Nonclassical nature of thermal quantum states in the oscillating FRW Universe
Department of Physics, Malaviya National Institute of Technology, 302017, Jaipur, India
2 Department of Physics, Dayanand Sagar University, Bangalore, India
Accepted: 9 February 2021
Published online: 7 April 2021
We used coherent thermal and squeezed thermal vacuum states to represent the massive inflaton field in the semi-classical gravity; therefore, it would be useful to examine whether the field exhibits classical or nonclassical nature in the cosmological context. In the present article, we examine the non-classical nature of thermal quantum optical states in the cosmological context using Mandel’s parameter.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021