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24 March 2008 Control of two qubit systems with Hamiltonian feedback
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In this paper, we consider the control of two qubit systems in the presence of a weak measurement. In particular we consider how Hamiltonian feedback can be applied to two qubit systems, both in the case where only one qubit is measured, and in the case where a joint measurement is made of both qubits. We consider how the rate of entanglement can be increased by using a joint measurement and feedback, and also how information can be gathered about one qubit by measuring the other.
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Charles Hill, David Goodwin, and Jason Ralph "Control of two qubit systems with Hamiltonian feedback", Proc. SPIE 6976, Quantum Information and Computation VI, 69760C (24 March 2008);

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