A discussion of the number of degrees of freedom, and their dynamical properties, in higher derivative gravitational theories is presented. The complete non-linear sigma model for these degrees of freedom is exhibited using the method of auxiliary fields. As a by-product we present a consistent non-linear coupling of a spin-2 tensor to gravitation. It is shown that non-vanishing (Cμναβ) 2 terms...

We employ Wilson's renormalization group procedure in an attempt to classify and understand the physics of the continuum limits of scalar field theories. Analysis of the flows near the Gaussian fixed point reveals the existence of an infinite set of asymptotically free continuum limits. We study the associated physics by calculating scattering cross sections and the i-loop effective potential. ...

⋆ Permanent address: Universität Bonn, Physikalisches Institut, Nussallee 12, W-5300 Bonn 1, Germany. We obtain the double scaling limit of a set of superloop equations recently proposed to describe the coupling of two-dimensional supergravity to minimal superconformal matter of type (2, 4m). The continuum loop equations are described in terms of a ĉ = 1 theory with a Z2-twisted scalar field an...

Multidimensional cosmological model describing the evolution of (n + 1) Einstein spaces in the theory with several scalar fields and forms is considered. When a (electro-magnetic composite) p-brane Ansatz is adopted the field equations are reduced to the equations for Toda-like system. The Wheeler–De Witt equation is obtained. In the case when n ”internal” spaces are Ricci-flat, one space M0 ha...

In effective field theory, the positivity bounds of higher derivative operators are derived from analyticity, causality, and unitarity. We show that on some e.g., dimension-eight term a single massless scalar field, Standard Model Effective Field Theory $SU(N)$ gauge bosonic operators, higher-derivative in Einstein-Maxwell generated by interactions between heavy light degrees freedom can be non...

We introduce a numerical method and python package, chimes, that simulates quantum systems initially well approximated by mean field theory using second order extension of the classical approach. call this moment expansion method. In way, we can accurately approximate evolution first moments beyond where breaks down. This allows us to estimate break time approximation without any calculations e...

In this paper we continue our study of the exact solution in open bosonic string field theory. We present solution in the string field theory defined on the background corresponding to the boundary conformal field theory (BCFT ) describing D25-brane. We then show that the string field theory that arises from the original one by an expansion about this classical solution can be interpreted as th...