D-branes from N non-BPS D9-branes in Type IIA theory

We construct unstable system D8-brane+D8-antibrane as a kink solution on world-volume of non-BPS D9-brane in Type IIA theory. Further we will make other checks confirming validity of our appro.Comment: 30 pages, corrected some typo

Hamiltonian Formalism of Bimetric Gravity In Vierbein Formulation

This paper is devoted to the Hamiltonian analysis of bimetric gravity in vierbein formulation. We identify all constraints and determine their nature. We also show an existence of additional constraint so that the scalar mode can be eliminated.Comment: 26 pages,v2:references added, v3:completely rewritten paper when the crucial error in the first version was identified so that opposite conclusion was reache

Note About Canonical Formalism for Normalized Gravity And Vacuum Energy Sequestering Model

This short note is devoted to the Hamiltonian analysis of the normalized general relativity and recently proposed model of vacuum energy sequestering. The common property of these models is the presence of the global variables. We discuss the meaning of these global variables in the context of the canonical formalism and argue that their presence lead to the non-local form of the Hamiltonian constraint.Comment: 12 page

(m,n)-String and D1-Brane in Stringy Newton-Cartan Background

This paper is devoted to the analysis of (m,n)-string in stringy Newton-Cartan background. We start with the Hamiltonian constraint for (m,n)-string in general background and perform limiting procedure on metric and NSNS and Ramond-Ramond two form background that leads to stringy Newton-Cartan gravity. We also analyze conditions that these background fields have to obey in order to define consistent world-sheet (m,n)-theory. We also discuss D1-brane with dynamical electric field in stringy Newton-Cartan gravity.Comment: 19 page