Experimental study of the thermodynamics of an interacting trapped Bose-Einstein condensed gas Export

@article{citeulike:2151374, abstract = {We have investigated experimentally the finite-temperature properties of a Bose-Einstein condensed cloud of 87Rb atoms in a harmonic trap. Focusing primarily on condensed fraction and expansion energy, we measure unambiguous deviations from ideal-gas thermodynamics and obtain good agreement with a Hartree-Fock description of the mixed cloud. Our results offer clear evidence of the mutual interaction between the condensed and thermal components. To probe the low-temperature region unaccessible to the usual time-of-flight technique, we use coherent Bragg scattering as a filtering technique for the condensate. This allows us to separate spatially the condensed and normal components in time of flight and to measure reliably temperatures as low as 0.2Tc0" align="middle"> and thermal fractions as low as 10\%. Finally, we observe evidence for the limitations of the usual image analysis procedure, pointing out to the need for a more elaborate model of the expansion of the mixed cloud.}, author = {Gerbier, F. and Thywissen, J. H. and Richard, S. and Hugbart, M. and Bouyer, P. and Aspect, A.}, citeulike-article-id = {2151374}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLRAAN000070000001013607000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRA/v70/e013607}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevA.70.013607}, citeulike-linkout-3 = {http://link.aps.org/abstract/PRA/v70/i1/e013607}, citeulike-linkout-4 = {http://link.aps.org/pdf/PRA/v70/i1/e013607}, doi = {10.1103/PhysRevA.70.013607}, journal = {Physical Review A (Atomic, Molecular, and Optical Physics)}, keywords = {bec, bose-gas, hartree-fock, interactions}, number = {1}, posted-at = {2007-12-20 11:58:43}, priority = {2}, publisher = {APS}, title = {Experimental study of the thermodynamics of an interacting trapped Bose-Einstein condensed gas}, url = {http://dx.doi.org/10.1103/PhysRevA.70.013607}, volume = {70}, year = {2004} }

TY - JOUR ID - citeulike:2151374 L3 - citeulike-article-id:2151374 N2 - We have investigated experimentally the finite-temperature properties of a Bose-Einstein condensed cloud of 87Rb atoms in a harmonic trap. Focusing primarily on condensed fraction and expansion energy, we measure unambiguous deviations from ideal-gas thermodynamics and obtain good agreement with a Hartree-Fock description of the mixed cloud. Our results offer clear evidence of the mutual interaction between the condensed and thermal components. To probe the low-temperature region unaccessible to the usual time-of-flight technique, we use coherent Bragg scattering as a filtering technique for the condensate. This allows us to separate spatially the condensed and normal components in time of flight and to measure reliably temperatures as low as 0.2Tc0" align="middle"> and thermal fractions as low as 10%. Finally, we observe evidence for the limitations of the usual image analysis procedure, pointing out to the need for a more elaborate model of the expansion of the mixed cloud. IS - 1 JF - Physical Review A (Atomic, Molecular, and Optical Physics) TI - Experimental study of the thermodynamics of an interacting trapped Bose-Einstein condensed gas PB - APS VL - 70 KW - bec KW - bose-gas KW - hartree-fock KW - interactions AU - Gerbier, F AU - Thywissen, JH AU - Richard, S AU - Hugbart, M AU - Bouyer, P AU - Aspect, A PY - 2004/// UR - http://dx.doi.org/10.1103/PhysRevA.70.013607 ER -