Controlled Description Of Non-Fermi Liquids Using Field-Theoretic Methods

This book offers a concise introduction to non-Fermi liquid (NFL) states—metallic systems that lie beyond the scope of Landau Fermi liquid theory. NFLs emerge in strongly interacting quantum many-body systems, where conventional quasiparticle descriptions fail due to coupling between soft Fermi surface fluctuations and gapless bosonic modes. These systems are governed by strongly coupled quantum f...