Scalable two- and four-qubit parity measurement with a threshold photon counter

Luke C G Govia, Emily J. Pritchett, Britton Plourde, Maxim G. Vavilov, R. McDermott, Frank K. Wilhelm

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Parity measurement is a central tool for many quantum information processing tasks. In this work, we propose a method to directly measure two- and four-qubit parity with low overhead in hardware and software while remaining robust to experimental imperfections. Our scheme relies on dispersive qubit-cavity coupling and photon counting that is sensitive only to intensity; both ingredients are widely realized in many different quantum computing modalities. For a leading technology in quantum computing, superconducting integrated circuits, we analyze the measurement contrast and the back action of the scheme and show that this measurement comes close enough to an ideal parity measurement to be applicable to quantum error correction.

Original languageEnglish (US)
Article number022335
JournalPhysical Review A
Volume92
Issue number2
DOIs
StatePublished - Aug 14 2015

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parity
counters
thresholds
photons
quantum computation
ingredients
integrated circuits
counting
hardware
computer programs
cavities
defects

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Govia, L. C. G., Pritchett, E. J., Plourde, B., Vavilov, M. G., McDermott, R., & Wilhelm, F. K. (2015). Scalable two- and four-qubit parity measurement with a threshold photon counter. Physical Review A, 92(2), [022335]. https://doi.org/10.1103/PhysRevA.92.022335

Scalable two- and four-qubit parity measurement with a threshold photon counter. / Govia, Luke C G; Pritchett, Emily J.; Plourde, Britton; Vavilov, Maxim G.; McDermott, R.; Wilhelm, Frank K.

In: Physical Review A, Vol. 92, No. 2, 022335, 14.08.2015.

Research output: Contribution to journalArticle

Govia, LCG, Pritchett, EJ, Plourde, B, Vavilov, MG, McDermott, R & Wilhelm, FK 2015, 'Scalable two- and four-qubit parity measurement with a threshold photon counter', Physical Review A, vol. 92, no. 2, 022335. https://doi.org/10.1103/PhysRevA.92.022335
Govia, Luke C G ; Pritchett, Emily J. ; Plourde, Britton ; Vavilov, Maxim G. ; McDermott, R. ; Wilhelm, Frank K. / Scalable two- and four-qubit parity measurement with a threshold photon counter. In: Physical Review A. 2015 ; Vol. 92, No. 2.
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