All-Optical Production of Chromium Bose-Einstein Condensates

Abstract

We report on the production of ^52Cr Bose Einstein Condensates (BEC) with an all-optical method. We first load 5.10^6 metastable chromium atoms in a 1D far-off-resonance optical trap (FORT) from a Magneto Optical Trap (MOT), by combining the use of Radio Frequency (RF) frequency sweeps and depumping towards the ^5S_2 state. The atoms are then pumped to the absolute ground state, and transferred into a crossed FORT in which they are evaporated. The fast loading of the 1D FORT (35 ms 1/e time), and the use of relatively fast evaporative ramps allow us to obtain in 20 s about 15000 atoms in an almost pure condensate.

4 pages, 4 figures

References in corpus (8)

• Bose-Einstein condensation of chromium
• Strong dipolar effects in a quantum ferrofluid
• Observation of dipole-dipole interaction in a degenerate quantum gas
• Stabilizing a purely dipolar quantum gas against collapse
• Comparing contact and dipolar interaction in a Bose-Einstein condensate
• Bose-Einstein Condensation of an Ytterbium Isotope
• Spinor condensates with a laser-induced quadratic Zeeman effect
• Accumulation of chromium metastable atoms into an Optical Trap

Cited by in corpus (10)

• All-Optical Formation of Quantum Degenerate Mixtures
• Stability of dark solitons in three dimensional dipolar Bose-Einstein condensates
• Structure formation during the collapse of a dipolar atomic Bose-Einstein condensate
• Vortices in dipolar condensates with dominant dipolar interactions
• Scattering resonances and two-particle bound states of the extended Hubbard model
• A Feshbach resonance in d-wave collisions
• Cold atoms in double-well optical lattices
• Radio-frequency induced ground state degeneracy in a Chromium Bose-Einstein condensate
• The influence of optical molasses in loading a shallow optical trap
• Stability of the density-wave state of a dipolar condensate in a pancake trap