Peculiarities of Interaction of a Quantum Dot with Non-Classical Light in the Self-Phase Modulation Regime

TL;DR

This paper analytically investigates how self-phase modulation of quantum light affects the excitation and entanglement of a quantum dot, revealing resonance detuning effects, state formation, and dynamics modifications due to Kerr nonlinearity.

Contribution

It provides a detailed analytical study of the impact of Kerr-nonlinearity on quantum dot excitation and entanglement, highlighting the formation of non-Gaussian states and altered excitation dynamics.

Findings

Resonance detuning is specific to photon number states.

Self-phase modulation decreases excitation efficiency.

Entanglement between quantum dot and field increases with non-linearity.

Abstract

Influence of the self-phase modulation of quantum light on the induced resonant excitation of a semiconductor quantum dot is studied analytically in the case of the Kerr-nonlinearity of the medium. The phase nonlinearity is found to result actually in a resonance detuning specific for each field photon number state. This effect is shown to provide significant decrease of the excitation efficiency accompanied at the same time by more regular excitation dynamics obtained even for initial squeezed vacuum field state. The enhancement of entanglement between semiconductor and field subsystems with growing non-linearity is demonstrated. As a result, the formation of different types of non-Gaussian field states is found with features being analyzed in details.