Towards brane-antibrane inflation in type IIA: the holographic MQCD mode

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A simple model for quintessential inflation

We propose a simple toy model for quintessential inflation where a complex scalar field described by a Lagrangian with a U(1)(PQ) symmetry spontaneously broken at a high energy scale and explicitly broken by instanton effects at a much lower energy can account for both the early inflationary phase and the recent accelerated expansion of the Universe. The real part of the complex field plays the role of the in flaton whereas the imaginary part, the 'axion', is the quintessence field.

Inflation and relative prices: the Brazilian experience, 1970/79.

Based on behaviour of output growth and industrial sector prices, it tries to define the several stages comprising the cyclic trends of the Brazilian economy. Analyzes the behaviour of inflation rates and of relative prices, and shows that there is a positive association between the measures of inflation rates and of their variables as well as between both these measures and dispersion of relative price changes. Demonstrates the assymetric behaviour of relative price changes and differentiated behaviour in relative prices of farm produce and industrial products. -from Authors

Preheating in quintessential inflation

We perform a numerical study of the preheating mechanism of particle production in models of quintessential inflation and compare it with the usual gravitational production mechanism. We find that even for a very small coupling between the inflaton field and a massless scalar field, g ≳ 10 -6, preheating dominates over gravitational particle production. Reheating temperatures in the range 10 4 ≲ T rh ≲ 10 15 GeV can be easily obtained. © 2003 Published by Elsevier B.V.

Quintessential inflation and non-oscillatory reheating model

A numerical study of the non-oscillatory reheating mechanism in a quintessential inflation context shows that high reheating temperature can be achieved compared with the usual reheating mechanism in which particles are produced gravitationally. We find that even for a very small coupling between the inflaton field and a massless scalar field, the non-oscillatory reheating production of particles dominates over the gravitational production mechanism. © 2004 Published by Elsevier B.V.

World inflation and foreign debt: the case of the improper deflator

Includes bibliography

Inflation and the variability of relative prices in the Caribbean: evidence from panel threshold models

Includes bibliography

Inflation and growth: a summary of experience in Latin America

Includes bibliography

Runaway inflation: experiences and options

Includes bibliography

Structural elements of spiralling inflation

Includes bibliography

Ecuador: the country's progress from chronic to moderate inflation

Includes bibliography

Central America: inflation and stabilization in the crisis and post-crisis eras

Includes bibliography

Central bank independence and its relationship to inflation

Includes bibliography

Relative prices in Latin America in periods of low inflation and structural change

Includes bibliography

The competitive real exchange-rate regime, inflation and monetary policy

Includes bibliography