Extraordinary light matter interactions: Polychromatic light, strong coupling, and a broken symmetry

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• Benjamin Yuen (Birmingham Metamaterials)
• Thursday 02 December 2021, 13:15-14:30
• Theory Library.

If you have a question about this talk, please contact Dr Hannah Price.

The absorption and emission of photons by well isolated quantum emitters are cornerstones of quantum optics, the principles of which form the basis of a wide range of phenomena from laser cooling to the manipulation of qubits. Yet the complexity of the quantum electrodynamics grows rapidly for all but the simplest scenario of a two level system interacting with a monochromatic field to the point where the dynamics become difficult to utilise.

In this talk I will explore beyond the boundaries of conventional quantum optical systems, asking what happens when the light has multiple frequencies components, or when there are multiple emitters deep with the strong coupling regime. I will introduce an alternative to the multifrequency Floquet approach which produces accurate analytic descriptions of the dynamics of dipoles in multi-frequency fields. I will then discuss how the extremely strong field enhancement in a photonic environment affects the dynamics of multiple three level systems, breaking the spin symmetry in an effective Dicke model. I will give an exciting outlook of how combining this system with multi- frequency light could produce new quantum technologies based on elusive multi-photon states.

This talk is part of the Theoretical Physics Seminars series.

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