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.

arXiv comment8 pages, 8 figures, improved on basis of referee comments

References in corpus (20)

• Quantum degenerate two-species Fermi-Fermi mixture coexisting with a Bose-Einstein condensate
• 39-K Bose-Einstein condensate with tunable interactions
• Rapid production of ${}^{87}$Rb BECs in a combined magnetic and optical potential
• Quantum-degenerate mixture of fermionic lithium and bosonic rubidium gases
• All-optical runaway evaporation to Bose-Einstein condensation
• Frequency-dependent polarizabilities of alkali atoms from ultraviolet through infrared spectral regions
• Optimizing the efficiency of evaporative cooling in optical dipole traps
• A Bose-condensed, simultaneous dual species Mach-Zehnder atom interferometer
• A high phase-space density mixture of ${}^{87}$Rb and ${}^{133}$Cs: towards ultracold heteronuclear molecules
• Magic wavelengths for the $2{}^{3}S\to 2{}^{1}S$ transition in helium
• Bose-Einstein condensation of 87Rb in a levitated crossed dipole trap
• A simple and efficient all-optical production of spinor condensates
• Ultracold Thermalization of ${}^7$Li and ${}^{87}$Rb
• Bose-Einstein condensation of 85Rb by direct evaporation in an optical dipole trap
• A simple method for generating Bose-Einstein condensates in a weak hybrid trap
• Ultracold mixtures of metastable He and Rb: scattering lengths from ab initio calculations and thermalization measurements
• A two-frequency acousto-optic modulator driver to improve the beam pointing stability during intensity ramps
• Observations of $\lambda /4$ structure in a low-loss radiofrequency-dressed optical lattice
• Production of a rubidium Bose-Einstein condensate in a hybrid trap with light induced atom desorption
• A compact single-chamber apparatus for Bose-Einstein condensation of ${}^{8}7$Rb

Cited by in corpus (6)

• Production of large Bose-Einstein condensates in a magnetic-shield-compatible hybrid trap
• Quantum-State Controlled Penning Ionization Reactions between Ultracold Alkali and Metastable Helium Atoms
• An ultracold, optically trapped mixture of {87}Rb and metastable {4}He atoms
• Simple method for producing Bose-Einstein condensates of metastable helium using a single beam optical dipole trap
• 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