Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Kohstall, C."'
Autor:
Pieri, P., Perali, A., Strinati, G. C., Riedl, S., Wright, M. J., Altmeyer, A., Kohstall, C., Guajardo, E. R. Sanchez, Denschlag, J. Hecker, Grimm, R.
Publikováno v:
Phys. Rev. A 84, 011608(R) (2011)
Radio frequency spectra of a trapped unitary 6Li gas are reported and analyzed in terms of a theoretical approach that includes both final-state and trap effects. Final-state effects play a crucial role in evidencing two main peaks both above and bel
Externí odkaz:
http://arxiv.org/abs/1102.2735
Autor:
Trenkwalder, A., Kohstall, C., Zaccanti, M., Naik, D., Sidorov, A. I., Schreck, F., Grimm, R.
Publikováno v:
Phys. Rev. Lett. 106, 115304 (2011)
We report on the expansion of a Fermi-Fermi mixture of Li-6 and K-40 atoms under conditions of strong interactions realized near the center of an interspecies Feshbach resonance. We observe two different phenomena of hydrodynamic behavior. The first
Externí odkaz:
http://arxiv.org/abs/1011.5192
Autor:
Naik, D., Trenkwalder, A., Kohstall, C., Spiegelhalder, F. M., Zaccanti, M., Hendl, G., Schreck, F., Grimm, R., Hanna, T. M., Julienne, P. S.
Publikováno v:
Eur. Phys. J. D 65, 55-65 (2011)
We present a detailed theoretical and experimental study of Feshbach resonances in the 6Li-40K mixture. Particular attention is given to the inelastic scattering properties, which have not been considered before. As an important example, we thoroughl
Externí odkaz:
http://arxiv.org/abs/1010.3662
We report on the observation of a quenched moment of inertia as resulting from superfluidity in a strongly interacting Fermi gas. Our method is based on setting the hydrodynamic gas in slow rotation and determining its angular momentum by detecting t
Externí odkaz:
http://arxiv.org/abs/0907.3814
Publikováno v:
Phys. Rev. A 79, 053628 (2009)
We investigate the lifetime of angular momentum in an ultracold strongly interacting Fermi gas, confined in a trap with controllable ellipticity. To determine the angular momentum we measure the precession of the radial quadrupole mode. We find that
Externí odkaz:
http://arxiv.org/abs/0903.3530
Autor:
Riedl, S., Guajardo, E. R. Sanchez, Kohstall, C., Altmeyer, A., Wright, M. J., Denschlag, J. Hecker, Grimm, R., Bruun, G. M., Smith, H.
Publikováno v:
Phys. Rev. A 78, 053609 (2008)
We present detailed measurements of the frequency and damping of three different collective modes in an ultracold trapped Fermi gas of $^6$Li atoms with resonantly tuned interactions. The measurements are carried out over a wide range of temperatures
Externí odkaz:
http://arxiv.org/abs/0809.1814
Autor:
Wright, M. J., Riedl, S., Altmeyer, A., Kohstall, C., Guajardo, E. R. Sanchez, Denschlag, J. Hecker, Grimm, R.
Publikováno v:
Phys.Rev.Lett.99:150403,2007
We report on experimental studies on the collective behavior of a strongly interacting Fermi gas with tunable interactions and variable temperature. A scissors mode excitation in an elliptical trap is used to characterize the dynamics of the quantum
Externí odkaz:
http://arxiv.org/abs/0707.3593
Publikováno v:
Phys. Rev. A 76, 033610 (2007)
We report on measurements of an elementary surface mode in an ultracold, strongly interacting Fermi gas of 6Li atoms. The radial quadrupole mode allows us to probe hydrodynamic behavior in the BEC-BCS crossover without being influenced by changes in
Externí odkaz:
http://arxiv.org/abs/0704.3366
Publikováno v:
Physical Review Letters 98 (2007) 103602
We present a reinterpretation of our previous results on the radial compression mode of a degenerate quantum gas in the BEC-BCS crossover in [1]. We show that our former data are consistent with other experimental and theoretical work, when the ellip
Externí odkaz:
http://arxiv.org/abs/cond-mat/0611285
Autor:
Altmeyer, A., Riedl, S., Kohstall, C., Wright, M., Geursen, R., Bartenstein, M., Chin, C., Denschlag, J. Hecker, Grimm, R.
Publikováno v:
Phys.Rev.Lett.98:040401,2007
We report on precision measurements of the frequency of the radial compression mode in a strongly interacting, optically trapped Fermi gas of Li-6 atoms. Our results allow for a test of theoretical predictions for the equation of state in the BEC-BCS
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609390