The THEORIE team just published in Phys. Rev. Lett. an article on the topological properties of cavity quantum materials.

Topological materials exhibit extraordinary properties, thanks to the unique characteristics of their electronic wavefunctions. To grasp this concept, think of it as counting the holes in everyday objects—a donut, regardless of its size or toppings, unequivocally boasts one hole. Similarly, non-zero integer values known as “Chern numbers” serve as signatures of intricate topological phases in materials.

In their study, the researchers of the THEORIE team delve into a remarkable phenomenon. By immersing a 2D material within a cavity resonator, they’ve unveiled a fascinating capability to reshape its inherent topology. This transformation arises from a captivating interplay between an electron and a cavity quantum electromagnetic field, akin to an intricate dance where partners become profoundly entangled.

Traditionally, the electron Chern number was deemed a paramount topological property. However, within the entwined realm of electron-photon interactions, the electron Chern number loses its exclusive status. Instead, the researchers made a fascinating discovery—an entirely new Chern number emerges, one intricately linked to the hybrid electron-photon eigenstates. This revelation reshapes our understanding of material topology and opens doors to unprecedented possibilities in the realm of quantum materials.

Reference :

Electron-photon Chern number in cavity-embedded 2D moiré materials

Danh-Phuong Nguyen, Geva Arwas, Zuzhang Lin, Wang Yao, and Cristiano Ciuti

Phys. Rev. Lett. 131, 176602 (2023) 


À lire aussi

QFLM 2022 School at Varenna, Italy

QFLM 2022 School at Varenna, Italy

The International School "Quantum Fluids of Light and Matter (QFLM2022)" in Varenna was a great success with many distinguished lecturers and a great audience of students, postdocs and senior researchers.QFLM 2022 was co-organized by Cristiano Ciuti with Alberto...

Neural networks for the simulation of quantum systems

Neural networks for the simulation of quantum systems

The theory group of MPQ publishes in Phys. Rev. Lett. a pioneering article on the utilization of neural networks to simulate open quantum systems. It is highlighted by a Viewpoint in Physics together with three other independent works. Link to the Viewpoint in Physics...