Negative differential conductivity (NDC) is a widely exploited mechanism in many areas of research dealing with particle and energy transport. We experimentally realize such a many body quantum transport system based on ultracold atoms in a periodic potential. We prepare our system by loading Bose condensed rubidium atoms in a 1D optical lattice with high atom occupancy per lattice site. Subsequently, we remove all the atoms from a central lattice site. While the atoms from neighboring sites tunnel into the empty site, we observe NDC in the resulting current voltage characteristics and investigate the microscopic mechanism behind it [R. Labouvie, B. Santra, S. Heun, S. Wimberger, H. Ott, arXiv:1411.5632].
Negative Differential Conductivity in an Interacting Quantum Gas / Bodhaditya, Santra; Ralf, Labouvie; Simon, Heun; Wimberger, Sandro Marcel; Herwig, Ott. - In: BULLETIN OF THE AMERICAN PHYSICAL SOCIETY. - ISSN 0003-0503. - 60:7(2015).
Negative Differential Conductivity in an Interacting Quantum Gas
WIMBERGER, Sandro Marcel;
2015-01-01
Abstract
Negative differential conductivity (NDC) is a widely exploited mechanism in many areas of research dealing with particle and energy transport. We experimentally realize such a many body quantum transport system based on ultracold atoms in a periodic potential. We prepare our system by loading Bose condensed rubidium atoms in a 1D optical lattice with high atom occupancy per lattice site. Subsequently, we remove all the atoms from a central lattice site. While the atoms from neighboring sites tunnel into the empty site, we observe NDC in the resulting current voltage characteristics and investigate the microscopic mechanism behind it [R. Labouvie, B. Santra, S. Heun, S. Wimberger, H. Ott, arXiv:1411.5632].I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
