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SUMMARY:Liquid-crystalline states of ultracold atomic systems - Sarang Gop
 alakrishnan
DTSTART:20160623T131500Z
DTEND:20160623T141500Z
UID:TALK66598@talks.cam.ac.uk
CONTACT:Gareth Conduit
DESCRIPTION:Classical soft-matter systems exhibit a wealth of spatially or
 dered states (e.g.\, liquid crystals and quasicrystals)\, while solid-stat
 e quantum systems offer a similar variety of internal ordering (e.g.\, mag
 netism and superfluidity). I shall describe how ultracold atomic systems c
 an be induced\, via dispersion-engineering [1]\, to develop both forms of 
 order at once -- giving rise to quantum crystalline\, liquid-crystalline\,
  and quasicrystalline states [2] -- and how these "intertwined-order" stat
 es support hybrid spatial and internal defects (in particular\, vortices b
 ound to disclinations)\, the unbinding of which gives rise to novel two-di
 mensional melting transitions [3]. If time permits\, I will discuss realiz
 ations of states with "vestigial" order [4] in cold-atom systems coupled t
 o optical cavities [5].\n\n[1] S. Gopalakrishnan\, C.V. Parker\, and E. De
 mler\, Phys. Rev. Lett. 114\, 045301 (2015)\n\n[2] S. Gopalakrishnan\, I. 
 Martin\, and E. Demler\, Phys. Rev. Lett. 111\, 185304 (2013)\n\n[3] S. Go
 palakrishnan\, J.C.Y. Teo\, and T.L. Hughes\, Phys. Rev. Lett. 111\, 02530
 4 (2013)\n\n[4] L. Nie\, G. Tarjus\, and S.A. Kivelson. PNAS 111\, 7980 (2
 014)\n\n[5] S. Gopalakrishnan and E. Demler (in preparation)
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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