Almost every quantum material discovered so far works only when cooled to temperatures near absolute zero. As a result, quantum materials can perform remarkable tasks in carefully controlled laboratories, but they are difficult and expensive to use in real-world devices. A Quantum Material That Works at Room TemperatureLSU physicists have now created the first room-temperature quantum material able to identify and transport distinct quantum states of light. The advance, reported in Nature, addresses one of the most significant barriers in quantum materials research. The findings therefore provide a general blueprint for building many future quantum materials, rather than offering only one isolated discovery.