Supertraces on the Algebras of Observables of the Rational Calogero Model with Harmonic Potential

Abstract

We define a complete set of supertraces on the algebra $SH_N(ν)$, the algebra of observables of the $N$-body rational Calogero model with harmonic interaction. This result extends the previously known results for the simplest cases of $N=1$ and $N=2$ to arbitrary $N$. It is shown that $SH_N(ν)$ admits $q(N)$ independent supertraces where $q(N)$ is a number of partitions of $N$ into a sum of odd positive integers, so that $q(N)>1$ for $N\ge 3$. Some consequences of the existence of several independent supertraces of $SH_N (ν)$ are discussed such as the existence of ideals in associated $W_{\infty}$ - type Lie superalgebras.