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4 papers · 2 filters
Valence-bond theory of highly disordered quantum antiferromagnets
S. Zhou, J. A. Hoyos, V. Dobrosavljevic +1
We present a large-N variational approach to describe the magnetism of insulating doped semiconductors based on a disorder-generalization of the resonating-valence-bond theory for…
The discontinuous nature of the exchange-correlation functional -- critical for strongly correlated systems
Paula Mori-Sanchez, Aron J. Cohen, Weitao Yang
Standard approximations for the exchange-correlation functional have been found to give big errors for the linearity condition of fractional charges, leading to delocalization erro…
Infinite-randomness quantum critical points induced by dissipation
Thomas Vojta, Chetan Kotabage, J. A. Hoyos
We develop a strong-disorder renormalization group to study quantum phase transitions with continuous O symmetry order parameters under the influence of both quenched disorder…
Theory of smeared quantum phase transitions
J. A. Hoyos, Thomas Vojta
We present an analytical strong-disorder renormalization group theory of the quantum phase transition in the dissipative random transverse-field Ising chain. For Ohmic dissipation,…