272 citations · 933 across the 31 of their papers we have counts for
21 papers · 1 filter
On Time-Evolution in Quantum Gravity
Lasha Berezhiani, Gia Dvali, Otari Sakhelashvili
We derive an explicit BRST-exact operator identity for the bulk Hamiltonian in quantum gravity, working within a BRST-invariant quantization of General Relativity, treated as a low…
Coherence and Quantum Stability of Relativistic Superfluid States
Lasha Berezhiani, Giordano Cintia, Giacomo Contri
We analyze the quantum dynamics of a relativistic homogeneous superfluid in a complex scalar field theory. Unlike zero-charge condensates, which undergo quantum evaporation due to…
Coherent States in Gauge Theories: Topological Defects and Other Classical Configurations
Lasha Berezhiani, Gia Dvali, Otari Sakhelashvili
We present a formulation of coherent states as of consistent quantum description of classical configurations in the BRST-invariant quantization of electrodynamics. The quantization…
Consistent Canonical Quantization of Gravity: Recovery of Classical GR from BRST-invariant Coherent States
Lasha Berezhiani, Gia Dvali, Otari Sakhelashvili
We perform canonical quantization of General Relativity, as an effective quantum field theory below the Planck scale, within the BRST-invariant framework. We show that the promotio…
Perturbative Construction of Coherent States
Lasha Berezhiani, Giordano Cintia, Michael Zantedeschi
The perturbative consistency of coherent states within interacting quantum field theory requires them to be altered beyond the simple non-squeezed form. Building on this point, we…
A Relativistic Gas of Inflatons as an Initial State for Inflation
Lasha Berezhiani, Mark Trodden
The possibility of the resilience of the beginning of inflation under unfavorable conditions is examined by considering the initial state of the inflaton field to be in the form of…