Professor Artur Ekert FRS

Abstract:

A scheme for implementing quantum logic operations within a cavity of QED configuration is presented. This scheme is particularly suitable for the direct implementation of some useful many-qubit quantum gates. From a general point of view, the scheme is analogous to the linear ion trap scheme, except that the high-Q cavities play the role of the ions, and the atoms play the role of the quantum bus.

Abstract:

We propose a scheme for quantum computing using high-Q cavities in which the qubits are represented by single cavity modes restricted in the space spanned by the two lowest Fock states. We show that single qubit operations and universal multiple qubit gates can be implemented using atoms sequentially crossing the cavities.