Physical Review A - Atomic, Molecular, and Optical Physics
We explore the physics of three-dimensional shell-shaped condensates, relevant to cold atoms in "bubble traps." We study the ground state of the condensate wave function, spherically symmetric collective modes, and expansion properties of such a shell using a combination of analytical and numerical techniques. We find two breathing-type modes with frequencies that are distinct from that of the filled spherical condensate. Upon trap release and subsequent expansion, we find that the system displays self-interference fringes. We estimate characteristic time scales, degree of mass accumulation, three-body loss, and kinetic energy release during expansion for a typical system of Rb87.
© 2007 The American Physical Society.
Lannert, Courtney; Wei, T. C.; and Vishveshwara, S., "Dynamics of Condensate Shells: Collective Modes and Expansion" (2007). Physics: Faculty Publications, Smith College, Northampton, MA.