Phase Diagram Of 1+1D Abelian-Higgs Model And Its Critical Point

Phase Diagram of 1+1D Abelian-Higgs Model and Its Critical Point

Authors: Chanda, Titas; Lewenstein, Maciej; Zakrzewski, Jakub; Tagliacozzo, Luca

Journal: PHYSICAL REVIEW LETTERS

Publication date: 2022/02/28

Abstract: We determine the phase diagram of the Abelian-Higgs model in one spatial dimension and time (1 + 1D) on a lattice. We identify a line of first order phase transitions separating the Higgs region from the confined one. This line terminates in a quantum critical point above which the two regions are connected by a smooth crossover. We analyze the critical point and find compelling evidence for its description as the product of two noninteracting systems: a massless free fermion and a massless free boson. However, we find also some surprising results that cannot be explained by our simple picture, suggesting this newly discovered critical point is an unusual one.

About the Author: Marcelo Castellanos

Marcelo Castellanos desempeña su actividad en la Unidad de Gerencia del Instituto de Física Fundamental del CSIC. Ha sido profesor ayudante en la Universidad Autónoma de Madrid y defendió su tesis doctoral en la UAM en el campo de la Astrofísica Extragaláctica. En el mismo campo, ha realizado investigación postdoctoral en el CNRS. Tiene experiencia en el sector privado y desde 2006 ha sido facilitador/”doer”/burócrata/gestor en 3 grandes proyectos de investigación en Astrofísica Molecular, Física Química y Nanociencia (ASTROCAM - Ref.: S-.0505/ESP/000237 entre 2006 y 2009; Consolider-Ingenio ASTROMOL - Ref.: CSD2009-00038 entre 2009 y 2016 y ERC Synergy Grant NANOCOSMOS - Ref.: GA 610256 entre 2014 y 2021)

Phase Diagram of 1+1D Abelian-Higgs Model and Its Critical Point

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About the Author: Marcelo Castellanos