Quantum Monte Carlo study of long-range spin-1 chains finds unconventional quantum criticality at alpha_c = 2.48(2) with dynamic exponent z not equal to 1, characterized via entanglement entropy and bipartite fluctuations.
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Two coupled frustrated Haldane chains show an extended Ashkin-Teller quantum phase transition separating a plaquette phase from a uniform disordered phase, with connections to Haldane and dimerized phases via Gaussian and Ising transitions.
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Unconventional Quantum Criticality in Long-Range Spin-1 Chains: Insights from Entanglement Entropy and Bipartite Fluctuations
Quantum Monte Carlo study of long-range spin-1 chains finds unconventional quantum criticality at alpha_c = 2.48(2) with dynamic exponent z not equal to 1, characterized via entanglement entropy and bipartite fluctuations.
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Extended Ashkin-Teller transition in two coupled frustrated Haldane chains
Two coupled frustrated Haldane chains show an extended Ashkin-Teller quantum phase transition separating a plaquette phase from a uniform disordered phase, with connections to Haldane and dimerized phases via Gaussian and Ising transitions.