There were produced gravitational waves during the cosmological inflation epoch in the evolution of the Universe. First step for obtaining the spectrum is to do the perturbation of action, which composes from Einstein-Hilbert action and the action for scalar field.
I was studying theoretical physics at the Charles university in Prague. I am interested in quantum gravity and cosmology. Other my activity is playing the piano. I regularly give concerts. My favourite authors are S. Rachmaninoff, A. Scriabin and J. S. Bach. You could find more informations at www.classicalprague.cz or hraniprohrani.cz. View all posts by johnynew