, G. de Lange, L. DiCarlo. 2013-11-21. Entanglement genesis by ancilla-based parity measurement in 2D circuit QED. https://doi.org/10.1103/physrevlett.112.070502

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