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Title: Replacing quantum feedback with open-loop control and quantum filtering

Abstract

Feedback control protocols can stabilize and enhance the operation of quantum devices, however, unavoidable delays in the feedback loop adversely affect their performance. We introduce a quantum control methodology, combining open-loop control with quantum filtering, which is not constrained by feedback delays. For the problems studied (rapid purification and rapid measurement) we analytically derive lower bounds on the control performance that are comparable with the best corresponding bounds for feedback protocols.

Authors:
; ;  [1]
  1. Centre for Quantum Computer Technology, Centre for Quantum Dynamics, Griffith University, Nathan 4111 (Australia)
Publication Date:
OSTI Identifier:
21408160
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 81; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.81.020301; (c) 2010 The American Physical Society; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; EQUIPMENT; FEEDBACK; OPEN-LOOP CONTROL; OPERATION; PERFORMANCE; PURIFICATION; CONTROL

Citation Formats

Combes, Joshua, Wiseman, Howard M, and Scott, A J. Replacing quantum feedback with open-loop control and quantum filtering. United States: N. p., 2010. Web. doi:10.1103/PHYSREVA.81.020301.
Combes, Joshua, Wiseman, Howard M, & Scott, A J. Replacing quantum feedback with open-loop control and quantum filtering. United States. https://doi.org/10.1103/PHYSREVA.81.020301
Combes, Joshua, Wiseman, Howard M, and Scott, A J. 2010. "Replacing quantum feedback with open-loop control and quantum filtering". United States. https://doi.org/10.1103/PHYSREVA.81.020301.
@article{osti_21408160,
title = {Replacing quantum feedback with open-loop control and quantum filtering},
author = {Combes, Joshua and Wiseman, Howard M and Scott, A J},
abstractNote = {Feedback control protocols can stabilize and enhance the operation of quantum devices, however, unavoidable delays in the feedback loop adversely affect their performance. We introduce a quantum control methodology, combining open-loop control with quantum filtering, which is not constrained by feedback delays. For the problems studied (rapid purification and rapid measurement) we analytically derive lower bounds on the control performance that are comparable with the best corresponding bounds for feedback protocols.},
doi = {10.1103/PHYSREVA.81.020301},
url = {https://www.osti.gov/biblio/21408160}, journal = {Physical Review. A},
issn = {1050-2947},
number = 2,
volume = 81,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 2010},
month = {Mon Feb 15 00:00:00 EST 2010}
}