Chirality of triangular antiferromagnetic clusters as a qubit

Abstract

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.

5 pages, 3 figures, discussion on decoherence added

References in corpus (4)

• Will spin-relaxation times in molecular magnets permit quantum information processing?
• Spin Chirality in a Molecular Dysprosium Triangle: the Archetype of the Non-Collinear Ising Model
• Spin-Electric Coupling in Molecular Magnets
• Electronic Orbital Currents and Polarization in Mott Insulators

Cited by in corpus (13)

• Magnetic Cluster Excitations
• Electrically-protected resonant exchange qubits in triple quantum dots
• Synthesis of antisymmetric spin exchange interaction and entanglement generation with chiral spin states in a superconducting circuit
• Hyperfine-Induced Decay in Triple Quantum Dots
• Macroscopic quantum dynamics of toroidal moment in Ising-type rare-earth clusters
• Magnetization and spin dynamics of the spin S=1/2 hourglass nanomagnet Cu5(OH)2(NIPA)4*10H2O
• Quantum circuits based on coded qubits encoded in chirality of electron spin complexes in triple quantum dots
• Read-out and Dynamics of the Qubit Built on Three Quantum Dots
• Localized states on triangular traps and low-temperature properties of the antiferromagnetic Heisenberg and repulsive Hubbard models
• A Multiferroic Molecular Magnetic Qubit
• Observation of spin-electric transitions in a molecular exchange qubit
• Finite-temperature decoherence of spin states in a $\text{{}{\text{Cu}}_3\text{}}$ single molecular magnet
• Polarization dependence of spin-electric transitions in molecular exchange qubits