Physics – Condensed Matter – Quantum Gases
Scientific paper
2012-02-13
J. Phys. A: Math. Theor. 45 (2012) 155202
Physics
Condensed Matter
Quantum Gases
14 pages, 4 figures, submitted to J. Phys. A
Scientific paper
10.1088/1751-8113/45/15/155202
We apply transition state theory to coupled Gaussian wave packets and calculate thermal decay rates of Bose-Einstein condensates with additional long-range interaction. The ground state of such a condensate is metastable if the contact interaction is attractive and a sufficient thermal excitation may lead to its collapse. The use of transition state theory is made possible by describing the condensate within a variational framework and locally mapping the variational parameters to classical phase space as has been demonstrated in the preceding paper [A. Junginger, J. Main, and G. Wunner, submitted to J. Phys. A]. We apply this procedure to Gaussian wave packets and present results for condensates with monopolar 1/r-interaction comparing decay rates obtained by using different numbers of coupled Gaussian trial wave functions as well as different normal form orders.
Dorwarth Markus
Junginger Andrej
Main Jörg
Wunner Günter
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