Optical quantum computation with perpetually coupled spins

Simon C Benjamin, Brendon W Lovett, John H Reina

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


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.

Original languageEnglish
Article number060305
Number of pages4
JournalPhysical Review A
Issue number6
Publication statusPublished - Dec 2004


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