Mabuchi spectrum from the minisuperspace

Abstract

It was recently shown that other functionals contribute to the effective action for the Liouville field when considering massive matter coupled to two-dimensional gravity in the conformal gauge. The most important of these new contributions corresponds to the Mabuchi functional. We propose a minisuperspace action that reproduces the main features of the Mabuchi action in order to describe the dynamics of the zero-mode. We show that the associated Hamiltonian coincides with the (quantum mechanical) Liouville Hamiltonian. As a consequence the Liouville theory and our model of the Mabuchi theory both share the same spectrum, eigenfunctions and - in this approximation - correlation functions.

arXiv comment4 pages; v2: change presentation but conclusion unchanged, match published version

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• Minisuperspace computation of the Mabuchi spectrum
• Integrable higher-dimensional cosmology with separable variables in an Einstein-dilaton-antisymmetric field theory
• Gravitational action for a massive Majorana fermion in 2d quantum gravity
• A short note on dynamics and degrees of freedom in $2d$ classical gravity