Two electrons are better than one... In the Yb lab we produce Bose-Einstein condensates and degenerate Fermi gases of ytterbium atoms. These atoms offer metastable electronic states, ultranarrow clock transitions, multicomponent fermions with SU(N) interactions: a whole range of experimental tools that allow new possibilities for quantum simulation and quantum information processing.

Fermions take a curve in the extra-dimension

Chiral edge states are a hallmark of quantum Hall physics. In electronic systems, they appear as a macroscopic consequence of the cyclotron orbits induced by a magnetic field, which are naturally truncated at the physical boundary of the sample. Here we report on the experimental realization of chiral edge states in a ribbon geometry with an ultracold gas of neutral fermions subjected to an artificial gauge field. By imaging individual sites along a synthetic dimension, we detect the existence of the edge states, investigate the onset of chirality as a function of the bulk-edge coupling, and observe the edge-cyclotron orbits induced during a quench dynamics. The realization of fermionic chiral edge states is a fundamental achievement, which opens the door towards experiments including edge state interferometry and the study of non-Abelian anyons in atomic systems.

M. Mancini et al.,
Observation of chiral edge states with neutral fermions in synthetic Hall ribbons
Science 349, 1510 (2015)

See also the Science Perspective by A. Celi and L. Tarruell:

A. Celi and L. Tarruell
Probing the edge with cold atoms
Science 349, 1450 (2015)

Yb people

Lorenzo Franchi
PhD student
Lorenzo Livi
PhD student
Giacomo Cappellini
Postdoc
Jacopo Catani
Scientific staff
Massimo Inguscio
Scientific staff
Leonardo Fallani
Scientific staff
Former members:
Giovanni Giusfredi
Jonathan T. Green
Pietro Lombardi
Marco Mancini
Pablo Cancio Pastor
Guido Pagano
Florian Schäfer
Carlo Sias

Yb contacts

For further information, request of material, job opportunities, please contact:

Leonardo Fallani
(fallani@lens.unifi.it)

Yb funding

ERC CoG TOPSIM
PRIN2012 AQUASIM
EU FP7 SIQS
INFN FISh