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- W1968584071 abstract "We show that the spatial dimensionality of the quantum critical point associated with Bose--Einstein condensation at $T=0$ is reduced when the underlying lattice comprises a set of layers coupled by a frustrating interaction. For this purpose, we use an heuristic mean field approach that is complemented and justified by a more rigorous renormalization group analysis. Due to the presence of an emergent symmetry, i.e., a symmetry of the ground state that is absent in the underlying Hamiltonian, a three-dimensional interacting Bose system undergoes a chemical potential tuned quantum phase transition that is strictly two-dimensional. Our theoretical predictions for the critical temperature as a function of the chemical potential correspond very well with recent measurements in ${mathrm{BaCuSi}}_{2}{mathrm{O}}_{6}$." @default.
- W1968584071 created "2016-06-24" @default.
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- W1968584071 date "2008-03-06" @default.
- W1968584071 modified "2023-09-27" @default.
- W1968584071 title "Emergent symmetry and dimensional reduction at a quantum critical point" @default.
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- W1968584071 doi "https://doi.org/10.1103/physrevb.77.094406" @default.
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