NCTS (South)


DATE2012-12-03

TIME12:10

PLACER49223, Second Physics Building , NCKU

FIELDQuantum Information Science

SPEAKER Prof. Ray-Kuang Lee(李瑞光) - 清華大學 光電工程研究所

TITLEInteracting qubits within Cavity-QED

ABSTRACTThe stability analysis of a generalized Dicke model, in the semi-classical limit, describing the interaction of an ensemble of interacting qubits driven by a quantized field is presented. The transitions from Rabi to Josephson dynamics are identified depending on the relative value of the involved parameters. Moreover, we reveal the existence of polariton soliton solutions in the array of weakly coupled cavity-qubits system. Bright solitons are found to be supported under perturbations only in the upper (optical) branch of polaritons, for which the corresponding group velocity is controlled by tuning the interacting strength.