Microwave photons emitted by fractionally charged quasiparticles.

ABSTRACT: Strongly correlated low-dimensional systems can host exotic elementary excitations carrying a fractional charge q and potentially obeying anyonic statistics. In the fractional quantum Hall effect, their fractional charge has been successfully determined owing to low frequency shot noise measurements. However, a universal method for sensing them unambiguously and unraveling their intricate dynamics was still lacking. Here, we demonstrate that this can be achieved by measuring the microwave photons emitted by such excitations when they are transferred through a potential barrier biased with a dc voltage V_dc. We observe that only photons at frequencies f below qV_dc/h are emitted. This threshold provides a direct and unambiguous determination of the charge q, and a signat

SUBMITTER: Bisognin R 

PROVIDER: S-EPMC6461615 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature