The phase diagram of the one-dimensional Bose-Hubbard model describing interacting bosons in optical lattice is investigated with the variational approach. This method can also be generalized to the two-dimensional case.
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Univ Fed Rio Grande do Sul, Inst Fis, Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Fis, Porto Alegre, RS, Brazil
Rizzatti, Eduardo Osorio
Gomes Filho, Marcio Sampaio
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Univ Brasilia, Inst Fis, Brasilia, DF, BrazilUniv Fed Rio Grande do Sul, Inst Fis, Porto Alegre, RS, Brazil
Gomes Filho, Marcio Sampaio
Malard, Mariana
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Univ Brasilia, Fac UnB Planaltina, Programs Posgrad Ciencia Mat, Planaltina, DF, BrazilUniv Fed Rio Grande do Sul, Inst Fis, Porto Alegre, RS, Brazil
Malard, Mariana
Barbosa, Marco Aurelio A.
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Univ Brasilia, Fac UnB Planaltina, Programs Posgrad Ciencia Mat, Planaltina, DF, BrazilUniv Fed Rio Grande do Sul, Inst Fis, Porto Alegre, RS, Brazil