Effects of short-range interactions on transport through quantum point contacts: A numerical approach

Abstract

We study electronic transport through a quantum point contact, where the interaction between the electrons is approximated by a contact potential. Our numerical approach is based on the non-equilibrium Green function technique which is evaluated at Hartree-Fock level. We show that this approach allows us to reproduce relevant features of the so-called "0.7 anomaly" observed in the conductance at low temperatures, including the characteristic features in recent shot noise measurements. This is consistent with a spin-splitting interpretation of the process, and indicates that the "0.7 anomaly" should also be observable in transport experiments with ultracold fermionic atoms.

12 pages, 10 figures

References in corpus (2)

• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Magnetic Moment Formation in Quantum Point Contacts

Cited by in corpus (7)

• Electron-electron interaction effects in quantum point contacts
• Non-Kondo zero-bias anomaly in quantum wires
• Zeeman ratchets: pure spin current generation in mesoscopic conductors with non-uniform magnetic fields
• Conductance Anomaly and Fano Factor Reduction in Quantum Point Contacts
• Detection of interaction-induced nonlocal effects using perfectly transmitting nanostructures
• Theory of NMR in semiconductor quantum point contact devices
• Resonant tunneling-based spin ratchets