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Title: Direct characterization of quantum dynamics with noisy ancilla

Abstract

We present methods for the direct characterization of quantum dynamics (DCQD) in which both the principal and ancilla systems undergo noisy processes. Using a concatenated error detection code, we discriminate between located and unlocated errors on the principal system in what amounts to filtering of ancilla noise. The example of composite noise involving amplitude damping and depolarizing channels is used to demonstrate the method, while we find the rate of noise filtering is more generally dependent on code distance. Furthermore our results indicate the accuracy of quantum process characterization can be greatly improved while remaining within reach of current experimental capabilities.

Authors:
 [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1235832
Alternate Identifier(s):
OSTI ID: 1226862
Grant/Contract Number:  
AC05-00OR22725; AC0500OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 92; Journal Issue: 5; Journal ID: ISSN 1050-2947
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; quantum information; quantum computing; error correction; quantum physics

Citation Formats

Dumitrescu, Eugene F., and Humble, Travis S. Direct characterization of quantum dynamics with noisy ancilla. United States: N. p., 2015. Web. doi:10.1103/PhysRevA.92.052329.
Dumitrescu, Eugene F., & Humble, Travis S. Direct characterization of quantum dynamics with noisy ancilla. United States. https://doi.org/10.1103/PhysRevA.92.052329
Dumitrescu, Eugene F., and Humble, Travis S. 2015. "Direct characterization of quantum dynamics with noisy ancilla". United States. https://doi.org/10.1103/PhysRevA.92.052329. https://www.osti.gov/servlets/purl/1235832.
@article{osti_1235832,
title = {Direct characterization of quantum dynamics with noisy ancilla},
author = {Dumitrescu, Eugene F. and Humble, Travis S.},
abstractNote = {We present methods for the direct characterization of quantum dynamics (DCQD) in which both the principal and ancilla systems undergo noisy processes. Using a concatenated error detection code, we discriminate between located and unlocated errors on the principal system in what amounts to filtering of ancilla noise. The example of composite noise involving amplitude damping and depolarizing channels is used to demonstrate the method, while we find the rate of noise filtering is more generally dependent on code distance. Furthermore our results indicate the accuracy of quantum process characterization can be greatly improved while remaining within reach of current experimental capabilities.},
doi = {10.1103/PhysRevA.92.052329},
url = {https://www.osti.gov/biblio/1235832}, journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 92,
place = {United States},
year = {Mon Nov 23 00:00:00 EST 2015},
month = {Mon Nov 23 00:00:00 EST 2015}
}

Journal Article:

Citation Metrics:
Cited by: 5 works
Citation information provided by
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