Artículo
Continuous unitary transformations in two-level boson systems
Autor/es | Dusuel, Sébastien
Vidal, Julien Arias Carrasco, José Miguel Dukelsky, Jorge García Ramos, José Enrique |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2005-12-01 |
Fecha de depósito | 2017-07-07 |
Publicado en |
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Resumen | Two-level boson systems displaying a quantum phase transition from a spherical (symmetric) to a deformed (broken) phase are studied. A formalism to diagonalize Hamiltonians with O(2L+1) symmetry for large
number ... Two-level boson systems displaying a quantum phase transition from a spherical (symmetric) to a deformed (broken) phase are studied. A formalism to diagonalize Hamiltonians with O(2L+1) symmetry for large number of bosons is worked out. Analytical results beyond the simple mean-field treatment are deduced by using the continuous unitary transformations technique. In this scheme, a 1/N expansion for different observables is proposed and allows one to compute the finite-size scaling exponents at the critical point. Analytical and numerical results are compared and reveal the power of the present approach to compute the finite-size corrections in sucha context. |
Agencias financiadoras | Ministerio de Educación y Ciencia (MEC). España |
Identificador del proyecto | FIS2005-01105
BFM2003-05316-C02-02 BFM2003-05316 FPA2003-05958 |
Cita | Dusuel, S., Vidal, J., Arias Carrasco, J.M., Dukelsky, J. y García Ramos, J.E. (2005). Continuous unitary transformations in two-level boson systems. Physical Review C - Nuclear Physics, 72 (6), 064332-1-064332-17. |
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