Portal de Periódicos da CAPES

Feynman - graph calculation of the (0, l ) critical exponents to order ε 2

1974; American Institute of Physics; Volume: 10; Issue: 1 Linguagem: Inglês

10.1103/physreva.10.435

0556-2791

A. Houghton, Franz Wegner,

Quantum, superfluid, helium dynamics

It is shown that the critical indices corresponding to (0, $l$ perturbations can be calculated by a Feynman-diagram method. At order ${\ensuremath{\epsilon}}^{2}$, the results are consistent with the special cases $l=1,2, \mathrm{and} 4$ obtained previously. There is also general agreement to order $\ensuremath{\epsilon}$ with the exponents calculated from Wilson's recurrence relation.