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

It is known that purely repulsive self-propelled colloids can undergo bulkliquid-vapor phase separation. In experiments and large scale simulations,however, more complex steady states are also seen, comprising a dynamicpopulation of dense clusters in a sea of vapor, or dilute bubbles in a liquid.Here we show that these microphase-separated states should emerge genericallyin active matter, without any need to invoke system-specific details. We give acoarse-grained description of them, and predict transitions between regimes ofbulk phase separation and microphase separation. We achieve these results byextending the $\phi^4$ field theory of passive phase separation to allow forall local currents that break detailed balance at leading order in the gradientexpansion. These local active currents, whose form we show to emerge fromcoarse-graining of microscopic models, include a mixture of irrotational androtational contributions, and can be viewed as arising from an effectivenonlocal chemical potential. Such contributions influence, and in someparameter ranges reverse, the classical Ostwald process that would normallydrive bulk phase separation to completion.

Cluster phases and bubbly phase separation in active fluids: Reversal of the Ostwald process