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UID:DSC-3219
DTSTART;TZID=Europe/Berlin:20120531T140000
SEQUENCE:1338449832
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20120531T150000
URL:https://www.dresden-science-calendar.de/calendar/en/detail/3219
LOCATION:MPI-PKS\, Nöthnitzer Straße 3801187 Dresden
SUMMARY:Chern: Orbital ice: An exact Coulomb phase on diamond optical latti
 ce
CLASS:PUBLIC
DESCRIPTION:Speaker: Gia-Wei Chern\nInstitute of Speaker: University of Wis
 consin - Madison\nTopics:\nPhysik\n Location:\n  Name: MPI-PKS (Room 1D1)\
 n  Street: Nöthnitzer Straße 38\n  City: 01187 Dresden\n  Phone: + 49 (0
 )351 871 0\n  Fax: \nDescription: Due to the interplay of orbital anisotro
 py and lattice geometry\, Optical cold atoms in higher orbital states prov
 ide a new playground for investigating strongly frustrated systems. A cano
 nical example of geometrical frustration is proton ordering in water ice. 
 Magnetic analog of ice was also found in rare-earth pyrochlore oxides know
 n as spin ice. In both cases\, there exists an emergent Coulomb phase whic
 h is characterized by algebraic dipolar-like correlations and a gauge stru
 cture resulting from the local constraints (ice rules) of the underlying l
 attice models. Here we demonstrate the existence of orbital Coulomb phase 
 as the exact many-body ground state of p-orbital exchange Hamiltonian on t
 he diamond lattice. Contrary to other ice models\, the orbital ice rules a
 re emergent phenomena resulting from the quantum orbital dynamics. We comp
 ute the orbital correlations in the Coulomb phase by exploiting an one-to-
 one mapping between the orbital-ice states and the spin-ice states obeying
  the 2-in-2-out constraints on the pyrochlore lattice.
DTSTAMP:20260522T084432Z
CREATED:20120523T073701Z
LAST-MODIFIED:20120531T073712Z
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