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</o:shapelayout></xml><![endif]--></head><body lang=SL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Vabimo vas na 20. predavanje iz sklopa "Kolokviji na IJS" v letu 2012/13, ki bo <strong><span style='color:black'>v sredo, 5. junija 2013, ob 13. uri </span></strong><span style='color:black'>v Veliki predavalnici Instituta »Jožef Stefan« na </span>Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu <a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>. <o:p></o:p></p><p class=MsoNormal>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br><br><o:p></o:p></p><p class=MsoNormal><b>prof. dr. Hrvoje Buljan<o:p></o:p></b></p><p class=MsoNormal><i>Oddelek za fiziko, Univerza v Zagrebu, Zagreb, Hrvaška<o:p></o:p></i></p><p class=MsoNormal><i><o:p> </o:p></i></p><p class=MsoNormal><b><span style='font-size:14.0pt;mso-fareast-language:SL'><o:p> </o:p></span></b></p><p class=MsoNormal style='text-align:justify'><b><span style='font-size:14.0pt'>Ultrahladni atomarni plini kot kvantne abakove kroglice<o:p></o:p></span></b></p><p class=MsoNormal style='text-align:justify'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='text-align:justify'>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.<i><o:p></o:p></i></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Predavanje bo v angleščini.<span style='mso-fareast-language:SL'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span style='font-family:"Calibri","sans-serif";color:black'>Lepo vabljeni!</span></strong><strong><span style='color:black;font-weight:normal'><o:p></o:p></span></strong></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>*****<o:p></o:p></span></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>We invite you to the 20th Institute colloquium in the academic year 2012/13. The colloquium will be held <b>on Wednesday June 5, 2013 at 1 PM</b> in <b>the main Institute</b></span><b><span style='color:#1F497D'> </span><span style='color:black'>lecture hall</span></b><span style='color:black'>, Jamova 39, Ljubljana. To read the abstract click </span><span style='color:#1F497D'><a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>. </span><span style='color:black'>Past colloquia are posted on</span><span style='color:#1F497D'> <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'>********************************************<b><o:p></o:p></b></p><p class=MsoNormal><b>prof. dr. Hrvoje Buljan<o:p></o:p></b></p><p class=MsoNormal><i>Department of Physics, University of Zagreb, Zagreb, Croatia<o:p></o:p></i></p><p class=MsoNormal><b><span style='font-size:16.0pt'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:16.0pt'>Ultracold atomic gases as quantum abacus beads</span></b><b><span style='font-size:16.0pt;mso-fareast-language:SL'><o:p></o:p></span></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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<span lang=EN-GB> many</span> particles can in some cases be theoretically understood exactly, which is not the case for most quantum systems. This gives<span lang=EN-AU> an unprecedented</span> 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.<o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div></body></html>