Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems

Details Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems

2010-09-11

arxiv.org/abs/1009.2159v1

Phys. Rev. A 82, 012336 (2010)

Physics

Quantum Physics

Scientific paper

We study the quantum-jump-based feedback control on the entanglement shared between two qubits with one of them subject to decoherence, while the other qubit is under the control. This situation is very relevant to a quantum system consisting of nuclear and electron spins in solid states. The possibility to prolong the coherence time of the dissipative qubit is also explored. Numerical simulations show that the quantum-jump-based feedback control can improve the entanglement between the qubits and prolong the coherence time for the qubit subject directly to decoherence.

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