Kinklike structures in scalar field theories: From one-field to two-field models

Nonextensive scalar field theories and dark energy models

Current astronomical measurements indicate that approximately 73% of the universe is made up of dark energy. Stochastically quantized self-interacting scalar fields can serve as suitable models to generate dark energy. We study a particular model where the scalar field theory underlying dark energy exhibits strongest possible chaotic behaviour. It is shown that the fluctuating chaotic field mom...

Tricritical behavior of two-dimensional scalar field theories.

We compute by Monte Carlo numerical simulations the critical exponents of two-dimensional scalar eld theories at the 6 tricritical point. The results are in agreement with the Zamolodchikov conjecture based on conformal invariance. 1 In the last decade there has been a considerable progress in the classiication of uni-versality classes of two-dimensional (2D) critical phenomena in terms of conf...

scalar-tensor theories for traceless matter field

ω(φ) → ∞ limit of scalar tensor theories are studied for traceless matter source. It is shown that the limit ω(φ) → ∞ does not reduce a scalar tensor theory to GR. An exact radiation solution of scalar tensor cosmology under modified Nordtvedt conditions is obtained for flat Friedmann universe. PACS numbers: 04.50. +h

Infrared Properties of Scalar Field Theories

Quantum Solution to Scalar Field Theory Models

Amplitudes A n in d-dimensional scalar field theory are generated, to all orders in the coupling constant and at n-point. The amplitudes are expressed as a series in the mass m and coupling λ. The inputs are the classical scattering, and these generate, after the integrals are performed, the series expansion in the couplings λ i. The group theory of the scalar field theory leads to an additiona...