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- W3098455816 abstract "We analyze in detail the quantum phase transitions that arise in models based on the $u(2)$ algebraic description for bosonic systems with two types of scalar bosons. First we discuss the quantum phase transition that occurs in hamiltonians that admix the two dynamical symmetry chains $u(2)supset u(1)$ and $u(2)supset so(2)$ by diagonalizing the problem exactly in the $u(1)$ basis. Then we apply the coherent state formalism to determine the energy functional. Finally we show that a quantum phase transition of a different nature, but displaying similar characteristics, may arise also within a single chain just by including higher order terms in the hamiltonian." @default.
- W3098455816 created "2020-11-23" @default.
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- W3098455816 date "2010-10-01" @default.
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- W3098455816 title "Detailed Analysis of Quantum Phase Transitions Within the<i>u</i>(2) Algebra" @default.
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- W3098455816 doi "https://doi.org/10.1088/0253-6102/54/4/01" @default.
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