A bstract We derive new representations of the Einstein-Hilbert action in which graviton
perturbation theory is immensely simplified. To accomplish this, we recast the Einstein …

In this paper, we propose a field redefinition invariant Lagrange multiplier (LM) formalism in
which new ghost-like fields, analogous to Lee–Yang ghosts, are introduced. These ghost …

We discuss the rank-two tensorial Siegel-Zwiebach action from string field theory within a
BRST-invariant functional framework in the bosonic critical dimension. We obtain a new …

By using the Faddeev-Popov quantization procedure, we demonstrate that the radiative
effects computed using the first-order and second-order Einstein-Hilbert action for general …

The first-and second-order forms of gauge theories are classically equivalent; we consider
the consequence of quantizing the first-order form using the Faddeev-Popov approach. Both …

The first order form of the Yang–Mills and Einstein–Hilbert actions are quantized, and it is
shown how Green's functions computed using the first and the second order form of these …

We discuss the divergent graviton propagator massless limit problem in $ D= 26$ and show
how it can be rigorously approached by interconnecting distinct gauge-fixed Siegel …

Quantizing any model in which a Lagrange multiplier (LM) field is used to restrict field
configurations to those that satisfy the classical equations of motion, leads to at most one …

The Dirac constraint formalism is used to analyze the first-order form of the Einstein–Hilbert
action in d> 2 dimensions. Unlike previous treatments, this is done without eliminating fields …

The problem of eliminating divergences arising in quantum gravity is generally addressed
by modifying the classical Einstein-Hilbert action. These modifications might involve the …