Room-Temperature Supersolid: Physicists Create Exotic Quantum State Without the Deep Freeze

Physicists have created a room temperature supersolid, an exotic quantum state of matter that behaves as part liquid and part solid, without the extreme cooling that quantum experiments usually demand. The result, reported by ScienceAlert on 8 November 2026 and published in the journal Science Advances, points toward cheaper and simpler ways of studying quantum behaviour — and, further down the line, toward more practical quantum technology.

The state was produced inside a tiny light-trapping structure called a microcavity, built from a liquid crystal and an organic semiconductor. It is the first time this particular quantum state has been engineered at temperatures far above the near-absolute-zero conditions that such experiments have historically required.

Room Temperature Supersolid: Quick Reference Summary

A Room Temperature Supersolid That Survives Outside the Deep Freeze

A supersolid combines two properties that sound contradictory. It flows without resistance, like a superfluid, while also holding a regular, repeating structure, like a crystal. Until now, supersolids had only been observed in ultracold atomic Bose-Einstein condensates, in experiments reported in 2017, where temperatures sit a fraction of a degree above absolute zero.

The new work breaks that pattern. The international team built its quantum state from exciton polaritons, hybrid quasiparticles formed when light and matter couple strongly inside an optical microcavity. Laser pulses supplied the energy that triggered the quantum behaviour, and the resulting condensate behaved as a quantum superfluid with a crystal-like arrangement at the same time.

“Our liquid-crystal microcavities can operate even at temperatures approaching 60 °C (140 °F),” physicist Wiktor Piecek from the Military University of Technology in Poland said. That is far above the ultracold conditions normally needed for quantum states, and it removes one of the biggest practical barriers to working with them.

How a Liquid-Crystal Microcavity Made It Possible

The experiment used a different route from the ultracold-atom approach. The optical microcavity was filled with a specially designed liquid crystal, whose properties can be controlled with voltage, and coated with an organic semiconductor, which interacts strongly with light. Together, the combination enabled strong light-matter coupling at room temperature.

As a quantum testbed, the setup has clear advantages over a cryogenic system. It is relatively inexpensive, it can be controlled via voltages, and it does not need a cryogenic fridge. That combination is what makes the result notable beyond the physics itself: it gives researchers a far more accessible way to study quantum behaviour in superfluids and supersolids.

The behaviour the scientists were looking for was relatively short-lived. The materials degraded over time, because the semiconductor reacted with the liquid crystal, and the particles themselves lasted only fractions of a second. “We had to plan the entire sequence of experiments in advance,” physicist Marcin Muszyński, from the City College of New York, said. “Repeating a measurement meant fabricating an entirely new sample.”

Stripes That Shifted: The Proof the State Was Real

The team spotted the supersolid phase by observing regularly spaced bright fringes of light emitted from the sample. Those stripes are the solid, crystal-like part of the supersolid. With each successive laser pulse, the condensate reformed, and the stripes lined up in slightly different places with every refresh.

That shifting matters. It shows the pattern came from the quantum state itself rather than from the shape of the microcavity holding it. “This is a textbook example of spontaneous symmetry breaking,” physicist Guillaume Malpuech, from the French National Centre for Scientific Research (CNRS), said. “Theory predicted that the supersolid could choose among several equivalent states, and that is exactly what we observed.”

The researchers also examined quantum vortices that appeared in the experiment — flaws in the stripe patterns that indicated superfluid behaviour. Multiple samples were tested with the same results, and the findings were backed up by computer simulation models.

Why Physicists Have Chased Supersolids Since 2017

Supersolids have been a target for physicists since they were first observed in ultracold atomic condensates in 2017. The state matters because it brings two quantum phenomena together in one system: frictionless flow and crystalline order. Studying how they coexist can reveal how quantum mechanics behaves when many particles act as a single entity.

The new approach changes who can do that studying. Ultracold-atom experiments need elaborate cooling equipment and specialist laboratories. A room-temperature system built from a liquid crystal and an organic semiconductor lowers the cost and complexity, which could let more research groups work on supersolid physics.

The experiment also involved spin-orbit coupling — the linking of light polarisation and motion that created the supersolid arrangement. The researchers say their work opens new perspectives for quantum fluids of light physics in the presence of spin-orbit coupling and beyond.

What a Room Temperature Supersolid Could Mean for Quantum Computing and Sensors

Almost any quantum effect involving light could benefit from this kind of work further down the line, including effects related to computer chips and advanced sensors. A cheaper, voltage-controlled testbed for quantum behaviour could speed up the research that eventually feeds into those technologies.

The limits need stating plainly. This is basic laboratory research, not a product, and no practical device has been announced. The state lasted fractions of a second, the materials degraded during the experiment, and the researchers themselves describe the next steps as making the reactions last longer and studying the quantum vortices in more detail.

Even so, the direction of travel is clear. Removing the deep freeze from a quantum state that once needed temperatures near absolute zero makes the physics easier to study, and easier physics is what turns laboratory curiosities into working technology.

Frequently Asked Questions

What is a supersolid?

A supersolid is a quantum state of matter that combines superfluidity — the ability to flow without resistance — with a regular, repeating crystal-like structure. It is part liquid and part solid at the same time.

What did the researchers actually create?

They created a supersolid in an exciton-polariton Bose-Einstein condensate, using a liquid-crystal optical microcavity coated with an organic semiconductor and driven by laser pulses. The findings were published in Science Advances.

Why does room temperature matter here?

Quantum states like this have previously needed temperatures close to absolute zero, which requires expensive cryogenic equipment. This state was created at room temperature, and the microcavities can operate at up to about 60 °C (140 °F), which makes the experiments far cheaper and simpler to run.

How long did the quantum state last?

Only fractions of a second. The materials degraded over time because the semiconductor reacted with the liquid crystal, so each measurement required a newly fabricated sample.

Does this mean a room-temperature quantum computer is coming?

No. This is basic laboratory research, and no practical device has been announced. The work gives researchers an easier way to study quantum behaviour, which could eventually feed into advanced computing systems and sensors, but that step has not been taken.

Who carried out the research?

An international team from the University of Warsaw, the Military University of Technology in Poland, IBM Research Zurich, and the French National Centre for Scientific Research (CNRS).