Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Schunck C"'
Publikováno v:
Phys. Rev. Lett. 99, 090403 (2007)
We present spatially resolved radio-frequency spectroscopy of a trapped Fermi gas with resonant interactions and observe a spectral gap at low temperatures. The spatial distribution of the spectral response of the trapped gas is obtained using in sit
Externí odkaz:
http://arxiv.org/abs/0705.3858
Publikováno v:
Science 316, 867-870 (2007)
Radio-frequency spectroscopy is used to study pairing in the normal and superfluid phases of a strongly interacting Fermi gas with imbalanced spin populations. At high spin imbalances the system does not become superfluid even at zero temperature. In
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702066
We study the expansion of a rotating, superfluid Fermi gas. The presence and absence of vortices in the rotating gas is used to distinguish superfluid and normal parts of the expanding cloud. We find that the superfluid pairs survive during the expan
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607298
Publikováno v:
Phys. Rev. Lett. 97, 030401 (2006)
We have observed phase separation between the superfluid and the normal component in a strongly interacting Fermi gas with imbalanced spin populations. The in situ distribution of the density difference between two trapped spin components is obtained
Externí odkaz:
http://arxiv.org/abs/cond-mat/0606432
Publikováno v:
Nature 435, 1047-1051 (2005)
Quantum-degenerate Fermi gases provide a remarkable opportunity to study strongly interacting fermions. In contrast to other Fermi systems, such as superconductors, neutron stars or the quark-gluon plasma, these gases have low densities and their int
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505635
The formation time of a condensate of fermionic atom pairs close to a Feshbach resonance was studied. This was done using a phase-shift method in which the delayed response of the many-body system to a modulation of the interaction strength was recor
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412675
Autor:
Schunck, C. H., Zwierlein, M. W., Stan, C. A., Raupach, S. M. F., Ketterle, W., Simoni, A., Tiesinga, E., Williams, C. J., Julienne, P. S.
Publikováno v:
Phys.Rev.A71:045601,2005
Feshbach resonances in lithium-6 were experimentally studied and theoretically analyzed. In addition to two previously known s-wave resonances, we found three p-wave resonances. Four of these resonances are narrow and yield a precise value of the sin
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407373
We have observed three Feshbach resonances in collisions between lithium-6 and sodium-23 atoms. The resonances were identified as narrow loss features when the magnetic field was varied. The molecular states causing these resonances have been identif
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406129
Autor:
Zwierlein, M. W., Stan, C. A., Schunck, C. H., Raupach, S. M. F., Kerman, A. J., Ketterle, W.
We have observed Bose-Einstein condensation of pairs of fermionic atoms in an ultracold ^6Li gas at magnetic fields above a Feshbach resonance, where no stable ^6Li_2 molecules would exist in vacuum. We accurately determined the position of the reson
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403049
Autor:
Zwierlein, M. W., Stan, C. A., Schunck, C. H., Raupach, S. M. F., Gupta, S., Hadzibabic, Z., Ketterle, W.
Publikováno v:
Phys. Rev. Lett. 91, 250401 (2003)
We have observed Bose-Einstein condensation of molecules. When a spin mixture of fermionic Li-6 atoms was evaporatively cooled in an optical dipole trap near a Feshbach resonance, the atomic gas was converted into Li_2 molecules. Below 600 nK, a Bose
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311617