6 papers
Coherent states versus Glauber-Sudarshan States: Bootstrapping, Schwinger-Keldysh Contours and Lefschetz Thimbles
Heliudson Bernardo, Tatsuya Daniel, Keshav Dasgupta +3
We investigate how, in a highly constrained system such as a four-dimensional diffeomorphism-invariant theory with vanishing bulk Hamiltonian and non-trivial interactions between t…
Towards Wedge Construction of Four-Dimensional Non-Supersymmetric Theories and Torsion Classes
Keshav Dasgupta, Radu Tatar
Motivated by recent proposals relating non-supersymmetric Type 0A theory to M-theory compactified on a singular wedge geometry, we study an M-theory compactification on a seven-man…
Collective field theory of gauged multi-matrix models: Integrating out off-diagonal strings
Suddhasattwa Brahma, Robert Brandenberger, Keshav Dasgupta +2
We study a two-matrix toy model with a BFSS-like interaction term using the collective field formalism. The main technical simplification is obtained by gauge-fixing first, and int…
Transient de Sitter and Quasi de Sitter States in SO(32) and E_8 x E_8 Heterotic String Theories
Keshav Dasgupta, Suddhasattwa Brahma, Bohdan Kulinich +3
One of the long-standing puzzles in string theory has been on the existence of a four-dimensional de Sitter and quasi de Sitter configurations, the latter being defined with a temp…
de Sitter Excited State in Heterotic E_8 x E_8 Theory
Suddhasattwa Brahma, Keshav Dasgupta, Bohdan Kulinich +3
We devise a novel duality sequence to study late-time cosmology in the heterotic E_8 x E_8 setup of Horava and Witten with dynamical walls that are moving towards each other. Surpr…
Wheeler-De Witt equation and the Canonical Construction of the Glauber-Sudarshan States in Quantum Gravity
Keshav Dasgupta, Fang-Yi Guo, Bohdan Kulinich
Quantum gravity is fundamentally different from the non-gravitational quantum field theories in the sense that most of the techniques derived for the latter cannot be easily extend…