Special Issue "Higher Spin Gauge Theories"
A special issue of Universe (ISSN 2218-1997).
Deadline for manuscript submissions: closed (31 October 2017).
A printed edition of this Special Issue is available here.
Interests: higher spin gauge theories; supergravity and duality; fractional spin fields and anyons; BRST-BV formalism; Weyl invariance in gravity; Poisson Sigma Models; AKSZ quantization; AdS/CFT
Special Issues and Collections in MDPI journals
Interests: Higher spin gauge theories; gravitational theories in three space-time dimensions; AdS/CFT
Vasiliev's equations are, to this day, the only known set of consistent and non-linear equations that describe, after linearisation around four dimensional (anti-)de Sitter spacetime, the free propagation of an infinite set of higher-spin gauge fields featuring the graviton. These last two years, new results have been derived in Higher Spin (HS) theory. They partly confirmed some expectations on the subject and they also showed that more work is required for a better understanding of the weak-field expansion of Vasiliev's equations around (A)dS4. On the one hand, the holographic reconstruction of a theory from the free O(N) model in three dimensions seems to reproduce, as expected from the HS/CFT conjecture, a non-abelian gauge theory of higher spin fields in (A)dS4. On the other hand, the Vasiliev equations display some seemingly unavoidable non-localities in their perturbative regime around (A)dS4. These last results raise some questions regarding the status of the HS4/CFT3 duality. In parallel, recent works performed in the light-cone gauge bring back to the scene some results obtained by Metsaev in the early nineties, pointing to the existence of a consistent and interacting HS theory in flat background. This special issue is intended to gather together contributions analyzing these and similar exciting and timely questions on Higher Spin Gauge Theories.
Prof. Dr. Nicolas Boulanger
Dr. Andrea Campoleoni
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