Volume 81, Number 5, March 2008
Article Number 56004
Number of page(s) 5
Section Condensed Matter: Structural, Mechanical and Thermal Properties
Published online 19 February 2008
EPL, 81 (2008) 56004
DOI: 10.1209/0295-5075/81/56004

Bose-Einstein condensation on a superconducting atom chip

C. Roux1, A. Emmert1, A. Lupascu1, T. Nirrengarten1, G. Nogues1, M. Brune1, J.-M. Raimond1 and S. Haroche1, 2

1  Laboratoire Kastler Brossel, ENS, UPMC, CNRS - 24 rue Lhomond, 75005 Paris, France
2  Collège de France - 11 place Marcelin Berthelot, 75005 Paris, France

received 4 December 2007; accepted in final form 18 January 2008; published March 2008
published online 19 February 2008

We have produced a Bose-Einstein condensate (BEC) on an atom chip using only superconducting wires in a cryogenic environment. We observe the onset of condensation for 1$\cdot$104 atoms at a temperature of 100 nK. This result opens the way for studies of atom losses and decoherence in a BEC interacting with a superconducting surface. Studies of dipole-blockade with long-lived Rydberg atoms in a small and dense atomic sample are underway.

67.85.-d - Ultracold gases, trapped gases.
37.10.Gh - Atom traps and guides.
03.75.Gg - Entanglement and decoherence in Bose-Einstein condensates.

© EPLA 2008