IJS KOLOKVIJ, sreda, 05. 06. 2013; ob 13. uri; prof. dr. Hrvoje Buljan

[Barbara Hrovatin]

Vabimo vas na 20. predavanje iz sklopa "Kolokviji na IJS" v letu 2012/13, ki
bo v sredo, 5. junija 2013, ob 13. uri v Veliki predavalnici Instituta
>Jožef Stefan<  na Jamovi cesti 39 v Ljubljani. Napovednik predavanja
najdete tudi na naslovu http://www.ijs.si/ijsw/Koledar_prireditev, posnetke
preteklih predavanj pa na http://videolectures.net/kolokviji_ijs. 

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prof. dr. Hrvoje Buljan

Oddelek za fiziko, Univerza v Zagrebu, Zagreb, Hrvaška

 

 

Ultrahladni atomarni plini kot kvantne abakove kroglice

 

Atomarne pline lahko ohladimo do zelo nizkih temperatur (nekaj nanokelvinov
na absolutno ničlo), kjer se začnejo vesti kot kvantne tekočine. V preteklih
desetletjih je fizika takšnih sistemov zelo napredovala - predvsem zaradi
eksperimentov, v katerih lahko ultrahladne pline ujamejo v raznovrstne
ograde, spreminjamo interakcijo med gradniki in jih obdržimo izolirane od
okolice dovolj dolgo, da se ohrani njihova kvantna narava. Ta napredek je
odprl možnosti eksperimentalnega študija enorazsežnih atomarnih plinov, ki
se obnašajo kot kvantne abakove kroglice. Takšne posebne večdelčne kvantne
sisteme lahko v nekaterih primerih eksaktno teoretično analiziramo, kar ne
velja za večino kvantnih sistemov. To omogoča doslej neslutene priložnosti
za teoretične in eksperimentalne raziskave močno koreliranih ravnovesnih in
neravnovesnih stanj snovi. Najprej bomo predstavili splošne lastnosti
tovrstnih sistemov, nato pa še naše izbrane točne rezultate s področja. Na
koncu bomo pokazali, da ti sistemi nudijo poleg raziskav nizkodimenzionalnih
kvantnih plinov tudi možnost realizacije modelov v več kot treh
razsežnostih.

Predavanje bo v angleščini.

Lepo vabljeni!

 

 

*****

 

 

 

We invite you to the 20th Institute colloquium in the academic year 2012/13.
The colloquium will be held on Wednesday June 5, 2013 at 1 PM in the main
Institute lecture hall, Jamova 39, Ljubljana. To read the abstract click
http://www.ijs.si/ijsw/Koledar_prireditev. Past colloquia are posted on
http://videolectures.net/kolokviji_ijs.

 

********************************************

prof. dr. Hrvoje Buljan

Department of Physics, University of Zagreb, Zagreb, Croatia

 

Ultracold atomic gases as quantum abacus beads

 

Atomic gases can be cooled down to extremely low temperatures (a few
nano-Kelvin above absolute zero) when they start behaving as quantum fluids.
The physics of these systems has advanced considerably over the past decade
because experiments can trap such ultracold gases in versatile geometries,
their interactions can be tuned, and they can be kept isolated from the
environment for sufficiently long times to preserve their quantum nature.
These advances have opened the possibility to experimentally realize
one-dimensional atomic gases so that they behave as quantum abacus beads.
Such peculiar quantum systems of many particles can in some cases be
theoretically understood exactly, which is not the case for most quantum
systems. This gives an unprecedented opportunity to investigate strongly
correlated states of matter, in and out of equilibrium, both theoretically
and experimentally. We will present a general introduction of these systems
and our selected results based on exact solutions in these systems. Finally,
it will be shown that besides probing low dimensional quantum gases, these
systems hold the potential to realize models in more than three dimensions.

 

 

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