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

Spin evolution opened a large field in quantum plasma research. The spinwaves in plasmas were considered among new phenomena considered in spin-1/2quantum plasmas. The spin density evolution equation found by means of themany-particle quantum hydrodynamics shows existence of the "thermal" part ofthe spin current, which is an analog of the thermal pressure, or the Fermipressure for degenerate electron gas, existing in the Euler equation. However,this term has been dropped, since there has not been found any equation ofstate for the thermal part of the spin current (TPSC), like we have for thepressure. In this paper we derive the equation of state for the TPSC and applyit for study of spectrum of collective excitations in spin-1/2 quantum plasmas.We focus our research on the spectrum of spin waves, since this spectrum isaffected by the thermal part of the spin current. We consider two kinds ofplasmas: electron-ion plasma with motionless ions and degenerate electrons, anddegenerate electron-positron plasmas. We also present the non-linear Pauliequation with the spinor pressure term containing described effects. Thethermal part of the flux of spin current existing in the spin current evolutionequation is also derived. We also consider the contribution of the TPSC in thegrand generalized vorticity evolution.

On equation of state for the "thermal" part of the spin current: Pauli principle contribution in the spin wave spectrum in cold fermion system