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Positronium-positronium scattering using the stochastic variational method

Mitroy, Jim, Ivanov, Igor A. and Varga, Kalman (2002). Positronium-positronium scattering using the stochastic variational method. Physical Review A (Atomic, Molecular and Optical Physics),65(2):022704-1-022704-9.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 28 times in Scopus Article | Citations

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Title Positronium-positronium scattering using the stochastic variational method
Author Mitroy, Jim
Ivanov, Igor A.
Varga, Kalman
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Publication Date 2002
Volume Number 65
Issue Number 2
ISSN 1094-1622   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-4243468967
Start Page 022704-1
End Page 022704-9
Total Pages 9
Place of Publication College Park, United States
Publisher The American Physical Society
Field of Research 0202 - Atomic, Molecular, Nuclear, Particle and Plasma Physics
0204 - Condensed Matter Physics
0205 - Optical Physics
HERDC Category C1 - Journal Article (DEST)
Abstract The stochastic variational method is used in conjunction with stabilization ideas to compute the low-energy s-wave phase shifts and scattering lengths for Ps-Ps scattering. The scattering lengths obtained were 8.44a0 for the singlet-singlet and 3.00a0 for the triplet-triplet states (the spin state refers to the coupling of the two electrons and the coupling of the two positrons in the system). The positive scattering length in the triplet-triplet channel means a stable Bose-Einstein condensate of triplet Ps atoms is physically possible. The large value of the 3Ps3Ps→1Ps1Ps cross section, 7.41πa02 suggests the use of spin-polarized positrons as advanced by Platzmann and Mills [Phys. Rev. B 49 454 (1994)].
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Additional Notes Copyright by the The American Physical Society

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