What is recorded here?
Pereira Dos Santos and colleagues observed a condensate of metastable helium-4 atoms in a magnetic trap using absorption imaging after release. Its bimodal distribution and changing expansion anisotropy supported condensation. They estimated the scattering length and reported roughly two-second condensate decay.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
This was a dilute excited-state gas, distinct from liquid superfluid helium and earlier alkali and hydrogen gas condensates. Atom-number calibration and inferred scattering length have large uncertainties; the authors could not distinguish two-body from three-body losses and gave upper bounds under separate assumptions. The manuscript credits an independent Orsay observation made with a different detection method. The arXiv v1 quoted collision rate differs from the later journal abstract; no version equivalence is assumed.
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People and systems
F. Pereira Dos Santos; J. Léonard; Junmin Wang; C. J. Barrelet; F. Perales; E. Rasel; C. S. Unnikrishnan; M. Leduc; C. Cohen-Tannoudji
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
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English catalogue narrative
A metastable-helium gas forms a Bose-Einstein condensate
Pereira Dos Santos and colleagues observed a condensate of metastable helium-4 atoms in a magnetic trap using absorption imaging after release. Its bimodal distribution and changing expansion anisotropy supported condensation. They estimated the scattering length and reported roughly two-second condensate decay.
Scientific scope
This was a dilute excited-state gas, distinct from liquid superfluid helium and earlier alkali and hydrogen gas condensates. Atom-number calibration and inferred scattering length have large uncertainties; the authors could not distinguish two-body from three-body losses and gave upper bounds under separate assumptions. The manuscript credits an independent Orsay observation made with a different detection method. The arXiv v1 quoted collision rate differs from the later journal abstract; no version equivalence is assumed.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
F. Pereira Dos Santos; J. Léonard; Junmin Wang; C. J. Barrelet; F. Perales; E. Rasel; C. S. Unnikrishnan; M. Leduc; C. Cohen-Tannoudji
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.