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Production of Two Overlapping Bose-Einstein Condensates by Sympathetic Cooling

C. J. Myatt

JILA, Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

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E. A. Burt

JILA, Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

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R. W. Ghrist

JILA, Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

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E. A. Cornell

JILA, Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

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, and

C. E. Wieman

JILA, Joint Institute for Laboratory Astrophysics, University of Colorado, 440 UCB, Boulder, CO 80309-0440, USA

Department of Physics, University of Colorado, Boulder, Colorado 80309, USA

National Institute of Standards and Technology, 100 Bureau Drive, Stop 1070, Gaithersburg, MD 20899-1070, USA

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https://doi.org/10.1142/9789812813787_0066Cited by:1 (Source: Crossref)

Abstract:

A new apparatus featuring a double magneto-optic trap and an Ioffe-type magnetic trap was used to create condensates of 2 × 10⁶ atoms in either of the |F = 2, m = 2〉 spin states of ⁸⁷Rb. Overlapping condensates of the two states were also created using nearly lossless sympathetic cooling of one state via thermal contact with the other evaporatively cooled state. We observed that (i) the scattering length of the |1, −1〉 state is positive, (ii) the rate constant for binary inelastic collisions between the two states is 2.2(9) × 10⁻¹⁴cm³/s, and (iii) there is a repulsive interaction between the two condensates. Similarities and differences between the behaviors of the two spin states are observed. [S0031-9007(96)02208-9]

PACS: 03.75.Fi, 05.30.Jp, 32.80.Pj, 51.30.+i

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Production of Two Overlapping Bose-Einstein Condensates by Sympathetic Cooling

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