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- W2079334142 abstract "We have developed a potential-energy surface for spin-polarized $mathrm{K}(^{2}S)+{mathrm{K}}_{2}(^{3}ensuremath{Sigma}_{u}^{+})$ collisions and carried out quantum dynamical calculations of vibrational quenching at low and ultralow collision energies for both bosons $^{39}mathrm{K}$ and $^{41}mathrm{K}$ and fermions $^{40}mathrm{K}$. At collision energies above about $0.1phantom{rule{0.3em}{0ex}}mathrm{mK}$ the quenching rates are well described by a classical Langevin model, but at lower energies a fully quantal treatment is essential. We find that for the low initial vibrational state considered here $(v=1)$, the ultracold quenching rates are not substantially suppressed for fermionic atoms. For both bosons and fermions, vibrational quenching is much faster than elastic scattering in the ultralow-temperature regime. This contrasts with the situation found experimentally for molecules formed via Feshbach resonances in very high vibrational states." @default.
- W2079334142 created "2016-06-24" @default.
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- W2079334142 date "2005-03-30" @default.
- W2079334142 modified "2023-10-16" @default.
- W2079334142 title "Ultracold quantum dynamics: Spin-polarized<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>K</mml:mi><mml:mo>+</mml:mo><mml:msub><mml:mi mathvariant=normal>K</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>collisions with three identical bosons or fermions" @default.
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- W2079334142 doi "https://doi.org/10.1103/physreva.71.032722" @default.
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