Coulomb scattering in a 2D interacting electron gas and production of EPR pairs

We propose a setup to generate non-local spin-EPR 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...

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Published in:arXiv.org 2003-10
Main Authors: Saraga, D S, Altshuler, B L, Loss, Daniel, Westervelt, R M
Format: Article
Language:English
Subjects:
Bethe-Salpeter equation
Electron gas
Electron spin
Particle spin
Scattering amplitude
Scattering angle
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Altshuler, B L
Loss, Daniel
Westervelt, R M
description We propose a setup to generate non-local spin-EPR 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.
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subjects Bethe-Salpeter equation
Electron gas
Electron spin
Particle spin
Scattering amplitude
Scattering angle
title Coulomb scattering in a 2D interacting electron gas and production of EPR pairs
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