The a.c. and d.c. Josephson effects in a Bose–Einstein condensate

S. Levy, E. Lahoud, I. Shomroni and J. Steinhauer ()
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S. Levy: Technion—Israel Institute of Technology, Technion City, Haifa 32000, Israel
E. Lahoud: Technion—Israel Institute of Technology, Technion City, Haifa 32000, Israel
I. Shomroni: Technion—Israel Institute of Technology, Technion City, Haifa 32000, Israel
J. Steinhauer: Technion—Israel Institute of Technology, Technion City, Haifa 32000, Israel

Nature, 2007, vol. 449, issue 7162, 579-583

Abstract: A busy junction Josephson effects, in which currents 'tunnel' across a thin insulating barrier, were first discovered in a system of two superconductors, the macroscopic wavefunctions of which are weakly coupled via a tunnelling barrier. Bose–Einstein condensates (BECs) are also expected to support Josephson effects, but a clear observation remained elusive. Levy et al. now report the observation of a.c. and d.c. Josephson effects in a single BEC Josephson junction. The system may be suitable for use as an analogue of the superconducting quantum interference device (SQUID), able to sense rotation.

Date: 2007
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DOI: 10.1038/nature06186

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