Solid-State Spin-Photon Quantum Interface without Spin-Orbit Coupling

TL;DR

This paper demonstrates that coherent optical control of a single confined spin is achievable without relying on spin-orbit coupling, using reservoir-induced effects to maintain coherence.

Contribution

It introduces a method for spin manipulation that leverages reservoir-induced coherence, bypassing the need for spin-orbit coupling in solid-state systems.

Findings

Coherent spin control is possible without spin-orbit coupling.

Fermionic reservoir induces non-entangling coherent spin dynamics.

Analysis of time-scale dependent competition between coherent and dissipative effects.

Abstract

We show that coherent optical manipulation of a single confined spin is possible even in the absence of spin-orbit coupling. To this end, we consider the non-Markovian dynamics of a single valence orbital hole spin that has optically induced spin exchange coupling to a low temperature partially polarized electron gas. We show that the fermionic nature of the reservoir induces a coherent component to the hole spin dynamics that does not generate entanglement with the reservoir modes. We analyze in detail the competition of this reservoir-assisted coherent contribution with dissipative components displaying markedly different behavior at different time scales and determine the fidelity of optically controlled spin rotations.