Multiphoton resonances for all-optical quantum logic with multiple cavities

Everitt, Mark S and Garraway, Barry (2014) Multiphoton resonances for all-optical quantum logic with multiple cavities. Physical Review A (PRA), 90 (1). 012335. ISSN 1050-2947

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Abstract

We develop a theory for the interaction of multilevel atoms with multimode cavities yielding cavity-enhanced multiphoton resonances. The locations of the resonances are predicted from the use of effective two- and three-level Hamiltonians. As an application we show that quantum gates can be realized when photonic qubits are encoded on the cavity modes in arrangements where ancilla atoms transit the cavity. The fidelity of operations is increased by conditional measurements on the atom and by the use of a selected, dual-rail, Hilbert space. A universal set of gates is proposed, including the Fredkin gate and iSWAP operation; the system seems promising for scalability.

Item Type: Article
Keywords: Quantum optics Cavity QED
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Barry Garraway
Date Deposited: 05 Sep 2014 08:49
Last Modified: 07 Mar 2017 04:55
URI: http://sro.sussex.ac.uk/id/eprint/49713

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