Dynamics of Bloch vectors and the channel capacity of a non identical charged qubit pair

Details Dynamics of Bloch vectors and the channel capacity of a non identical charged qubit pair Dynamics of Bloch vectors and the channel capacity of a non identical charged qubit pair

2008-06-16

arxiv.org/abs/0806.2516v1

Physics Letters A, Volume 373, Issue 10, 2 March 2009, Pages 927-933

Physics

Quantum Physics

Scientific paper

10.1016/j.physleta.2009.01.017

We have considered a system of two superconducting charge qubits capacitively coupled to a microwave resonator. The dynamics of the Bloch vectors are investigated for different regimes. By means of the Bloch vectors and cross dyadic we quantify the degree of entanglement contained in the generated entangled state. We consider different values of the system parameters to discuss the dynamics of the channel capacity between the qubits. We show that there is an important role played by initial state settings, coupling constant and the mean photon number on generating entangled state with high degree of entanglement and high capacity.

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