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Ultracold atoms: Model kits for quantum matter
Published on 2012-04-054939 Views
Atomic samples with temperatures in the nanokelvin range, prepared by advanced methods of laser and evaporative cooling, offer unique opportunities to study a large variety of phenomena in complex qua
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Presentation
Ultracold atoms: Model kits for quantum matter00:00
Outline01:59
Ultracold quantum gases: The general ideas02:57
Laser cooling03:03
Conservative atom traps05:05
Evaporative cooling: basic idea07:56
BEC09:27
Attainment of BEC <200011:08
Attainment of BEC11:37
Degenerate Fermi gases13:45
Optical lattices14:19
Mott insulator phase transition - 115:12
Mott insulator phase transition - 216:08
84Sr Mott insulator in Innsbruck16:25
Our detectors: Imaging of atom clouds17:06
Interactions18:10
Feshbach resonance19:14
Table-top set up20:35
Magneto-optically trapped Sr atoms (461nm)20:56
Sr and Li: two-species MOT (461nm and 671nm)21:16
Magneto-opically trapped erbium (583nm)21:44
Ultracold group in Innsbruck (April 2011)22:04
Ultracold PIs22:16
Mysterious Efimov quantum states22:42
43 years ago ...22:54
42 years ago ...23:08
Efimov observations in three-body systems23:33
Vitaly Efimov visiting Innsbruck, 23 Oct 200923:45
Quantum states near two-body resonance - 124:06
Quantum states near two-body resonance - 224:51
Efimov states: Borromean region26:06
Borromean states in nuclear physics26:19
Search for Efimov states in He (1994-2005)26:46
Three-body recombination27:31
Three-body recomb. theory basics28:13
Discrete scale invariance in 3-body decay28:47
Efimov resonances29:12
Exp. results (2005) !29:45
Magnetic tunability of Cs30:32
Very recent results31:04
Variations of the three-body parameter? - 132:09
Variations of the three-body parameter? - 232:30
Vitaly Efimov & the Innsbruck Cs team33:14
2, 3, 4,…. many33:21
Strongly interacting Fermi gases34:43
Two-component Fermi gas34:49
Neutron star36:38
Interesting question37:30
dnevi_grimm_ultracold_01.jpg38:54
Table-top trapping apparatus39:47
Optical trap for evaporative cooling39:54
BEC of molecules40:07
Two classes - 140:36
Two classes - 241:17
Two classes - 341:46
Two classes - 441:49
Two classes - 541:57
Establishing superfluidity42:27
Crossover in Fermi gases43:10
Two-component Fermi system (spin mixture)44:06
Two-species: Fermi-Fermi mixture44:13
How about tunability?45:40
Elastic scattering45:54
Spin channels46:47
Experimental parameters47:31
Impurity in a Fermi sea48:32
Innsbruck Fermi-Fermi team49:55
Energy diagram (T=0)50:22
"Reverse" rf spectroscopy51:53
Spectral response - 152:14
Spectral response - 252:38
Spectral response - 353:06
Spectral response - 453:07
Measured decay rates53:58
The big question54:51
General conclusion56:07
Thank you for your attention !56:56