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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We compute the phase diagram of a one-dimensional model of spinless fermionswith pair-hopping and nearest-neighbor interaction, first introduced by Ruhmanand Altman, using the density-matrix renormalization group combined withvarious analytical approaches. Although the main phases are a Luttinger liquidof fermions and a Luttinger liquid of pairs, we also find remarkable phases inwhich only a fraction of the fermions are paired. In such case, two situationsarise: either fermions and pairs coexist spatially in a two-fluid mixture, orthey are spatially segregated leading to phase separation. These results aresupported by several analytical models that describe in an accurate way variousrelevant cuts of the phase diagram. Last, we identify relevant microscopicobservables that capture the presence of these two fluids: while originallyintroduced in a phenomenological way, they support a wider application oftwo-fluid models for describing pairing phenomena.

Two-fluid coexistence and phase separation in a one dimensional model with pair hopping and density interactions