The emergent field of cavity quantum materials bridges collective many-body phenomena in
solid state platforms with strong light–matter coupling in cavity quantum electrodynamics …

Quantum-mechanical phenomena underpin the behaviour of quantum materials at the
microscopic level. The description of several essential properties of these materials …

Magnetic order typically emerges due to the short-range exchange interaction between the
constituent electronic spins. Recent discoveries have found a crucial role for spin-phonon …

The ground-state properties and excitation energies of a quantum emitter can be modified in
the ultrastrong coupling regime of cavity quantum electrodynamics (QED) where the light …

Anisotropy has been a key property employed in the design of optical components for
hundreds of years. However, in recent years there has been growing interest in polaritons …

A material with symmetry breaking inside can transmit the symmetry breaking to its vicinity
by vacuum electromagnetic fluctuations. Here, we show that vacuum quantum fluctuations …

Recent experimental advances enable the manipulation of quantum matter by exploiting the
quantum nature of light. However, paradigmatic exactly solvable models, such as the Dicke …

The interplay of light and matter gives rise to intriguing cooperative effects in quantum many-
body systems. This is even true in thermal equilibrium, where the electromagnetic field can …

Harnessing the enhanced light-matter coupling and quantum vacuum fluctuations resulting
from mode volume compression in optical cavities is a promising route towards …

Excitation and nonlinear control of lattice vibrations with light has become a powerful
method to manipulate the properties of quantum materials out of equilibrium. Generalizing …