Continuous quantum error correction via quantum feedback control

Ahn, Charlene, Doherty, Andrew C. and Landahl, Andrew J. (2002) Continuous quantum error correction via quantum feedback control. Physical Review A, 65 4: 042301-1-042301-10. doi:10.1103/PhysRevA.65.042301

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ109926_OA.pdf Full text (open access) application/pdf 258.54KB 3

Author Ahn, Charlene
Doherty, Andrew C.
Landahl, Andrew J.
Title Continuous quantum error correction via quantum feedback control
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2002-04
Year available 2002
Sub-type Article (original research)
DOI 10.1103/PhysRevA.65.042301
Open Access Status File (Publisher version)
Volume 65
Issue 4
Start page 042301-1
End page 042301-10
Total pages 10
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We describe a protocol for continuously protecting unknown quantum states from decoherence that incorporates design principles from both quantum error correction and quantum feedback control. Our protocol uses continuous measurements and Hamiltonian operations, which are weaker control tools than are typically assumed for quantum error correction. We develop a cost function appropriate for unknown quantum states and use it to optimize our state-estimate feedback. Using Monte Carlo simulations, we study our protocol for the three-qubit bit-flip code in detail and demonstrate that it can improve the fidelity of quantum states beyond what is achievable using quantum error correction when the time between quantum error-correction cycles is limited.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Systems
State
Decoherence
Codes
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 104 times in Thomson Reuters Web of Science Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 19 Sep 2007, 15:50:25 EST