Photon statistics and entanglement from two interacting quantum emitter

PhD Program

Speaker

Adrián Juan Delgado

When

2025/07/28
11:30

Place

CFM Auditorium (Donostia / San Sebastían)

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PhD Thesis defense by Adrián Juan Delgado

Supervisors: Rubén Esteban  (CFM, DIPC Associate Researcher) & Javier Aizpurua (DIPC, Ikerbasque Research Professor) 

Theory of Nanophotonics

This theoretical thesis aims to develop a deeper fundamental understanding of light emission from two interacting quantum emitters, and thus to advance toward new photon sources for applications in quantum technologies. With this objective, we first present a comprehensive introduction to the interaction between the electromagnetic vacuum field and quantum emitters, as well as to the correlation functions of the electric field that quantify the degree of coherence of quantum light. Afterwards, we analyze the intensity correlation of light emitted from two interacting quantum emitters and show that this quantity can be tailored over a wide range of values, which highlights the large versatility of this system as a quantum light source. Additionally, we show that the intensity correlation of Stokes-shifted and Zero-Phonon-Line photons from two interacting solid-state emitters (with or without the assistance of vibrational modes, respectively) can be very different, stressing the need to develop accurate descriptions of each experimental configuration. We also demonstrate that quantum coherence can affect the correlation of the Stokes-shifted photons, an effect that has typically been ignored. Finally, we show that two interacting emitters can also generate entangled photon pairs, which are key resources in quantum technologies. These results thus highlight the potential of interacting quantum emitters to engineer quantum states of light for fundamental studies and novel applications.