Fluctuation-induced forces in periodic slabs: Breakdown of epsilon expansion at the bulk critical point and revised field theory

H. W. Diehl, Daniel Grüneberg, M. A. Shpot

Systems described by $n$-component ${\varphi }^4$ models in a ${\infty }^{d-1}\times L$ slab geometry of finite thickness $L$ are considered at and above their bulk critical temperature $T_{c,…