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

TL;DR

This paper investigates the 'C60 spin-charging' effect in endohedral atoms and its implications for quantum computing, identifying high-spin atoms that may hinder quantum register operation.

Contribution

It introduces the concept of 'C60 spin-charging' and analyzes its impact on the suitability of various atoms for quantum register applications.

Findings

The 'C60 spin-charging' effect can influence spin manipulation in endohedral atoms.

High-spin atoms like Cr, Mn, Mo, Tc, and Eu are less suitable for quantum registers.

Certain atoms exhibit properties that could disrupt quantum computing operations.

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 $\rm 3d$ (Cr and Mn) and $\rm 4d$ (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.