Abstract
We study a hybrid quantum open system consisting of two interacting subsystems formed by one two-level atom (qubit) and one three-level atom (qutrit). The quantum open system is coupled to an external environment (cavity) via the qubit-cavity interaction. It is found that the feedback control on different parts of the system (qubit or qutrit) gives dramatically different asymptotical behaviors of the open system dynamics. We show that the local feedback control mechanism acting on the qutrit subsystem is superior than that on the qubit in the sense of improving the entanglement. Particularly, the qutrit-control scheme may result in an entangled steady state, depending on the initial state.
Original language | English |
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Pages (from-to) | 597-614 |
Number of pages | 18 |
Journal | Quantum Information and Computation |
Volume | 16 |
Issue number | 7-8 |
State | Published - 1 May 2016 |
Keywords
- Entanglement
- Quantum feedback control