Stabilization of collapse and revival dynamics by a non-Markovian phonon bath

TL;DR

This paper demonstrates that non-Markovian phonon baths can stabilize and enhance collapse and revival dynamics in quantum dot cavity QED systems, challenging the view of environment-induced dissipation as purely detrimental.

Contribution

It reveals that non-Markovian environmental coupling can be harnessed to improve quantum coherence and control in solid-state quantum systems, providing a new approach to quantum device engineering.

Findings

Non-Markovian phonon baths inhibit irregular oscillations.

Enhanced collapse and revival patterns observed.

Quantum dot dynamics deviate from atomic Jaynes-Cummings model.

Abstract

Semiconductor quantum dots (QDs) have been demonstrated to be versatile candidates to study the fundamentals of light-matter interaction [1-3]. In contrast with atom optics, dissipative processes are induced by the inherent coupling to the environment and are typically perceived as a major obstacle towards stable performances in experiments and applications [4]. In this paper we show that this is not necessarily the case. In fact, the memory of the environment can enhance coherent quantum optical effects. In particular, we demonstrate that the non-Markovian coupling to an incoherent phonon bath has a stabilizing effect on the coherent QD cavity-quantum electrodynamics (cQED) by inhibiting irregular oscillations and boosting regular collapse and revival patterns. For low photon numbers we predict QD dynamics that deviate dramatically from the well-known atomic Jaynes-Cummings model. Our proposal opens the way to a systematic and deliberate design of photon quantum effects via specifically engineered solid-state environments.