Discrimination of correlated and entangling quantum channels with selective process tomography

Dumitrescu, Eugene; Humble, Travis S.

doi:10.1103/PhysRevA.94.042107

Title: Discrimination of correlated and entangling quantum channels with selective process tomography

Journal Article · Mon Oct 10 00:00:00 EDT 2016 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.94.042107· OSTI ID:1329140

Dumitrescu, Eugene ^[1]; Humble, Travis S. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

The accurate and reliable characterization of quantum dynamical processes underlies efforts to validate quantum technologies, where discrimination between competing models of observed behaviors inform efforts to fabricate and operate qubit devices. We present a protocol for quantum channel discrimination that leverages advances in direct characterization of quantum dynamics (DCQD) codes. We demonstrate that DCQD codes enable selective process tomography to improve discrimination between entangling and correlated quantum dynamics. Numerical simulations show selective process tomography requires only a few measurement configurations to achieve a low false alarm rate and that the DCQD encoding improves the resilience of the protocol to hidden sources of noise. Lastly, our results show that selective process tomography with DCQD codes is useful for efficiently distinguishing sources of correlated crosstalk from uncorrelated noise in current and future experimental platforms.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725; AC0500OR22725

OSTI ID:: 1329140

Alternate ID(s):: OSTI ID: 1328593

Journal Information:: Physical Review A, Vol. 94, Issue 4; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Quantum process identification: a method for characterizing non-markovian quantum dynamics Bennink, Ryan S.; Lougovski, Pavel New Journal of Physics, Vol. 21, Issue 8 https://doi.org/10.1088/1367-2630/ab3598	journal	August 2019
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