ПРЕДАВЊЕ: Владан Вулетић

У уторак, 27. марта у 13.30 часова у читаоници библиотеке „Др Драган Поповић“ Др Владан Вулетић са Департмана за физику МИТ-а одржаће предавање

„Laser cooling of Rb to Bose-Einstein condensation“

АПСТРАКТ:

The procedure for attaining quantum degeneracy in atomic gases almost exclusively rely on a final evaporative cooling, a time-consuming step associated with substantial atom loss. We demonstrate direct laser cooling of a gas of 87Rb atoms to quantum degeneracy. The method is fast and induces little atom loss. The atoms are trapped in a two-dimensional optical lattice that enables cycles of compression to increase the density followed by Raman sideband cooling to decrease the temperature. From a starting number of 2000 atoms, 1400 atoms reach quantum degeneracy in 300 milliseconds, as confirmed by a bimodal velocity distribution. The method should be broadly applicable to many bosonic and fermionic species and to systems where evaporative cooling is not possible.

buz lazer elektronik sigara izmir escort Denemebonusuz.com Wonmania8.com adana escort görükle escort halkalı escort