`C${}_{60}$ spin-charging' with an eye on a quantum computer

Abstract

A question whether there exists an interaction between the spins of the endohedral atom $A$@C${}_{60}$ and the properties of the confining shell which might affect the alignment of, or manipulation by, the spins for building a register for a quantum computer is discussed. It is argued that an effect, termed the `C${}_{60}$ spin-charging' effect, can occur in endohedral atoms and would affect the operation of a quantum register. The effect is exemplified by choosing the $3d$ (Cr and Mn) and $4d$ (Mo and Tc) transition metal atoms as well as a rare-earth Eu atom as the case study. A class of high-spin atoms which are less suitable for building a quantum register is, thus, identified.

5 pages, 1 figure, submitted to J. Phys. B: At. Mol. Opt. Phys