2002/09/13 by X. S. Chen, X.S. Chen, V. Dohm
Engineering · Physics and Astronomy · #Casimir effect #Casimir pressure #Phase Equilibria and Thermodynamics #Quantum Electrodynamics and Casimir Effect #Quantum, superfluid, helium dynamics #Scaling #Scaling law #Superfluidity #Theorem of corresponding states #Van der Waals surface #cond-mat.stat-mech #van der Waals force
paper · pdf · doi:10.1016/s0921-4526(02)01957-9
2 pages, submitted to LT23 Proceedings on June 14, 2002, accepted for publication in Physica B on September 12, 2002
arxiv created 2002/09/13 · openalex publication_date 2003/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the results of a one-loop calculation of the effect of a van der Waals type interaction potential ∼ | \bf x |-d-σ on the critical Casimir force and specific heat of confined 4He near the superfluid transition. We consider a 4He film of thickness L. In the region L \gtrsim ξ (correlation length) we find that the van der Waals interaction causes a leading non-universal non-scaling contribution of O (ξ2 L-d-σ) to the critical temperature dependence of the Casimir force above Tλ that dominates the universal scaling contribution ∼ e- L/ξ predicted by earlier theories. For the specific heat we find subleading non-scaling contributions of O(L-1) and O(L-d-σ).