Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Geckeler, Carsten"'
Autor:
Salger, Tobias, Kling, Sebastian, Hecking, Tim, Geckeler, Carsten, Morales-Molina, Luis, Weitz, Martin
Publikováno v:
Science 326, 1241 (2009)
We demonstrate the operation of a quantum ratchet in the absence of dissipative processes within the observation time (Hamiltonian regime). An atomic rubidium Bose-Einstein condensate is exposed to a sawtooth-like optical lattice potential, whose amp
Externí odkaz:
http://arxiv.org/abs/0912.0102
Publikováno v:
Phys. Rev. A 79, 011605(R) (2009)
We report on experiments studying transport properties of an atomic Bose-Einstein condensate in an optical lattice of spatial period $\lambda/2n$, where $n$ is an integer, realized with the dispersion of multiphoton Raman transitions. We observe Bloc
Externí odkaz:
http://arxiv.org/abs/0711.1772
Publikováno v:
Phys. Rev. Lett. 99, 190405 (2007)
We report on an experimental study of quantum transport of atoms in variable periodic optical potentials. The band structure of both ratchet-type asymmetric and symmetric lattice potentials is explored. The variable atom potential is realized by supe
Externí odkaz:
http://arxiv.org/abs/0707.1980
Publikováno v:
Phys. Rev. A 74, 063622 (2006)
We demonstrate a scheme for the Fourier synthesis of periodic optical potentials with asymmetric unit cells for atoms. In a proof of principle experiment, an atomic Bose-Einstein condensate is exposed to either symmetric or sawtooth-like asymmetric p
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512018
Publikováno v:
Phys. Rev. A 77, 013613 (2008)
We report on the observation of interference of a series of atom lasers. A comb-like array of coherent atomic beams is generated by outcoupling atoms from distinct Bose-Einstein condensates confined in the independent sites of a mesoscopic optical la
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510629
Publikováno v:
Phys. Rev. A 72, 051601(R) (2005)
We have studied the interference of a variable number of independently created $m_F=0$ microcondensates in a CO$_{2}$-laser optical lattice. The observed average interference contrast decreases with condensate number N. Our experimental results agree
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505768
Publikováno v:
Appl. Phys. B 77, 773 (2003)
We report on the achieving of Bose-Einstein condensation of a dilute atomic gas based on trapping atoms in tightly confining CO_2-laser dipole potentials. Quantum degeneracy of rubidium atoms is reached by direct evaporative cooling in both crossed a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0312439
Publikováno v:
Phys. Rev. Lett. 91, 240408 (2003)
We demonstrate an atom laser using all-optical techniques. A Bose-Einstein condensate of rubidium atoms is created by direct evaporative cooling in a quasistatic dipole trap realized with a single, tightly focused CO$_{2}$-laser beam. An applied magn
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307620
Autor:
Kehrberg, Steven, Dorwarth, Markus, Gunther, Sebastian, Markisch, Steffen, Geckeler, Carsten, Mehner, Jan
Publikováno v:
2014 15th International Conference on Thermal, Mechanical & Multi-Physics Simulation & Experiments in Microelectronics & Microsystems (EuroSimE); 2014, p1-4, 4p
Publikováno v:
2013 IEEE SENSORS; 2013, p1-4, 4p