Coherence/incoherence transition temperature in molecular spin

TL;DR

This paper investigates the factors influencing the coherence/incoherence transition temperature in molecular spins, highlighting how spin number, axiality, and non-axial components affect their potential as robust qubits or qudits.

Contribution

It identifies key parameters that optimize the transition temperature and enhances understanding of molecular spin stability for quantum computing applications.

Findings

Low spin number and low axiality favor higher transition temperatures.

High spin number and high axiality provide better protection from magnetic noise.

Large non-axial components can further improve transition temperature.

Abstract

We examine the coherence/incoherence transition temperature of a generic molecular spin. Our results demonstrates that a molecular spin with a high coherence/incoherence transition temperature should possess a low spin number and low axiality, or high spin number and high axiality. Interestingly, the latter is better protected from the magnetic noises than the former and thus be the best candidate for a robust electron-based molecular spin qubit/qudit. The transition temperature can be further optimized if a large non-axial component of the spin Hamiltonian exists.