Light induced quantum states of matter with fractional charges Pouyan GhaemiThe City College of New YorkCity University of New York

Abstract: When a metal is placed in a strong magnetic field, the kinetic energy of electrons is suppressed, and electron-electron interaction becomes the dominant energy scale and controls the properties of the system. This leads to novel phenomena, such as realization of fractional charge, which cannot be explained based on properties of individual electrons. Such phases result from a collective and coherent organization of all electrons in the sample. On another front, it has been long known that interaction of photons and single electronic states in materials can illuminate important quantum properties of the single electronic states. The emission and absorption of the hydrogen atom is a well-known example in this regard. In this talk, I show that interaction of light with a collective phase of matter, such as fractional Hall states, will open new ways to manipulate entangled electronic states. I will show that such interaction of photons with entangled electronic states can lead to the development new electronic states with potential applications in quantum computing. Phys. Rev. Lett. 119, 247403 (2017) Phys. Rev. B 95, 235439 (2017)

Web page of Prof. Pouyan Ghaemi

Cette conférence est présentée par le RQMP Versant Nord du Département de physique de l'Université de Montréal et de Génie physique de la Polytechnique.