Measurements of Relative Phase and Quantum Beat Note Between Bose-Einstein Condensates

Published

August 1, 1998

Author(s)

D S. Hall, M R. Matthews, C E. Wieman, Eric A. Cornell

Abstract

We use a separated-oscillatory-field condensate interferometer to measure the time-evolution of the relative phase in a two-component Bose-Einstein condensate. The two components are created with a particular relative phase in the [F =2, m_f = 1] and [F = 1, m_f= -1] states of ⁸⁷Rb by applying a coupling pulse to a condensate in the [1, -1] state. The components subsequently separate spatially due to their mutual repulsion, damp their relative center-of-mass motion, and come into equilibrium after 45 ms. Meanwhile, the relative phase accumulates at 6.8 GHz and is measured with a second coupling pulse. We find that the coherence initially established between the components is perserved despite the motional damping present in this entangled system.

Proceedings Title

Proceedings of the 6th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology

Conference Dates

August 24-27, 1998

Conference Location

Saitama, 1, JA

Conference Title

Quantum Coherence and Decoherence

Pub Type

Conferences

Keywords

BEC, interferometer, quantum fluids

Citation

Hall, D. , Matthews, M. , Wieman, C. and Cornell, E. (1998), Measurements of Relative Phase and Quantum Beat Note Between Bose-Einstein Condensates, Proceedings of the 6th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, Saitama, 1, JA (Accessed October 12, 2025)