Entanglement between spin and orbital degrees of freedom in a 2D electron gas

Authors

Francis N. C. Paraan; Rona F Barbarona

Source

International Workshop on Non-linear Effects and Short-time Dynamics in Novel Superconductors and Correlated Spin-orbit Coupled Systems, Daejeon, South Korea, 1 (2017).

Abstract

The Rashba interaction couples spin and orbital degrees of freedom in a two-dimensional electron gas. A Landau level basis leads to an equivalent spin-boson model that couples adjacent Landau levels. We study the entanglement between the spin and orbital subspaces in the ground state of a gas of electrons described by this Hamiltonian. The spin-orbit entanglement entropy as a function of filling factor is piecewise smooth with discontinuous derivatives due to gapped levels of degenerate orbitals and level crossings.