2009/02/28 by Bertrand Georgeot, B. Georgeot, Frédéric Mila +1 · 45 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Chiral symmetry #Chirality (physics) #Cluster (spacecraft) #Condensed matter physics #Magnetism in coordination complexes #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum decoherence #Quantum mechanics #Qubit #Spin (aerodynamics) #cond-mat.mes-hall #cond-mat.str-el #quant-ph
paper · pdf · doi:10.1103/physrevlett.104.200502
published in Physical Review Letters 104(20), 200502 (American Physical Society) · 5 pages, 3 figures, discussion on decoherence added
arxiv created 2010/04/02 · openalex publication_date 2010/05/19 · arxiv updated 2010/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 with 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.