A superfluid hydrodynamic model for the enhanced moments of inertia of molecules in liquid 4He

Abstract

We present a superfluid hydrodynamic model for the increase in moment of inertia, $\Delta I$, of molecules rotating in liquid ${}^4$He. The static inhomogeneous He density around each molecule (calculated using the Orsay-Paris liquid ${}^4$He density functional) is assumed to adiabatically follow the rotation of the molecule. We find that the $\Delta I$ values created by the viscousless and irrotational flow are in good agreement with the observed increases for several molecules [ OCS, (HCN)${}_2$, HCCCN, and HCCCH${}_3$ ]. For HCN and HCCH, our model substantially overestimates $\Delta I$. This is likely to result from a (partial) breakdown of the adiabatic following approximation.

4 pages, 1 eps figure, corrected version of published paper. Erratum has been submitted for changes

References in corpus (2)

• Potential of a neutral impurity in a large ${}^4$He clusters
• The Rotational Structure of Molecules In the Quantum He4 and He3 Liquids

Cited by in corpus (23)

• Spectroscopy and dynamics in helium nanodroplets
• Helium nanodroplet isolation ro-vibrational spectroscopy: methods and recent results
• Quantum control of molecular rotation
• Superfluidity in a Doped Helium Droplet
• Quasiparticle approach to molecules interacting with quantum solvents
• Microscopic molecular superfluid response: theory and simulations
• Helium nanodroplets and trapped Bose-Einstein condensates as prototypes of finite quantum fluids
• Pinning of quantized vortices in helium drop by dopant atoms and molecules
• Quantum Rotation of HCN and DCN in Helium-4
• Rotation in liquid ${}^4$He: Lessons from a toy model
• Surface location of sodium atoms attached to He-3 nanodroplets
• Probing vortices in 4He nanodroplets
• Quantum Hydrodynamic Model for the enhanced moments of Inertia of molecules in Helium Nanodroplets: Application to SF${}_6$
• Excited rotational states of molecules in a superfluid
• Calculation of hydrodynamic mass for atomic impurities in helium
• Detailed study of dissipative quantum dynamics of K-2 attached to helium nanodroplets
• Dynamics of immersed molecules in superfluids
• A simple model for high rotational excitations of molecules in a superfluid
• Multipole response of doped ${}^3$He drops
• Quantum dynamics of molecules in 4He nano-droplets: Microscopic Superfluidity
• Structure and spectroscopy of doped helium clusters using quantum Monte Carlo techniques
• Quantum rotor in a two-dimensional mesoscopic Bose gas
• Environment-limited transfer of angular momentum in Bose liquids