Studies of decoherence in strongly anisotropic spin triangles with toroidal or general non-collinear easy axes

Abstract

Magnetic molecules are investigated with respect to their usability as units in future quantum devices. In view of quantum computing, a necessary prerequisite is a long coherence time of superpositions of low-lying levels. In this article, we investigate by means of numerical simulations whether a toroidal structure of single-ion easy anisotropy axes is advantageous as often conjectured. Our results demonstrate that there is no general advantage of toroidal magnetic molecules, but that arrangements of tilted anisotropy axes perform best in many cases.

12 pages, 19 figures

References in corpus (10)

• Will spin-relaxation times in molecular magnets permit quantum information processing?
• Operating Quantum States in Single Magnetic Molecules: Implementation of Grover's Quantum Algorithm
• Decoherence in Crystals of Quantum Molecular Magnets
• Pair-wise decoherence in coupled spin qubit networks
• A perspective on scaling up quantum computation with molecular spins
• Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
• Quantum spin coherence in halogen-modified Cr${}_7$Ni molecular nanomagnets
• Toroidal magnetic molecules stripped to their basics
• Decoherence of a singlet-triplet superposition state under dipolar interactions of an uncorrelated environment
• Observation of phase synchronization and alignment during free induction decay of quantum spins with Heisenberg interactions