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Positronium-positronium interaction: Resonance, scattering length, and Bose-Einstein condensation | | Sadhan K. Adhikari
; | | Date: |
15 Aug 2001 | | Journal: | Phys. Lett. A 294 (2002) 308-313 | | Subject: | Soft Condensed Matter; Atomic Physics; Chemical Physics | cond-mat.soft physics.atom-ph physics.chem-ph | | Abstract: | The low-energy scattering of ortho positronium (Ps) by ortho Ps has been studied in a full quantum mechanical coupled-channel approach. In the singlet channel (total spin $s_T=0$) we find S- and P-wave resonances at 3.35 eV (width 0.02 eV) and 5.05 eV (width 0.04 eV), respectively and a binding of 0.44 eV of Ps$_2$. The scattering length for $s_T=0$ is 3.95 AA and for $s_T=2$ is 0.83 AA . The small $s_T=2$ scattering length makes the spin-polarized ortho Ps atoms an almost noninteracting ideal gas which may undergo Bose-Einstein condensation. | | Source: | arXiv, cond-mat/0108250 | | Services: | Forum | Review | PDF | Favorites | |
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