Work

Cavity Spectroscopy for Strongly Correlated Polaritonic Systems

Year: 2025

Type: article

Abstract: Embedding materials in optical cavities has emerged as an intriguing perspective for controlling quantum materials, but a key challenge lies in measuring properties of the embedded matter. Here, we propose a framework for probing strongly correlated cavity-embedded materials through direct measurements of cavity photons. We derive general relations between photon and matter observables inside the cavity, and show how these can be measured via the emitted photons. As an example, we demonstrate how the entanglement phase transition of an embedded H_{2} molecule can be accessed by measuring the cavity photon occupation, and showcase how dynamical spin correlation functions can be accessed by measuring dynamical photon correlation functions. Our framework provides an all-optical method to measure static and dynamic properties of cavity-embedded materials.

Source: Physical Review Letters

DOI: 10.1103/1lpw-22np

Authors: Lukas Grunwald, Emil Viñas Boström, Mark Kamper Svendsen, Dante M. Kennes, Angel Rubio

Institutions: Max Planck Institute for the Structure and Dynamics of Matter, RWTH Aachen University, University of the Basque Country, Flatiron Institute

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750