Coherent-Classical Estimation for Linear Quantum Systems
Shibdas Roy; Ian R. Petersen; Elanor H. Huntington · 2015 · arXiv
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Abstract (excerpt)
We study a coherent-classical estimation scheme for a class of linear quantum systems, where the estimator is a mixed quantum-classical system that may or may not involve coherent feedback. We show that when the quantum plant or the quantum part of the estimator (coherent controller) is an annihilation operator only system, coherent-classical estimation without coherent feedback can provide no improvement over purely-classical estimation. Otherwise, coherent-classical estimation without feedback can be better than classical-only estimation for certain homodyne detector angles, although the for
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Metadata source: arXiv