Physics – Quantum Physics
Scientific paper
2007-09-26
Physics
Quantum Physics
Scientific paper
10.1103/PhysRevA.77.014305
In this paper we show how weak joint measurement and local feedback can be used to control entanglement generation between two qubits. To do this, we make use of a decoherence free subspace (DFS). Weak measurement and feedback can be used to drive the system into this subspace rapidly. Once within the subspace, feedback can generate entanglement rapidly, or turn off entanglement generation dynamically. We also consider, in the context of weak measurement, some of differences between purification and generating entanglement.
Hill Charles D.
Ralph Jason F.
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