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Ultracold atoms: Model kits for quantum matter
Published on Feb 4, 20254934 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