Title :
Quantum feedback control of coherent oscillations in a solid-state qubit
Author :
Ruskov, Rusko ; Zhang, Que ; Korotkov, Alexander N.
Author_Institution :
Dept. of Electr. Eng., California Univ., Riverside, CA, USA
Abstract :
The performance of a quantum feedback loop designed to maintain a desired phase of quantum coherent oscillations in a single solid-state qubit is analyzed using the quantum Bayesian formalism. The degree of oscillations synchronization with classical reference signal is calculated as a function of feedback strength, taking also into account finite detector bandwidth, dephasing due to environment, and qubit energy asymmetry.
Keywords :
Bayes methods; feedback; oscillations; quantum computing; synchronisation; classical reference signal; coherent oscillations; feedback strength; finite detector bandwidth; quantum Bayesian formalism; quantum feedback control; qubit energy asymmetry; solid state qubit; synchronization; Bayesian methods; Eigenvalues and eigenfunctions; Feedback control; Feedback loop; Measurement standards; Optical feedback; Performance analysis; Quantum computing; Quantum mechanics; Solid state circuits;
Conference_Titel :
Decision and Control, 2003. Proceedings. 42nd IEEE Conference on
Print_ISBN :
0-7803-7924-1
DOI :
10.1109/CDC.2003.1271806
