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• W2018434516 abstract "We study in detail the relation between the two-dimensional Euclidean dynamical E(2) symmetry and the quantum phase transition in the two-dimensional limit of the vibron model, called the U(3) vibron model. Both geometric and algebraic descriptions of the U(3) vibron model show that structures of low-lying states at the critical point of the model with a quartic potential as its classical limit can be approximately described by the E(2) symmetry. We also fit the finite-size scaling exponent of the energy levels and E1 transition rates in the F(2) model, which is exactly the E(2) model but with truncation in its Hilbert subspace, as well as those at the critical point in the U(3) vibron model. The N-scaling power law around the critical point shows that the E(2) symmetry is well preserved even for cases with finite number of bosons. In addition, two kinds of experimentally accessible effective order parameters, such as the energy ratios and E1 transition ratios , , are proposed to identify the second-order phase transition in such systems. Possible empirical examples exhibiting approximate E(2) symmetry are also presented." @default.
• W2018434516 created "2016-06-24" @default.
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• W2018434516 date "2010-10-29" @default.
• W2018434516 modified "2023-10-16" @default.
• W2018434516 title "The<i>E</i>(2) symmetry and quantum phase transition in the two-dimensional limit of the vibron model" @default.
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• W2018434516 doi "https://doi.org/10.1088/0953-4075/43/22/225101" @default.
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