<html><body><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000"><div> Poštovani,<br></div><div><br></div><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;">Podsjećamo na DANAŠNJI seminar na IF-u koji će se održati u <span style="color: rgb(255, 0, 0);">I krilu</span> u 15 sati:<br><div><br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000" data-mce-style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000;"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000" data-mce-style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000;"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000" data-mce-style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000;"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000" data-mce-style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000;"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000" data-mce-style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000;"><div><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><b><span style="font-size: 12.0pt; color: black;" data-mce-style="font-size: 12.0pt; color: black;" lang="HR">18. prosinca 2014. (četvrtak) u 15:00 sati </span></b><span style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;" data-mce-style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;"></span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><span style="font-size: 12.0pt; color: black;" data-mce-style="font-size: 12.0pt; color: black;" lang="HR">Institut za fiziku, Bijenička cesta 46, predavaonica u <span style="color: rgb(255, 0, 0);">I krilu</span></span><span style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;" data-mce-style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;"></span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><span style="font-size: 12.0pt; color: black;" data-mce-style="font-size: 12.0pt; color: black;" lang="HR"> </span><b><span style="font-size: 16.0pt; color: black;" data-mce-style="font-size: 16.0pt; color: black;" lang="HR"> </span></b><span style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;" data-mce-style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;"></span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><b><span style="font-size: 16.0pt; color: black;" data-mce-style="font-size: 16.0pt; color: black;" lang="HR"><img src="cid:04db44a165756425143cad36916addbfd9912d7a@zimbra" data-mce-src="cid:04db44a165756425143cad36916addbfd9912d7a@zimbra"> </span></b></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><b><span style="font-size: 16.0pt; color: black;" data-mce-style="font-size: 16.0pt; color: black;" lang="HR"></span></b><b><span style="font-size: 16.0pt; color: black;" data-mce-style="font-size: 16.0pt; color: black;" lang="HR">Andrey S. Mishchenko</span></b><span style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;" data-mce-style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;"></span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><br></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;" align="center"><span style="font-family: arial,helvetica,sans-serif;" data-mce-style="font-family: arial,helvetica,sans-serif;" lang="EN-GB">RIKEN Center for Emergent Matter Science (CEMS), Japan</span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><span style="color: black;" data-mce-style="color: black;" lang="HR"></span><span style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;" data-mce-style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;"></span><b><span style="font-size: 16.0pt; color: black;" data-mce-style="font-size: 16.0pt; color: black;" lang="HR"> <br></span></b></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><span style="font-family: arial,helvetica,sans-serif;" data-mce-style="font-family: arial,helvetica,sans-serif;"><b><span style="font-size: 16pt; color: black;" data-mce-style="font-size: 16pt; color: black;" lang="HR"><b><span style="font-size: 20pt;" data-mce-style="font-size: 20pt;" lang="EN-GB">ARPES and optical conductivity of the Hubbard model with electron-boson coupling: equilibrium and pump-probe phenomena</span></b></span></b></span><span style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;" data-mce-style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;"></span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;" align="center"><b><span style="font-size: 16.0pt; color: black;" data-mce-style="font-size: 16.0pt; color: black;"> </span></b><span style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;" data-mce-style="font-size: 12.0pt; font-family: 'Arial','sans-serif'; color: black;"></span></p><p style="margin: 0px; text-align: justify; line-height: normal;" data-mce-style="margin: 0px; text-align: justify; line-height: normal;"><span style="font-size: 12.0pt; color: black;" data-mce-style="font-size: 12.0pt; color: black;" lang="HR"> </span></p><p>Angle resolved photoemission spectra (ARPES) [1,2] and optical conductivity (OC) [3,4] of the 2D Hubbard model with strong coupling to bosonic excitations are in good agreement with experiments on underdoped cuprates. Comparison with experiments shows that the effective strength of the electron-boson interaction is suppressed with doping. Analysis of the doping dependence of manifestations of the electron-boson interaction with novel many-polaron diagrammatic Monte Carlo method [5] shows that it is occurs because of suppression of the vertex corrections according to Migdal’s theorem. General analysis shows that the energy scales of electron-electron and electron-boson interactions are very similar and it is difficult to prove or disprove its relevance in the spectroscopic experiments with the systems in equilibrium. Hence, a pump-probe technique is an exclusive route to disentangle different interactions and evaluate its importance.</p><p>Time dynamics of the physical properties and OC of the 2D Hubbard-Holstein model is studied theoretically and experimentally when undoped system is put out of equilibrium by an ultrashort powerful light pulse [6,7]. It is shown that the ultra-fast dynamics of the underdoped cuprates can be explained only in case when strong electron-boson coupling is assumed.</p><p>[1] A. S. Mishchenko and N. Nagaosa, Phys. Rev. Lett. 93, 036402 (2004).<br>[2] A. S. Mishchenko et al, EPL 95, 57007 (2011).<br>[3] A. S. Mishchenko et al, Phys. Rev. Lett. 100, 166401 (2008).<br>[4] G. De Filippis et al, Phys. Rev. B 80, 195104 (2009).<br>[5] A. S. Mishchenko, N. Nagaosa and N. Prokof’ev, Phys. Rev. Lett. 113, 166402 (2014).<br>[6] G. De Filippis et al, Phys. Rev. Lett. 109, 176402 (2012).<br>[7] F. Novelli et al, Nature Comm. 5, 5112 (2014).</p><span style="color: black;" data-mce-style="color: black;" lang="HR"></span><span style="color: black;" data-mce-style="color: black;" lang="HR"></span><p style="margin: 0px; text-align: right; line-height: normal;" data-mce-style="margin: 0px; text-align: right; line-height: normal;" align="right"><span style="color: black;" data-mce-style="color: black;" lang="HR"> </span></p><p style="margin: 0px; text-align: right; line-height: normal;" data-mce-style="margin: 0px; text-align: right; line-height: normal;" align="right"><span style="color: black;" data-mce-style="color: black;" lang="HR">Voditelji seminara IF-a: Nikša Krstulović i Osor Barišić</span></p></div></div></div></div></div></div></div></div></div></div></div></div></body></html>