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BEGIN:VEVENT
DTSTAMP:20260828T010908Z
LAST-MODIFIED:20141110T140706Z
DTSTART:20141121T150000Z
DTEND:20141121T160000Z
UID:event1333@bu.edu
URL:http://physics.bu.edu/internal/events/show/1333
SUMMARY:Quantum Simulations with Ultracold Atoms and Ions: Beyond Standard 
	Optical Lattices
DESCRIPTION:Featuring Prof. Walter Hofstetter\, Goethe University\, Frankfu
	rt\nHosted by: Anatoli Polkovnikov\n\nPart of the Condensed Matter Theory S
	eminar Series.\n\nAbstract:\nRecent years have witnessed dramatic progress 
	in experimental control and refinement of quantum simulations  \nbased on u
	ltracold atoms. Particularly rich many-body physics arises in the presence 
	of multiple atomic or ionic species\, \nartificial gauge fields and strong 
	interactions\, which I will highlight for the following examples:\n\n1) We 
	propose and theoretically investigate a hybrid system composed of a crystal
	 of trapped ions coupled to \nultracold fermions. This system combines the 
	advantages of scalability and tunability of ultracold atoms with \nthe high
	 fidelity operations and detection offered by trapped ions. It also feature
	s close analogies to natural solid-state systems\, \nas the atomic degrees 
	of freedom couple to phonons of the ion lattice. \nWe derive the effective 
	low energy Hamiltonian and discuss possible experimental scenarios   \nsuch
	 as a Peierls-like transition into a dimerized state.\n\n2) Recent experime
	nts in ultracold atoms and photonic analogs have reported the implementatio
	n of artificial gauge fields in lattice systems\, facilitating the realizat
	ion of topological phases. We investigate the Haldane honeycomb lattice tig
	ht-binding model\, for bosons with local interactions at filling one. We an
	alyze the ground state phase diagram and uncover three distinct phases: a u
	niform superfluid (SF)\, a chiral superfluid (CSF) and a plaquette Mott ins
	ulator with local current loops (PMI). \n\n3) We study finite-temperature m
	agnetic phases of three-component mixtures of ultracold fermions with repul
	sive interactions in optical lattices with simple cubic or square geometry 
	by means of dynamical mean-field theory (DMFT). We focus on the case of one
	 particle per site at moderate interaction strength\, where we observe a se
	quence of thermal phase transitions into two- and three-sublattice ordered 
	states. We find that long-range ordering in three-component mixtures should
	 be observable at comparable temperatures as in two-component mixtures.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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