215 citations
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cond-mat.str-el2005★ 38 cited
Systematic Derivation of Order Parameters through Reduced Density Matrices
Shunsuke Furukawa, Gregoire Misguich, Masaki Oshikawa
A systematic method for determining order parameters for quantum many-body systems on lattices is developed by utilizing reduced density matrices. This method allows one to extract…
cond-mat.str-el2005★ 20 cited
Decay and coherence of two-photon excited yellow ortho-excitons in Cu2O
K. Karpinska, M. Mostovoy, M. A. van der Vegte +2
Photoluminescence excitation spectroscopy has revealed a novel, highly efficient two-photon excitation method to produce a cold, uniformly distributed high density excitonic gas in…
cond-mat.str-el2003★ 40 cited
Determination of the exchange energies in Li2VOSiO4 from a high-temperature series analysis of the square lattice J1-J2 Heisenberg model
G. Misguich, B. Bernu, L. Pierre
We present a high-temperature expansion (HTE) of the magnetic susceptibility and specific heat data of Melzi et al. on Li2VOSiO4 [Phys. Rev. B 64, 024409 (2001)]. The data are very…