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

An effective low energy field theory is developed for a system of two chains.The main novelty of the approach is that it allows to treat generic intrachainrepulsive interactions of arbitrary strength. The chains are coupled by adirect tunneling and four-fermion interactions. At low energies the individualchains are described as Luttinger liquids with an arbitrary ratio of spin $v_s$and charge $v_c$ velocities. A judicious choice of the basis for the decoupledchains greatly simplifies the description and allows one to separate high andlow energy degrees of freedom. In a direct analogy to the bulk cuprates theresulting effective field theory distinguishes between three qualitativelydifferent regimes: (i) small doping ($v_c << v_s$), (ii) optimal doping ($v_s\approx v_c$) and (iii) large doping ($v_s << v_c$). I discuss the excitationspectrum and derive expressions for the electron spectral function which turnsout to be highly incoherent. The degree of incoherence increases when oneconsiders an array of ladders (stripe phase).

A Field Theory for Fermionic Ladder with Generic Intrachain Interactions