Ground-state quantum Monte Carlo calculations demonstrate scale invariance of the polaron energy at the Mott-superfluid critical point in a lattice Bose gas and extract an unexplained scaling exponent.
Vojta, Quantum phase transitions, Reports on Progress in Physics66, 2069 (2003)
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Scale invariance of the polaron energy at the Mott-superfluid critical point
Ground-state quantum Monte Carlo calculations demonstrate scale invariance of the polaron energy at the Mott-superfluid critical point in a lattice Bose gas and extract an unexplained scaling exponent.