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29 papers · 1 filter
New Action Principle for General Relativity
Kirill Krasnov
General Relativity can be reformulated as a diffeomorphism invariant SU(2) gauge theory. A new action principle for this "pure connection" formulation of GR is described.
A Unified Theory of Non-Linear Electrodynamics and Gravity
Alexander Torres-Gomez, Kirill Krasnov, Carlos Scarinci
We describe a class of unified theories of electromagnetism and gravity. The Lagrangian is of the BF type, with a potential for the B-field, the gauge group is U(2) (complexified).…
Quantum dynamics of the Einstein-Rosen wormhole throat
Gabor Kunstatter, Jorma Louko, Ari Peltola
We consider the polymer quantization of the Einstein wormhole throat theory for an eternal Schwarzschild black hole. We numerically solve the difference equation describing the qua…
Analogue Cosmological Particle Creation: Quantum Correlations in Expanding Bose Einstein Condensates
Angus Prain, Serena Fagnocchi, Stefano Liberati
We investigate the structure of quantum correlations in an expanding Bose Einstein Condensate (BEC) through the analogue gravity framework. We consider both a 3+1 isotropically exp…
Semiclassical Gravity in the Far Field Limit of Stars, Black Holes, and Wormholes
Eric D. Carlson, Paul R. Anderson, Alessandro Fabbri +3
Semiclassical gravity is investigated in a large class of asymptotically flat, static, spherically symmetric spacetimes including those containing static stars, black holes, and wo…
Motion of a "small body" in non-metric gravity
Kirill Krasnov
We describe "small bodies" in a non-metric gravity theory previously studied by this author. The main dynamical field of the theory is a certain triple of two-forms rather than the…