Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-12-16
Phys. Rev. B 83, 235122 (2011)
Physics
Condensed Matter
Strongly Correlated Electrons
8 pages, 4 figures
Scientific paper
10.1103/PhysRevB.83.235122
Slave particle approaches are widely used in studies of exotic quantum phases. A complete description beyond mean field also contains dynamical gauge fields, while a simplified procedure considers Gutzwiller-projected trial states. We apply this in the context of bosonic models with ring exchanges realizing so-called Exciton Bose Liquid (EBL) phase and compare a Gutzwiller wave function against an accurate EBL wave function. We solve the parton-gauge theory and show that dynamical fluctuations of the spatial gauge fields are necessary for obtaining qualitatively accurate EBL description. On the contrary, just the Gutzwiller projection leads to a state with subtle differences in the long-wavelength properties, thus suggesting that Gutzwiller wave functions may generally fail to capture long-wavelength physics.
Motrunich Olexei I.
Tay Tiamhock
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