[en] 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 nonequilibrium Green-function technique which is evaluated at the 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.
Disciplines :
Physics
Author, co-author :
Lassl, Andreas
Schlagheck, Peter ; Université de Liège - ULiège > Département de physique > Physique quantique statistique
Richter, Klaus
Language :
English
Title :
Effects of short-range interactions on transport through quantum point contacts: A numerical approach
Publication date :
2007
Journal title :
Physical Review. B, Condensed Matter
ISSN :
0163-1829
eISSN :
1095-3795
Publisher :
American Institute of Physics, New York, United States - New York
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