2024/07/18 by Dhwani Gangal, Gangal, Dhwani, Sudhava Yadav +3 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Quantum Electrodynamics and Casimir Effect #Statistical Mechanics and Entropy
paper · pdf · doi:10.48550/arxiv.2407.13409
openalex publication_date 2024/07/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study non-classical inflaton, which is minimally coupled to the semiclassical gravity in FRW universe in Coherent Squeezed Vacuum State (CSVS). We determined Oscillatory phase of inflaton, power-law expansion, scale factor, density fluctuations, quantum fluctuations and particle production for CSVS. We obtained an estimated leading solution of scale factor in CSVS proportional to t2/3 follow similar diversification as demonstrated by Semiclassical Einstein Equation (SCEE) of gravity in matter dominated universe. We also studied the validity of SCEE in CSVS. By determining the quantum fluctuation for CSVS validity of uncertainty relation for FRW Universe also computed. The results shows that Quantum fluctuations doesn't depend on coherent parameter Υ as uncertainty relation doesn't effected by the displacement of Υ in phase space. We study the production of particles in CSVS for oscillating massive inflaton in flat FRW universe.