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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Coupling strength effect on the quark matter with finite isospin chemicalpotential is studied in a Pauli-Villars regularized NJL model. A BCS-BECcrossover occurs along the phase boundary of pion superfluid phase transition,as increasing coupling strength $G$. For strong coupling cases, the criticalisospin chemical potential for pion superfluid phase transition $\mu_I^c$ isexactly the same as pion mass in vacuum $M_\pi$. Around the critical point$\mu_I^c$, the pion superfluid quark matter is in BEC state, associated with afast increase of pion condensate. For weak coupling cases, we obtain$\mu_I^c<M_\pi$, and a mass jump of the Goldstone boson at the critical point$\mu_I^c$. The pion superfluid quark matter is in BCS state even around$\mu_I^c$, accompanied by a slow increase of pion condensate. Note that$\mu_I^c$ is a non-monotonic function of coupling strength $G$. On the otherhand, coupling strength effect changes the bulk properties of quark matter. Instrong (weak) coupling cases, the EoS of quark matter at finite isospinchemical potential is stiff (soft). Therefore, the compact stars composed ofstrong (weak) coupling pion superfluid quark matter has a heavier (lighter)mass and larger (smaller) radius.

Coupling strength induced BCS-BEC crossover on phase boundary of pion superfluid