Atomic current across an optical lattice.
We devise a microscopic model for the emergence of a collision-induced, fermionic atomic current across a tilted optical lattice. Tuning the--experimentally controllable--parameters of the microscopic dynamics allows us to switch from Ohmic to negative differential conductance.
Ponomarev
Alexey V
AV
Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, 01187 Dresden, Germany.
Madroñero
Javier
J
Kolovsky
Andrey R
AR
Buchleitner
Andreas
A