Its creation and annihilation operators can be replaced by their expectation values according to the Bogoliubov approximation.
Its creation and annihilation operators can be replaced by their expectation values according to the Bogoliubov approximation. The Thomas-Fermi approximation ignores the kinetic energy operator in the (*) Gross-Pitaevskii equation, which describes its zero-temperature properties. It involves the formation of a shared low energy quantum state of integer spin particles and was first observed in gaseous rubidium atoms. For 10 points, name this substance in which particles coalesce into a single quantum mechanical entity.
Its creation and annihilation operators can be replaced by their expectation values according to the Bogoliubov approximation.
{Bose}-{Einstein condensate} (or {BEC})