Crossovers between Time-Bin and Energy-Time Entanglement in Homodyned Resonance Fluorescence
The study investigates how changing the relative strength of a laser field affects entanglement in light generated by a two-level emitter using homodyning resonance fluorescence. Increasing the laser amplitude causes transitions between different types of entanglement, specifically from time-bin to energy–time and back to time-bin entanglement. This demonstrates a controllable method for engineering photonic quantum states using simple linear optics.