The Journal of Chemical Physics

Reply to ‘‘4He n-mers and Bose–Einstein condensation in He I I ’’

Norman Henry March

Published Jul 1, 1984• 7 citations

Abstract

A reply to the comments of Ghassib and Chester1 on bound and Efimov states of 4He dimers2 and Trimers is presented. It is contended that Bose−Einstein condensation may not be a condition for the appearance of superfluidity in HeII. (AIP).

DOI: 10.1063/1.447351

Related papers

Bound and Efimov states for 4He2 and 4He3 and Bose–Einstein condensation

Norman Henry March

The existence of a Bose–Einstein condensate at absolute zero is disputed. Superfluidity without a condensate is implied. Bound state of helium dimers and trimers are discussed. (AIP)

The Journal of Chemical PhysicsJul 1, 198312 citations

4He n-mers and Bose–Einstein condensation in He I I

H. B. Ghassib, Geoffrey V. Chester

A critique is presented of a recent comment by March in which he argues that the Bose–Einstein condensate may not exist in HeII. It is concluded that such a dramatic statement is not warrranted in the light of current evidence.

The Journal of Chemical PhysicsJul 1, 198416 citations

Bound and Efimov states for /sup 4/He/sub 2/ and /sup 4/He/sub 3/ and Bose--Einstein condensation

Norman Henry March

The existence of a Bose--Einstein condensate at absolute zero is disputed. Superfluidity without a condensate is implied. Bound state of helium dimers and trimers are discussed. (AIP)

Jul 1, 19830 citations

Comment on ‘‘The weakest bond: Experimental observation of helium dimer’’ [J. Chem. Phys. 9 8, 3564 (1993)]

Eric S. Meyer, John C. Mester, Isaac F. Silvera

Recently, Luo et al. reported indirect evidence for the formation of dimers in a supersonic expansion of helium. They interpreted their data as confirmation of the existence of a bound state of 4He–4He with a binding energy of order 1 mK. We show that their data are actually consistent with the formation of helium trimers and not dimers. The two control experiments that they performed do not provide any evidence for discarding this alternative hypothesis.

The Journal of Chemical PhysicsMar 1, 199425 citations

Comment on “Ritz variational treatment of the 4 He trimer” by Geltman S.

Dario Bressanini

In this Comment we show that the recent suggestion that many published calculations of the groundstate energy of the 4He trimer might be wrong is not substantiated.

Europhysics Letters (EPL)Aug 23, 20111 citation

Evidence for a Bose–Einstein condensate in liquid 4He from quantum evaporation

A. F. G. Wyatt

NatureJan 1, 199865 citations