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

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)
6 Downloads (Pure)


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 nondemolition. Separate interaction and measurement steps allow the execution of subsequent data-qubit operations in parallel with ancilla measurement, offering time savings over continuous schemes.

Original languageEnglish
Article number070502
Number of pages5
JournalPhysical review letters
Issue number7
Publication statusPublished - 20 Feb 2014
Externally publishedYes

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