Deterministic creation and stabilization of entanglement in circuit QED by homodyne-mediated feedback control

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.032335· OSTI ID:21448673

Zhuo, Liu; Luelin, Kuang; Kai, Hu; Luting, Xu; Suhua, Wei; Lingzhen, Guo; Xinqi, Li ^[1]

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1. Department of Physics, Beijing Normal University, Beijing 100875 (China)

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.

• OSTI ID: 21448673
• Journal Information: Physical Review. A, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevA.82.032335; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONTROL
ELECTRIC CURRENTS
FEEDBACK
MARKOV PROCESS
QUANTUM ELECTRODYNAMICS
QUANTUM ENTANGLEMENT
QUANTUM STATES
QUBITS
SOLIDS
STABILIZATION
CURRENTS
ELECTRODYNAMICS
FIELD THEORIES
INFORMATION
QUANTUM FIELD THEORY
QUANTUM INFORMATION
STOCHASTIC PROCESSES