2021/02/03 by Daniel Berkowitz, Berkowitz, Daniel
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Mathematical Physics (math-ph) #Noncommutative and Quantum Gravity Theories #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2102.02343
openalex publication_date 2021/02/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the quantum cosmologies of the Bianchi IX and VIII models when a cosmological constant, aligned electromagnetic field and free scalar field are present. The conserved quantity pϕ associated with our free scalar field results in ϕ classically being a quantity which monotonically increases with respect to time, thus allowing it to fulfill the role of an 'emergent' internal clock for our constrained quantum systems. We embark on this investigation to better understand how matter sources can affect general anisotropic quantum cosmologies. To aid us we use the Euclidean-signature semi classical method to obtain our wave functions and analyze them. In addition we study briefly the quantum Taub models when an e ϕ potential and aligned electromagnetic field are present. One of the interesting things we found was that our aligned electromagnetic field, depending on how strong it is, can create or destroy geometric states in our 'excited' state wave functions that quantum Bianchi IX universes can tunnel in and out of. This creation of a state is somewhat similar to how non-commutativity in the minisuperspace variables can cause new quantum states to emerge in the quantum Kantowski-Sachs and Bianchi I models. Our results further show the utility of the Euclidean-signature semi classical method towards tackling Lorentzian signature problems without having to invoke a Wick rotation. This feature of not needing to apply a Wick rotation makes this method potentially very useful for tackling a variety of problems in bosonic relativistic field theory and quantum gravity.