Atom-chip Bose-Einstein condensation in a portable vacuum cell
- Department of Physics and JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440 (United States)
- Photonics Research Department, Core Technology Development Group, MSNC, Sony Corporation, Tokyo 141-0001 (Japan)
- Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309-0427 (United States)
- Max-Planck-Institut fuer Quantenoptik and Sektion Physik der Ludwig-Maximilians-Universitaet, Schellingstrasse 4, D-80799 Munich (Germany)
A {sup 87}Rb Bose-Einstein condensate (BEC) is produced in a portable atom-chip system less than 30x30x15 cm, where the ultrahigh vacuum is maintained by a small, 8 L/s, ion pump and nonevaporable getter. An aluminum nitride chip with lithographically patterned copper is used to seal the vacuum system, provide the electrical feedthroughs, and create the magnetic trap potentials. All cooling and trapping processes occur 0.6-2.5 mm from ambient laboratory air. A condensate of about 2000 {sup 87}Rb atoms in F=2,m{sub F}=2 is achieved after 4.21 s of rf forced evaporation. A magneto-optical trap lifetime of 30 s indicates the vacuum near the chip surface is about 10{sup -10} torr. This work suggests that a chip-based BEC-compatible vacuum system can occupy a volume of less than 0.5 L.
- OSTI ID:
- 20646254
- Journal Information:
- Physical Review. A, Vol. 70, Issue 5; Other Information: DOI: 10.1103/PhysRevA.70.053606; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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