Dynamics in a system of four qubits in two cavities
Duong Hai Trieu · Journal of Physics Conference Series · 2009
We study the dynamics of a closed system of four qubits in two coupled cavities. Each cavity contains two qubits which interact with it's quantum field and photons which may hop between the cavities. The state of the system is first expressed in delocalized modes and then is expressed in the system of local bases. Exact general solutions are obtained for one-excitation state with arbitrary initial condition. We consider in detail two cases of large and small hopping at resonance. In the case of resonance and large hopping the state of the first qubit may also be transferred to the second qubit in the same cavity without excitation of the field. Such transfer of states minimizes decoherence due to photon loss.