Spectral Action in Noncommutative Geometry

Description

What is spectral action, how to compute it and what are the known examples? This book offers a guided tour through the mathematical habitat of noncommutative geometry à la Connes, deliberately unveiling the answers to these questions. After a brief preface flashing the panorama of the spectral approach, a concise primer on spectral triples is given. Chapter 2 is designed to serve as a toolkit for computations. The third chapter offers an in-depth view into the subtle links between the asymptotic expansions of traces of heat operators and meromorphic extensions of the associated spectral zeta functions. Chapter 4 studies the behaviour of the spectral action under fluctuations by gauge potentials. A subjective list of open problems in the field is spelled out in the fifth Chapter. The book concludes with an appendix including some auxiliary tools from geometry and analysis, along with examples of spectral geometries. The book serves both as a compendium for researchers in the domain of noncommutative geometry and an invitation to mathematical physicists looking for new concepts. Front Matter ....Pages i-xiv The Dwelling of the Spectral Action (Michał Eckstein, Bruno Iochum)....Pages 1-36 The Toolkit for Computations (Michał Eckstein, Bruno Iochum)....Pages 37-62 Analytic Properties of Spectral Functions (Michał Eckstein, Bruno Iochum)....Pages 63-94 Fluctuations of the Spectral Action (Michał Eckstein, Bruno Iochum)....Pages 95-112 Open Problems (Michał Eckstein, Bruno Iochum)....Pages 113-119 Back Matter ....Pages 121-155