Will spin-relaxation times in molecular magnets permit quantum information processing?
Arzhang Ardavan, Olivier Rival, John J. L. Morton, Stephen J. Blundell, Alexei M. Tyryshkin, Grigore A. Timco, Richard E. P. Winnpenny
Abstract
Using X-band pulsed electron spin resonance, we report the intrinsic spin-lattice (T1) and phase coherence (T2) relaxation times in molecular nanomagnets for the first time. In Cr7M heterometallic wheels, with M = Ni and Mn, phase coherence relaxation is dominated by the coupling of the electron spin to protons within the molecule. In deuterated samples T2 reaches 3 μs at low temperatures, which is several orders of magnitude longer than the duration of spin manipulations, satisfying a prerequisite for the deployment of molecular nanomagnets in quantum information applications.
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