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The Bogoliubov Theory of a BEC in Particle Representation

Jacek Dziarmaga·Krzysztof Sacha
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Abstract

In the number-conserving Bogoliubov theory of BEC the Bogoliubov transformation between quasiparticles and particles is nonlinear. We invert this nonlinear transformation and give general expression for eigenstates of the Bogoliubov Hamiltonian in particle representation. The particle representation unveils structure of a condensate multiparticle wavefunction. We give several examples to illustrate the general formalism.

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Jacek Dziarmaga, Krzysztof Sacha. 2003-01-30. The Bogoliubov Theory of a BEC in Particle Representation. https://doi.org/10.1103/physreva.67.033608

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