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Updated: Aug 16, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Exact quantization of Einstein-Rosen waves coupled to massless scalar matter
J Fernando Barbero G1, Iñaki Garay, Eduardo J S Villaseñor
1Instituto de Estructura de la Materia, CSIC, Serrano 123, 28006 Madrid, Spain. fbarbero@iem.cfmac.csic.es
Abstract:
We show in this Letter that gravity coupled to a massless scalar field with full cylindrical symmetry can be exactly quantized by an extension of the techniques used in the quantization of Einstein-Rosen waves. This system provides a useful test bed to discuss a number of issues in quantum general relativity, such as the emergence of the classical metric, microcausality, and large quantum gravity effects. It may also provide an appropriate framework to study gravitational critical phenomena from a quantum point of view, issues related to black hole evaporation, and the consistent definition of test fields and particles in quantum gravity.
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