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Replacing Quantum Feedback with Open-Loop Control and Quantum Filtering
- Publication Year :
- 2009
-
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.<br />5 pages, revtex4, 3 eps figures. Comments welcome. V2 minor corrections, published version.
- Subjects :
- Physics
Quantum Physics
Quantum decoherence
Mathematical sciences
Quantum filtering
Control (management)
Open-loop controller
FOS: Physical sciences
Feedback loop
Atomic and Molecular Physics, and Optics
Control theory
Optimization and Control (math.OC)
Quantum mechanics
FOS: Mathematics
Quantum information
Quantum Physics (quant-ph)
Mathematics - Optimization and Control
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....00e6842bf685d880bc3a947734bdbacb