37 citations · 222 across the 16 of their papers we have counts for
10 papers · 1 filter
Coherent States Expectation Values as Semiclassical Trajectories
N. C. Dias, A. Mikovic, J. N. Prata
We study the time evolution of the expectation value of the anharmonic oscillator coordinate in a coherent state as a toy model for understanding the semiclassical solutions in qua…
Spin Foam Models of Matter Coupled to Gravity
A. Mikovic
We construct a class of spin foam models describing matter coupled to gravity, such that the gravitational sector is described by the unitary irreducible representations of the app…
Two-loop Back-reaction in 2D Dilaton Gravity
A. Mikovic, V. Radovanovic
We calculate the two-loop quantum corrections, including the back-reaction of the Hawking radiation, to the one-loop effective metric in a unitary gauge quantization of the CGHS mo…
W-Strings on Curved Backgrounds
A. Mikovic, B. Sazdovic
We discuss a canonical formalism method for constructing actions describing propagation of W-strings on curved backgrounds. The method is based on the construction of a representat…
W-Strings on Group Manifolds
A. Mikovicć, B. Sazdović
We present a procedure for constructing actions describing propagation of W-strings on group manifolds by using the Hamiltonian canonical formalism and representations of W-algebra…
Hawking Radiation and Back-Reaction in a Unitary Theory of 2D Quantum Gravity
A. Mikovic
We investigate the semiclassical limit and quantum corrections to the metric in a unitary quantum gravity formulation of the CGHS 2d dilaton gravity model. A new method for calcula…
Symplectic Structure of 2D Dilaton Gravity
A. Mikovic, M. Navarro
We analyze the symplectic structure of two-dimensional dilaton gravity by evaluating the symplectic form on the space of classical solutions. The case when the spatial manifold is…
Two-dimensional dilaton gravity in a unitary gauge
A. Mikovic
Reduced phase space formulation of CGHS model of 2d dilaton gravity is studied in en extrinsic time gauge. The corresponding Hamiltonian can be promoted into a Hermitian operator a…
Exactly Solvable Models of 2d Dilaton Quantum Gravity
A. Mikovic
We study canonical quantization of a class of 2d dilaton gravity models, which contains the model proposed by Callan, Giddings, Harvey and Strominger. A set of non-canonical phase…
Ashtekar Formulation of 2+1 Gravity on a Torus
N. Manojlovic, A. Mikovic
Pure (2+1)-dimensional Einstein gravity is analysed in the Ashtekar formulation, when the spatial manifold is a torus. We have found a set of globally defined observables, forming…