Will spin-relaxation times in molecular magnets permit quantum information processing?

Details Will spin-relaxation times in molecular magnets permit quantum information processing? Will spin-relaxation times in molecular magnets permit quantum information processing?

2006-09-19

arxiv.org/abs/quant-ph/0609143v5

Physics

Quantum Physics

4 pages, 3 figures, in press at Physical Review Letters

Scientific paper

10.1103/PhysRevLett.98.057201

Using X-band pulsed electron spin resonance, we report the intrinsic spin-lattice ($T_1$) and phase coherence ($T_2$) relaxation times in molecular nanomagnets for the first time. In Cr$_7M$ 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 $T_2$ reaches 3 $\mu$s 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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