Physics – Condensed Matter
Scientific paper
2000-02-03
Physics
Condensed Matter
7 pages, 3figures
Scientific paper
10.1103/PhysRevA.64.033611
Instabilities for boson-fermion mixed condensates of trapped Alkali atoms due to the boson-fermion attractive interaction are studied using a variational method. Three regions are shown for their instabilities according to the boson-fermion interaction strength: stable, meta-stable and unstable ones. The stability condition is obtained analytically from the asymptotic expansion of the variational total energy. The life-time of metastable states is discussed for tunneling decay, and is estimated to be very long. It suggests that, except near the unstable border, meta-stable mixed condensate should be almost-stable against clusterizations. The critical border between meta-stable and unstable phases is calculated numerically and is shown to be consistent with the M{\o}lmer scaling condition.
Miyakawa Takahiko
Suzuki Toshiya
Yabu Hiroyuki
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