1999/10/31 by C. Callegari, Carlo Callegari, A. Conjusteau +6 · 124 citations
Physics and Astronomy · #Adiabatic process #Atomic and Subatomic Physics Research #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Compressibility #Conservative vector field #Molecule #Moment (physics) #Moment of inertia #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Superfluidity #Thermodynamics #cond-mat #physics.chem-ph
paper · pdf · doi:10.1103/physrevlett.83.5058
published in Physical Review Letters 83(24), 5058-5061 (American Physical Society) · 4 pages, 1 eps figure, corrected version of published paper. Erratum has been submitted for changes
openalex publication_date 1999/12/13 · arxiv created 1999/12/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a superfluid hydrodynamic model for the increase in moment of inertia, \ensuremathΔI, of molecules rotating in liquid 4He. The static inhomogeneous He density around each molecule (calculated using the Orsay-Paris liquid 4He density functional) is assumed to adiabatically follow the rotation of the molecule. We find that the \ensuremathΔI values created by the viscousless and irrotational flow are in good agreement with the observed increases for several molecules [OCS, (HCN)2, HCCCN, and HCCCH3]. For HCN and HCCH, our model substantially overestimates \ensuremathΔI. This is likely to result from a (partial) breakdown of the adiabatic following approximation.