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

doi:10.1103/PhysRevLett.112.070502

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 journal › Article › Academic › peer-review

51 Citations (Scopus)

32 Downloads (Pure)

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 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 language	English
Article number	070502
Number of pages	5
Journal	Physical review letters
Volume	112
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.112.070502
Publication status	Published - 20 Feb 2014
Externally published	Yes

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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 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.",

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AU - de Lange, G.

AU - DiCarlo, L.

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AB - 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.

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

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