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</style></div><div><br><div><div style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 12pt;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 12pt;"><br><br><div><div style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 12pt;" data-mce-style="color: #000000; font-family: arial, helvetica, sans-serif; font-size: 12pt;"><div style="color: #000000; font-family: times new roman, new york, times, serif; font-size: 12pt;" data-mce-style="color: #000000; font-family: times new roman, new york, times, serif; font-size: 12pt;"><div style="text-align: center;" data-mce-style="text-align: center;"><strong><b><span lang="HR" style="color: black; font-size: 16pt;" data-mce-style="color: black; font-size: 16pt;"><img><img src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra" data-mce-src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra"></span></b></strong></div><div style="text-align: center;" data-mce-style="text-align: center;"><p align="center" style="margin: 0px; text-align: center;" data-mce-style="margin: 0px; text-align: center;"><b><span lang="EN-GB" style="color: #5f5f5f; font-family: 'Century Gothic',sans-serif;" data-mce-style="color: #5f5f5f; font-family: 'Century Gothic',sans-serif;">Institut za fiziku, Bijenička cesta 46,</span></b></p><p align="center" style="margin: 0px; text-align: center;" data-mce-style="margin: 0px; text-align: center;"><b><span lang="EN-GB" style="color: #5f5f5f; font-family: 'Century Gothic',sans-serif;" data-mce-style="color: #5f5f5f; font-family: 'Century Gothic',sans-serif;">predavaonica u zgradi Mladen Paić</span></b></p><strong><b><span lang="EN-GB" style="color: #993300; font-family: 'Century Gothic',sans-serif; font-size: 14pt;" data-mce-style="color: #993300; font-family: 'Century Gothic',sans-serif; font-size: 14pt;">srijeda, 14. ožujka 2018., u 15:00 sati</span></b><br></strong></div><div style="text-align: center;" data-mce-style="text-align: center;"><strong></strong> </div><div style="text-align: center;" data-mce-style="text-align: center;"> <p class="MsoNormal" style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: 'Arial',sans-serif;" data-mce-style="font-family: 'Arial',sans-serif;"><strong><span style="font-size: 16pt; color: #3366ff;" data-mce-style="font-size: 16pt; color: #3366ff;">Spontaneous magnetic and density structures in cold atoms via light mediated interactions</span></strong></span></p> <br></div><div style="text-align: center;" data-mce-style="text-align: center;"><strong><span lang="EN-GB" style="font-family: 'Century Gothic',sans-serif; font-size: 14pt;" data-mce-style="font-family: 'Century Gothic',sans-serif; font-size: 14pt;">Thorsten Ackermann</span></strong></div><div style="text-align: center;" data-mce-style="text-align: center;"><b></b> </div><div style="text-align: center;" data-mce-style="text-align: center;"> <p class="MsoNormal" style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><em><span style="font-family: 'Arial',sans-serif;" data-mce-style="font-family: 'Arial',sans-serif;">SUPA and Department of Physics</span></em></span></p><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><em><span style="line-height: 107%; font-family: Arial, sans-serif;" data-mce-style="line-height: 107%; font-family: Arial, sans-serif;">University of Strathclyde</span></em></span><br></div><div style="text-align: center;" data-mce-style="text-align: center;"><span style="font-family: Arial; font-size: small;" data-mce-style="font-family: Arial; font-size: small;"></span><br><br></div> <p class="MsoNormal" style="margin: 0px; line-height: normal;" data-mce-style="margin: 0px; line-height: normal;"><span style="font-family: Arial, sans-serif; font-size: 12pt;" data-mce-style="font-family: Arial, sans-serif; font-size: 12pt;">Recent years have witnessed considerable interest in simulating the dynamics of complex many-body systems by well-controlled cold atom model systems. Among others, magnetic ordering phenomena and supersolids draw a lot of attention. I will discuss an unconventional approach to light mediated atomic interactions using diffraction of light. Diffractive propagation of periodically modulated light fields leads to an exchange between phase and amplitude modulated planes (Talbot effect) which can be used to couple atomic degrees of freedom. In a feedback scheme this can lead to the spontaneous formation of coupled lattices in the light field and the atomic degrees of freedom. In the experiment a cold cloud of Rb atoms placed near a retro-reflecting mirror is driven by a detuned pump laser. Via optomechanical nonlinearities, </span></p><p class="MsoNormal" style="margin: 0px; line-height: normal;" data-mce-style="margin: 0px; line-height: normal;"><span style="font-family: Arial, sans-serif; font-size: 12pt;" data-mce-style="font-family: Arial, sans-serif; font-size: 12pt;">the spontaneous emergence of density patterns is obtained and a possible extension to supersolids is discussed.<span style="mso-spacerun: yes;" data-mce-style="mso-spacerun: yes;"> </span>Via optical pumping nonlinearities magnetic ordering of anti-ferromagnetic and ferromagnetic structures is obtained and a connection to the transverse (quantum) Ising model exploited. Finally, novel spontaneous structures in quantum coherences are demonstrated, which corresponding to rotations of magnetic quadrupole structures.</span><span lang="EN-US" style="font-family: 'Arial',sans-serif; mso-ansi-language: EN-US;" data-mce-style="font-family: 'Arial',sans-serif; mso-ansi-language: EN-US;"></span></p><br></div><div style="text-align: left;" data-mce-style="text-align: left;"><b><span lang="EN-GB" style="font-family: 'Century Gothic',sans-serif; font-size: 12pt;" data-mce-style="font-family: 'Century Gothic',sans-serif; font-size: 12pt;"><b><span lang="EN-GB" style="font-family: 'Century Gothic',sans-serif; font-size: 11pt;" data-mce-style="font-family: 'Century Gothic',sans-serif; font-size: 11pt;"> </span></b></span></b><b><span lang="EN-GB" style="font-family: 'Century Gothic',sans-serif; font-size: 12pt;" data-mce-style="font-family: 'Century Gothic',sans-serif; font-size: 12pt;"><b><span lang="EN-GB" style="font-family: 'Century Gothic',sans-serif; font-size: 11pt;" data-mce-style="font-family: 'Century Gothic',sans-serif; font-size: 11pt;">Voditelji seminara IF-a: <a href="mailto:hrvoje@ifs.hr" target="_blank">Hrvoje Skenderović</a> i <a href="mailto:damirs@ifs.hr" target="_blank">Damir Starešinić</a></span></b></span></b></div></div><br><br></div></div></div></div><div data-marker="__QUOTED_TEXT__"><br></div></div></body></html>