Realisation and characterisation of the BEC for 87Rb atoms

الملخص EN

The Bose-Einstein condensate (BEC) created in a magnetic trap in the Quadrupole-Ioffe configuration (QUIC).

This kind of trap combines an anti-Helmholtz quadrupole field with an offset field produced by a single coil perpendicular to the quadrupole field axis to suppress Majorana transitions.

In the quadrupole trap, evaporative cooling is performed by using radio frequency, reaching the phase transition to a BEC in the QUIC trap.

By using Time of Flight (TOF) technique, the expansion velocity is measured with υx = (5.98 ± 0.08)mm/s and υy = (5.78 ± 0.07)mm/s which lead to temperature of Tx = (374 ± 7)nK and Ty = (350 ±5)nK.

It is roughly around the recoil temperature.