The Fermionic Hanbury Brown and Twiss Experiment
M. Henny,
1
S. Oberholzer,
1
C. Strunk,
1
T. Heinzel,
2
K. Ensslin,
2
M. Holland,
3
C. Schönenberger
1*
A Hanbury Brown and Twiss experiment for a beam of electrons has
been realized in a two-dimensional electron gas in the quantum Hall
regime. A metallic split gate serves as a tunable beam splitter to
partition the incident beam into transmitted and reflected partial
beams. In the nonequilibrium case the fluctuations in the partial beams
are shown to be fully anticorrelated, demonstrating that fermions
exclude each other. In equilibrium, the cross-correlation of current
fluctuations at two different contacts is also found to be negative and
nonzero, provided that a direct transmission exists between the
contacts.
1 Institute of Physics, University of Basel,
Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
2 Solid State Physics Laboratory, ETH Zürich,
CH-8093, Switzerland.
3 Department of Electronics,
University of Glasgow, Glasgow G12 8QQ, UK.
*
To whom correspondence should be addressed: E-mail:
schonenberg{at}ubaclu.unibas.ch
