A blueprint for engineering future quantum materials that operate under everyday conditions. Credit LSU Quantum Photonics Group.
Physicists at Louisiana State University have developed the first room-temperature quantum material capable of distinguishing and transporting different quantum states of light.
Quantum materials could revolutionize technologies such as powerful computers, ultra-secure communications, and advanced energy systems. Until now, however, they have required extremely cold temperatures to function.
At room temperature, heat causes atoms to vibrate constantly, disrupting the fragile quantum effects scientists need. Keeping materials cold enough requires large, expensive cryogenic cooling systems, limiting their use outside the laboratory.
Part of the setup for the study. Credit Olivia Crowell
Led by Omar S. Magaña-Loaiza, the research introduces a new way to design quantum materials that could benefit quantum computing, secure communications, sensing, and energy technologies.
Instead of searching for a naturally occurring material, the team built one from scratch.
The researchers coated a glass chip with a thin layer of gold, then used focused ion beams to carve hundreds of tiny slits into the surface. These microscopic structures act like artificial atoms, or meta-atoms, forming an ultra-thin crystal unlike anything found in nature.
As light passes through the chip, it interacts with the meta-atoms. By precisely controlling their size, shape, and spacing, the researchers engineered the material to manipulate light in ways that had never before been achieved at room temperature.
Why it matters:
A quantum material that works at room temperature could eliminate the need for costly cooling systems, bringing practical quantum computers, ultra-secure communication networks, and highly sensitive sensors much closer to everyday use.
The study was published in Nature.
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