CMSP seminar @ICTP Stasi Rm Thursday 22 Feb. 11:00 - H.BULJAN

[CM Section]

ICTPCondensed Matter and Statistical Physics
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Thursday 22 February at 11:00 a.m.
Luigi Stasi Seminar Room, first floor, ICTP Leonardo building
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Speaker:Hrvoje BULJAN
(Dept. of Physics, University of Zagreb, Croatia)

Title:
Engineering Synthetic Gauge Fields, Weyl Semimetals and Anyons

Abstract. I will present two topics of research in our group related to
synthetic topological quantum matter [1]: (i) topological phases in 3D
optical lattices, more specifically a proposal for experimental realization
of Weyl semimetals in ultracold atomic gases [2], and (ii) anyons [3,4].
I will present one possible route to engineer anyons in a 2D electron gas
in a strong magnetic field sandwiched between materials with high magnetic
permeability, which induce electron-electron vector interactions to 
engineer
charged flux-tube composites [3]. I will also discuss intriguing concepts
related to extracting observables from anyonic wavefunctions [4]: one can
show that the momentum distribution is not a proper observable for a system
of anyons [4], even though this observable was crucial for the experimental
demonstration of Bose-Einsten condensation or ultracold fermions in time of
flight measurements. I will show how time of flight measurements can be
used to extract anyonic statistics [4].


[1] N. Goldman, G. Juzeliunas, P. Ohberg, I. B. Spielman, Rep. Prog. 
Phys. 77,
126401 (2014).
[2] Tena Dubcek, Colin J. Kennedy, Ling Lu, Wolfgang Ketterle, Marin 
Soljacic,
Hrvoje Buljan, /Weyl points in three-dimensional optical lattices: 
Synthetic magnetic
monopoles in momentum space/, Phys. Rev. Lett. 114, 225301 (2015).
[3] M. Todoric, D. Jukic, D. Radic, M. Soljacic, and H. Buljan, /The 
Quantum Hall
Effect with Wilczek's charged magnetic flux tubes instead of electrons/,
arXiv:1710.10108 [cond-mat.str-el]
[4] Tena Dubcek, Bruno Klajn, Robert Pezer, Hrvoje Buljan, Dario Jukic,
/Quasimomentum distribution and expansion of an anyonic gas/, Phys. Rev. 
A 97,
011601(R) (2018)