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Science 25 March 2005:
Vol. 307. no. 5717, pp. 1945 - 1948
DOI: 10.1126/science.1108801
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Reports

Light Scattering to Determine the Relative Phase of Two Bose-Einstein Condensates

M. Saba,* T. A. Pasquini, C. Sanner, Y. Shin, W. Ketterle, D. E. Pritchard

We demonstrated an experimental technique based on stimulated light scattering to continuously sample the relative phase of two spatially separated Bose-Einstein condensates of atoms. The phase measurement process created a relative phase between two condensates with no initial phase relation, read out the phase, and monitored the phase evolution. This technique was used to realize interferometry between two trapped Bose-Einstein condensates without need for splitting or recombining the atom cloud.

Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

* To whom correspondence should be addressed. E-mail: msaba{at}mit.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)