Past Events

Abstract:

Quantum computers have attracted much attention in the past decade, as they may accomplish certain tough tasks that can hardly be fulfilled by their classical counterparts. However, decoherence always occurs in real quantum systems and therefore stands in the way of physical implementation of quantum computers. In this talk, various schemes are presented to suppress decoherence effect in real system involving superconducting devices. The quantum information is stored in superconducting charge qubit. Individual qubit control is achieved via external control by the applied gate voltage as well as magnetic flux pierced through the qubit loop. Interaction among qubits are mediated by a microwave cavity through magnetic qubit-field coupling. With the help of the external magnetic flux, we present the effective switch method of the qubit-field coupling. Therefore, the cavity assisted interaction can be implemented among selective qubits. Together with the possibility of many-qubit setup, this cavity assisted scenario of implementing quantum computation via superconducting qubit is quite promising.