Hawking radiation on an analog white-black hole pair and its stimulated counterpart
by
Ivan Agullo, Louisiana State University, USA
The Hawking effect of spontaneous emission of thermal radiation by black holes is one of the most remarkable consequences of quantum field theory in curved spacetimes. It provides a deep connection between causal horizons and thermodynamics, whose full range is yet to be understood. It was further noticed by W. Unruh in 1981 that this relationship goes beyond causal horizons generated from gravitational effects—this observation gave birth to the exploration and experimental search of the Hawking effect in other systems, including Bose-Einstein condensates, optical systems, fluids, etc.
The weak intensity of the Hawking radiation makes its direct observation really challenging. Stimulating the process, as we do to generate intense laser beams, could be a promising avenue. However, the stimulated Hawking effect is commonly regarded as a purely classical process, of little value to amplify the quantum aspects of the Hawking effect. In this talk, we will argue otherwise, and describe a protocol to amplify and observe these quantum features, based on stimulating the process with non-classical inputs. Although our ideas are general, we formulated them in the context of optical systems containing the analog of a pair white-black holes. These results open the door to new possibilities of experimental verification of the Hawking effect.
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