Deterministic creation and stabilization of entanglement in circuit QED by homodyne-mediated feedback control
Zhuo Liu, Lülin Kuang, Kai Hu, Luting Xu, Suhua Wei, Lingzhen Guo, Xinqi Li · Physical Review A · 2010
In a solid-state circuit QED system, we demonstrate that a homodyne-current-based feedback can create and stabilize highly entangled two-qubit states in the presence of a moderate noisy environment. Particularly, we present an extended analysis for the current-based Markovian feedback, which leads to an improved feedback scheme. We show that this is essential to achieve a desirable control effect by the use of dispersive measurement.