Chirality of triangular antiferromagnetic clusters as a qubit

Details Chirality of triangular antiferromagnetic clusters as a qubit Chirality of triangular antiferromagnetic clusters as a qubit

2009-02-26

arxiv.org/abs/0902.4652v2

Phys. Rev. Lett. 104, 200502 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures, discussion on decoherence added

Scientific paper

10.1103/PhysRevLett.104.200502

We show that the chirality of triangular antiferromagnetic clusters can be used as a qubit even if it is entirely decoupled from the total spin of the cluster. In particular, we estimate the orbital moment associated to the chirality, and we show that it can be large enough to allow a direct measurement of the chirality with a field perpendicular to the cluster. Consequences for molecular magnets are discussed, and an alternative implementation with Cu atoms on a surface is proposed, for which one- and two-qubit gates are worked out in detail. Decoherence effects are also discussed.

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