Scattering theory and equation of state of a spherical two-dimensional Bose gas
arXiv:2201.06572 · doi:10.1103/PhysRevA.105.023324
Abstract
We analyze the scattering problem of identical bosonic particles confined on a spherical surface. At low scattering energies and for a radius much larger than the healing length, we express the contact interaction strength in terms of the s-wave scattering length. Adopting this relation, we are then able to regularize the zero-point energy of the spherical Bose gas and to obtain its equation of state, which includes the corrections due to the finite radius of the sphere and coincides with the flat-case result in the infinite-radius limit. We also provide a microscopic derivation of the superfluid density of the system, reproducing a result postulated in a previous work. Our results are relevant for modeling the ongoing microgravity experiments with two-dimensional bubble-trapped Bose-Einstein condensates.
arXiv comment9 pages, 1 figure
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Cited by in corpus (10)
- Low-dimensional quantum gases in curved geometries
- Perspective on Quantum Bubbles in Microgravity
- Shell-shaped atomic gases
- Equatorial Waves in Rotating Bubble-Trapped Superfluids
- Rossby-Haurwitz wave in a rotating bubble-shaped Bose-Einstein condensate
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- Geometric potential for a Bose-Einstein condensate on a curved surface