Quantum gravity and scalar fields
نویسندگان
چکیده
منابع مشابه
Quantum complex scalar fields and noncommutativity
In this work we analyze complex scalar fields using a new framework where the object of noncommutativity θ represents independent degrees of freedom. In a first quantized formalism, θ and its canonical momentum πμν are seen as operators living in some Hilbert space. This structure is compatible with the minimal canonical extension of the Doplicher-Fredenhagen-Roberts (DFR) algebra and is invari...
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We elaborate further the functional Schrödinger-picture approach to the quantum field in curved spacetimes using the generalized invariant method and construct explicitly the Fock space, which we relate with the thermal field theory. We apply the method to a free massive scalar field in the de Sitter spacetime, and find the exact quantum states, construct the Fock space, and evaluate the two-po...
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We take the first nontrivial coefficient of the Schwinger-DeWitt expansion as a leading correction to the action of the second-derivative metric-dilaton gravity. To fix the ambiguities related with an arbitrary choice of the gauge fixing condition and the parametrization for the quantum field, one has to use the classical equations of motion. As a result, the only corrections are the ones to th...
متن کاملThree Dimensional Gravity in the Presence of Scalar Fields
We study a scalar field in curved space in three dimensions. We compare the results obtained by using perturbation theory and numerical solutions, especially regarding to singularity behaviour at infinity. We find that both methods point to the necessity of excising the space-time around the origin. key words: black holes, Choptuik formation, + [email protected] * [email protected]
متن کاملStationary Points of Scalar Fields Coupled to Gravity
H. Kröger, G. Melkonyan, F. Paradis, S.G. Rubin a Département de Physique, Université Laval, Québec, Québec G1K 7P4, Canada b Moscow State Engineering Physics Institute, Kashirskoe sh., 31, Moscow 115409, Russia c Center for Cosmoparticle Physics ”Cosmion”, Moscow, 125147, Russia Abstract We investigate the dynamics of gravity coupled to a scalar field using a non-canonical form of the kinetic ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2010
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2009.12.032