Stability of continuously pumped atom lasers |
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Authors: | Haine S A Hope J J Robins N P Savage C M |
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Institution: | Department of Physics and Theoretical Physics, Australian National University, ACT 0200, Australia. |
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Abstract: | A multimode model of a continuously pumped atom laser is shown to be unstable below a critical value of the scattering length. Above the critical scattering length, the atom laser reaches a steady state, the stability of which increases with pumping. Below this limit the laser does not reach a steady state. This instability results from the competition between gain and loss for the excited states of the lasing mode. It will determine a fundamental limit for the linewidth of an atom laser beam. |
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