English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The bulk viscosity of two-component fermions with a zero-range interaction isrevisited both in two and three dimensions. We first point out that the"standard" Kubo formula employed in recent studies has flaws to give rise to anunphysical divergent bulk viscosity even in a limit where it is supposed tovanish. The corrected Kubo formula as well as the sum rule is then carefullyrederived so as to confirm that the bulk viscosity indeed vanishes in the free,unitarity, and dimer limits. We also discuss that the recently founddiscrepancy between the Kubo formalism and the kinetic theory for the bulkviscosity is attributed to the fact that the quasiparticle approximationassumed by the latter breaks down even in the high-temperature limit.

Bulk viscosity of resonating fermions revisited: Kubo formula, sum rule, and the dimer and high-temperature limits