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Optical Quantum Computation with Perpetually Coupled Spins

Simon C. Benjamin·Brendon W. Lovett·John H. Reina
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Abstract

The possibility of using strongly and continuously interacting spins for quantum computation has recently been discussed. Here we present a simple optical scheme that achieves this goal while avoiding the drawbacks of earlier proposals. We employ a third state, accessed by a classical laser field, to create an effective barrier to information transfer. The mechanism proves to be highly efficient both for continuous and pulsed laser modes; moreover it is very robust, tolerating high decay rates for the excited states. The approach is applicable to a broad range of systems, in particular dense structures such as solid state self-assembled (e.g., molecular) devices. Importantly, there are existing structures upon which `first step' experiments could be immediately performed.

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Simon C. Benjamin, Brendon W. Lovett, John H. Reina. 2005-01-19. Optical Quantum Computation with Perpetually Coupled Spins. https://doi.org/10.1103/physreva.70.060305

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