2025/02/27 by Leber, Nils, Rodríguez, Luis Adrián Alanís, Ferreri, Alessandro +2 · 1 citation
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Quantum Physics (quant-ph)
paper · doi:10.48550/arxiv.2502.20521
We analyze the domain of validity of a quantum optical model describing the effects of gravitational redshift on the quantum state of photons that propagate in curved spacetime. We find that the model is consistent for small redshift, but fails for larger redshifts. Surprisingly, the range of the redshift for which the model applies is conditional not only to the gravitational parameters, but also to those that define the photonic modes. We provide an analysis to characterize this aspect and propose a solution. Finally, we discuss implications for theoretical science as well as for the development of quantum technologies.