Polaritonic Chemistry - Coherent Quantum Control of Molecules with Modified Vacuum Fields

Session

Monday Morning

4 May 2026, 09:00

Albano 3: 4205 - SU Conference Room (40 seats) (Albano Building 3)

32. Welcome and Introduction

04/05/2026, 09:00

8. The Many Faces of Strong Light–Matter Interactions: From Non-Thermal Aging to Quantum Twin Polaritons

Norah Hoffmann (New York University)

04/05/2026, 09:05

Invited Talk

Strong light–matter interactions span a wide range of questions, from the nature of the cavity itself (e.g., microcavities versus plasmonic cavities), to local versus collective coupling effects, and the distinction between classical and quantum behavior, to name just a few. In this talk, I will focus on two somewhat complementary perspectives that highlight these different facets.

First, I...

29. Quantum dynamics and electronic structure of polaritonic Hamiltonians with MCTDH: things we learned so far

Oriol Vendrell (University of Heidelberg)

04/05/2026, 09:35

Invited Talk

Recent results on ensembles of the rotational-vibrational-electronic Shin-Metiu
model using variational tree-tensor network quantum dynamics will be discussed
first. This model captures rovibronic couplings exactly and beyond the
Born-Oppenheimer approximation, within the Pauli-Fierz Hamiltonian. Inspecting
the fully converged ground state for a range of coupling strengths we find...

20. Raman scattering of phonon polaritons under nanoscale confinement: the role of structure and environment

Timur Shegai (Chalmers University of Technology)

04/05/2026, 10:45

Invited Talk

Strong light-matter coupling in polar materials gives rise to phonon polaritons – hybrid quasiparticles with mixed photonic and vibrational character. Here, we show that polar nanocrystals exhibit Raman scattering that depends sensitively on their structure and electromagnetic environment. This spectral dispersion enables refractive index sensing in the mid-infrared via visible-wavelength...

9. Stimulated cooling in non-equilibrium Bose–Einstein condensate

Anton Zasedatelev (Aalto University)

04/05/2026, 11:15

Invited Talk

We report on the experimental observation of stimulated cooling in the non-equilibrium Bose–Einstein condensate (BEC) of weakly interacting exciton-polaritons from approximately room temperature down to 20 K. Our results indicate that the temperature of the weakly interacting Bose gas is universally set by the density-dependent chemical potential, revealing a defining property of...