Efficient production of an 87Rb F = 2, mF = 2 Bose-Einstein condensate in a hybrid trap

Abstract

We have realized Bose-Einstein condensation (BEC) of 87Rb in the F=2, m_F=2 hyperfine substate in a hybrid trap, consisting of a quadrupole magnetic field and a single optical dipole beam. The symmetry axis of the quadrupole magnetic trap coincides with the optical beam axis, which gives stronger axial confinement than previous hybrid traps. After loading 2x10^6 atoms at 14 muK from a quadrupole magnetic trap into the hybrid trap, we perform efficient forced evaporation and reach the onset of BEC at a temperature of 0.5 muK and with 4x10^5 atoms. We also obtain thermal clouds of 1x10^6 atoms below 1 muK in a pure single beam optical dipole trap, by ramping down the magnetic field gradient after evaporative cooling in the hybrid trap.

8 pages, 8 figures, improved on basis of referee comments

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Cited by in corpus (3)

• Quantum-State Controlled Penning Ionization Reactions between Ultracold Alkali and Metastable Helium Atoms
• Compact setup for the production of ${}^{87}$Rb $|F=2,m_F=+2⟩$ Bose-Einstein condensates in a hybrid trap
• The search for NLS ground states on a hybrid domain: Motivations, methods, and results