title: Coulomb scattering in a 2D interacting electron gas and production of EPR pairs.
abstract: We propose a setup to generate nonlocal spin Einstein-Podolsky-Rosen pairs via pair collisions in a 2D interacting electron gas, based on constructive two-particle interference in the spin-singlet channel at the pi/2 scattering angle. We calculate the scattering amplitude via the Bethe-Salpeter equation in the ladder approximation and small r(s) limit and find that the Fermi sea leads to a substantial renormalization of the bare scattering process. From the scattering length, we estimate the current of spin-entangled electrons and show that it is within experimental reach.
authors.affiliation: Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
authors.forename: D S
authors.initials: DS
authors.lastname: Saraga
authors.forename: B L
authors.initials: BL
authors.lastname: Altshuler
authors.forename: Daniel
authors.initials: D
authors.lastname: Loss
authors.forename: R M
authors.initials: RM
authors.lastname: Westervelt