Crossovers between Time-Bin and Energy-Time Entanglement in Homodyned Resonance Fluorescence
Year: 2026
Type: preprint
Abstract: We theoretically investigate photonic entanglement generated by homodyning resonance fluorescence from a two-level emitter with a phase-locked laser field. Under weak excitation, increasing the relative laser-field amplitude produces crossovers from time-bin to energy--time and back to time-bin entanglement. The intermediate energy--time regime occurs near amplitude matching, where destructive interference suppresses the single-photon component, allowing the two-photon contributions to dominate the coincidence signal. We evaluate the resulting photon statistics and first-order coherence and characterize the entanglement through violations of the CHSH Bell inequality in a Franson interferometer. This scheme provides a route to controlling photonic entanglement through linear optics and coherent interference.
Source: arXiv (Cornell University)
Authors: Zeng, Zi-Qi, Wang, Jian, Wu, Bang, Yuan, Zhiliang
Institution: Beijing Academy of Quantum Information Sciences
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7222644409