
From left to right: Professor Wei Bao, Ph.D. student Wei Li, and Ph.D. student Yilin Meng perform experiments in Bao's lab.
Photo Credit: Courtesy of Rensselaer Polytechnic Institute
Scientific Frontline: Extended "At a Glance" Summary: Room-Temperature Supersolids
The Core Concept: A supersolid is an exotic quantum state of matter that simultaneously exhibits the ordered, crystal-like spatial structure of a solid and the frictionless flow of a superfluid. Researchers have successfully generated this state at room temperature by engineering light-matter interactions within a nanoscale device.
Key Distinction/Mechanism: Historically, supersolid states have only been observed under extremely cold conditions near absolute zero. This new method dynamically generates the state at room temperature by utilizing a laser to illuminate a perovskite nanostructure, forming hybrid light-matter particles known as polaritons. As the input energy increases beyond a critical threshold, these polaritons spontaneously self-organize from a uniform state into a stable, periodic striped pattern while maintaining systemic quantum coherence.
Major Frameworks/Components:
- Polaritons: Hybrid quasiparticles consisting of part light and part matter that behave collectively to form a coherent quantum fluid.
- Perovskite Nanostructures: High-quality semiconductor crystals integrated with precisely patterned nanostructures designed to reliably trap and confine light.
- Dynamic Phase Transition: A nonequilibrium process where competing quantum states spontaneously stabilize into a random, self-organized periodic pattern without external imposition.
- Quantum Coherence: The functional ability of the polaritons to maintain synchronized quantum states across the entire macroscopic system, despite the rigid structural ordering.
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