Creating and sharing knowledge for telecommunications

Environment-assisted quantum walks in disordered graphs

by IT on 22-10-2013
Leonardo Novo, Physics of Information Group - IT
25/10/2013, 15:00 ­ Room P4.35, Mathematics Building, IST. Please note exceptional time and room

We study quantum walks in different network structures. We model the quantum transport by a tight-binding hamiltonian with site-energies disorder, and the interaction with the environment by pure dephasing noise. Furthermore, we introduce losses and a trapping site in the structure and calculate numerically the transport efficiency to this site. We find that optimal efficiency is achieved when the time-scale associated with dephasing matches that of the site-to-site hopping. Joint work with Y. Omar and M. Mohseni.

Quantum Computation and Information Seminar