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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-2311
DTSTART:20110926T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260311T042704Z
LAST-MODIFIED:20111103T170810Z
LOCATION:5310 Chamberlin
SUMMARY:Orbital ice: an exact Coulomb phase on diamond lattice\, Conde
 nsed Matter Theory Group Seminar\, Gia-Wei Chern\, UW-Madison
DESCRIPTION:I will talk about an exact orbital Coulomb phase which is 
 an exact ground state of p-orbital exchange Hamiltonian on the diamond
  lattice. The Coulomb phase is an emergent state characterized by alge
 braic dipolar-like correlations and a gauge structure resulting from t
 he local constraints (ice rules) of the underlying lattice models. For
  most ice models on the pyrochlore lattice\, these local constraints a
 re a direct consequence of minimizing the energy of each individual te
 trahedron. On the contrary\, the orbital ice rules are emergent proper
 ties arising from the quantum orbital dynamics. We show that there exi
 sts a one-to-one mapping between the orbital-ice states and the spin-i
 ce states obeying the 2-in-2-out constraints on the pyrochlore lattice
 . We also discuss possible realization of the orbital ice model in opt
 ical lattices with p-band fermionic cold atoms. 
URL:https://www.physics.wisc.edu/events/?id=2311
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