A supersolid is a strange state of matter that flows without friction like a superfluid while also forming a regular, crystal-like pattern. Predicted in the 1960s, it was first seen in 2017 in ultracold atoms, close to absolute zero. Now researchers from the University of Warsaw, the Military University of Technology in Poland, IBM Research Zurich and France's CNRS have observed it at room temperature.
Instead of atoms, the team used exciton-polaritons, hybrid particles of light and matter, inside an optical microcavity filled with a liquid crystal and coated with an organic semiconductor. The supersolid revealed itself as regularly spaced bright fringes in the emitted light, and the fringes landed in a different position with every laser pulse, a textbook sign of spontaneous symmetry breaking.
Because the liquid-crystal cavities can be tuned with a voltage, the work, published in Science Advances, could open a path to light-based quantum devices.
Source: Phys.org (University of Warsaw), November 3, 2026 — https://phys.org/news/2026-11-hybrids-supersolid-quantum-state-room.html



































































































