Optical Quantum Computation with Perpetually Coupled Spins

Details Optical Quantum Computation with Perpetually Coupled Spins Optical Quantum Computation with Perpetually Coupled Spins

2004-07-08

arxiv.org/abs/quant-ph/0407063v2

Phys. Rev. A v.70 060305(R) [2004]

Physics

Quantum Physics

5 pages including 3 figures. Updated to published version

Scientific paper

10.1103/PhysRevA.70.060305

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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