Dissipative dynamics of spins in quantum dots

TL;DR

This paper develops a theoretical framework for understanding how electronic spins in quantum dots dissipate energy through interactions with lattice phonons, identifying key energy scales that influence dissipation regimes.

Contribution

It introduces a novel theory linking spin dissipation, electron confinement, and phonon interactions in quantum dots, highlighting an energy scale that determines dissipative behavior.

Findings

Identification of an energy scale governing dissipation regimes

Derivation of a relation between spin bath and electron-phonon interaction

Insight into spin relaxation mechanisms in quantum dots

Abstract

We present a theory for the dissipation of electronic spins trapped in quantum dots due to their coupling to the host lattice acoustic phonon modes. Based on the theory of dissipative two level systems for the spin dynamics, we derive a relation between the spin dissipative bath, the electron confinement, and the electron-phonon interaction. We find that there is an energy scale, typically smaller than the electronic lateral confinement energy, which sets the boundary between different dissipative regimes .