Dark Energy and the Spinning Particle

par Ivo Sachs (Ludwig-Maximilians-Universität München)

jeudi 9 nov. 2023, 11:00 → 12:00 Europe/Paris

Auditorium Vivargent (LAPTh)

I will give a lightening review of the theory of  classical  background fields induced by the Becchi-Rouet-Stora-Tyutin algebra of a spinning particle, such as the graviton. On a generic background, the closure of the algebra implies Einstein’s equations with a cosmological constant that is undetermined. In the "vacuum" background without any metric, elementary excitations consist of a bunch of non-dynamical scalar- and vector fields. However,  only certain combinations of these, survive beyond the linear level with the vector field inducing an Einstein metric.