Theoretical analysis of an experiment to measure the condensate fraction in superfluid helium four

Charles E Campbell, J W Halley

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We examine the theoretical analysis of an experiment proposed by one of us to observe the condensate fraction of helium four by firing low energy pulses of helium atoms at suspended droplets of the superfluid and observing the resulting emission of helium atoms from the fluid. The basic approach to such an analysis is to find the many body ground state wave functions of liquid helium with N+1 particles and the appropriate boundary conditions for one particle, infinitely far away from the surfaces on the right and left sides of the fluid sample. We characterize the observed rate in terms of the transmission coefficient for the process by which a helium atom appears on the right as a consequence of an incident particle impinging on the fluid from the left with momentum h{stroke}k.

Original languageEnglish (US)
Pages (from-to)533-534
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Volume194-196
Issue numberPART 1
DOIs
StatePublished - Feb 2 1994

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