New device brings scientists closer to penetrating quantum materials Nebraska today

Researchers from the University of Nebraska-Lincoln and the University of California, Berkeley, have developed a new optical device that could bring scientists closer to the “holy grail” of finding the universal minimum of mathematical formulas at room temperature. Finding this tricky mathematical value would be a major advance in opening up new options for simulations involving quantum materials.

Many scientific questions rely heavily on being able to find that mathematical value, said Wei Bao, an assistant professor of electrical and computer engineering in Nebraska. The search can be challenging even for modern computers, especially when parameter dimensions – commonly used in quantum physics – are extremely large.

So far, researchers can only do this using Polariton optimization devices at extremely low temperatures, close to about minus 270 degrees Celsius. Bow Nebraska said-University of California The Berkeley team “found a way to combine the advantages of light and a material at room temperature appropriate for this major improvement challenge.”

The devices use quasiparticle quantum quasiparticles and half a substance known as a polariton exciton, which has recently emerged as a platform for solid-state photonic simulations for quantum physics such as Bose-Einstein condensation and complex. y Spin models.

“This breakthrough was enabled by adopting a solution of halide perovskite, a popular material for solar cell communities, and growing it under nanotechnology,” Bao said. “This will result in large, exceptionally smooth single-crystal crystals with remarkable optical homogeneity, not previously reported at room temperature for a polariton system.”

Bao is the author of the interview a Reporting sheet for this researchpublished in Nature Materials.

said Xiang Zhang, Bao’s collaborator, now president of the University of Hong Kong, who completed this research as a faculty member in mechanical engineering at the University of Hong Kong. University of California Berkeley. “We show it y A spin network with a large number of coherently coupled capacitors that can be constructed as a mesh up to 10″ x 10″.

Its material properties could also enable future studies to be carried out at room temperature rather than at very cold temperatures. Bao said, “We are just beginning to explore the potential of the room-temperature system to solve complex problems. Our work is a concrete step toward the much-anticipated room-temperature solid-state quantum simulation platform.

“The solution synthesis method we reported with excellent thickness control for very large homogeneous halide perovskites could enable many interesting studies at room temperature, without the need” for complex and expensive equipment and materials, Bao added. It also opens the door for simulation of large computational methods and many other hardware applications, previously inaccessible at room temperature.

This process is essential in an era of intense competition for quantum technologies, which is expected to transform the fields of information processing, sensing, communications, imaging, and more.

The state of Nebraska has made quantum science and engineering a priority Big challenges. It has been named a research priority because of the university’s expertise in this field and the impact Husker’s research can have in the exciting and promising field.

The title of the paper, “Halide perovskites enable polaritonic y Hamiltonians spin at room temperature. Bao’s co-authors are Kai Ping, a postdoctoral researcher in Nebraska; Renji Tao, Quanwei Li, Graham Fleming, and Xiang Zhang of Berkeley; Davi Jin of Argonne National Laboratory; and Louis Haeberlé and Stéphane Kéna-Cohen of the Montreal Polytechnic.

This work is primarily supported by the Office of Naval Research, NSF The Gordon and Betty Moore Foundation.