1. noise-assisted quantum transport and mobility-edges

Donny Dwiputra

Institut Teknologi Bandung, Indonesia

13 September 2022 Tue 4 pm

                                      IBS Center for Theoretical Physics of Complex Systems (PCS), Administrative Office (B349), Theory Wing, 3rd floor

                                      Expo-ro 55, Yuseong-gu, Daejeon, South Korea, 34126 Tel: +82-42-878-8633                     

Environment-assisted quantum transport (ENAQT) is a unique situation where dephasing noise may, counterintuitively, enhance the transport of an open quantum system. Here, we investigate how the presence of a one-dimensional single-particle mobility edge can generate strong ENAQT by orders of magnitude. For this purpose, we study a disordered lattice which exhibit energy-dependent mobility edges and subject to dephasing and thermal baths. In addition, we propose a disorder-free one-dimensional model which manifests an exact mobility edge using a variation of the Wannier-Stark lattice. For strong field strengths the Wannier-Stark ladder is recovered, and, in contrast to the localization of a usual Stark lattice, here the localization regime also extends to weak fields.