A new QMC estimator shows diverging superfluid density in the long-range 1d XY model as the interaction exponent alpha approaches zero.
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In the variable-range Ising model, correlations are algebraic up to distance Z then exponential, while entanglement scales as Z^{-γ} at criticality independent of partition size and α>1.
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Superfluidity in the spin-1/2 XY model with power-law interactions
A new QMC estimator shows diverging superfluid density in the long-range 1d XY model as the interaction exponent alpha approaches zero.
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Scaling of entanglement entropy and correlations in the variable-range extended Ising model
In the variable-range Ising model, correlations are algebraic up to distance Z then exponential, while entanglement scales as Z^{-γ} at criticality independent of partition size and α>1.