Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 32: Transport: Quantum Coherence and Quantum Information Systems - Theory 2 (Joint session of HL, MA and TT, organized by TT)

HL 32.4: Vortrag

Dienstag, 8. März 2016, 14:45–15:00, H22

Quantum Simulation of Hawking Radiation With Surface Acoustic Waves — •Raphael Schmit, Bruno G. Taketani, and Frank K. Wilhelm — Saarland University, Theoretical Physics Departement

In 1975, Hawking predicted particles and light to leave the surface of a black hole. This so called Hawking radiation follows the thermal spectrum of a black body with a certain temperature, called Hawking temperature. Its investigation is extremely desired since scientists believe it to provide clues for unanswered questions like the trans-Planckian problem or the information paradox, but a direct observation is challenging since the Hawking temperature is too small or the distance to the black hole is too large. For this purpose, we propose an experimental setup for emulating a black hole and measuring its analogue Hawking radiation. The setup consists of two adjacent piezoelectric semiconducting layers, one of them carrying a flying qubit serving as detector for Hawking radiation, and the other one with an attached MOS diode structure, imposing an effective curved metric on the surface acoustic wave (SAW) propagation. In the moving reference frame of the flying qubit, this metric matches the Painlevé-Gullstrand-metric describing an uncharged, non-rotating black hole with an event horizon for SAWs. We show that for GaAs as used layer material, the system can possess Hawking radiation in the µK regime. The flying qubit interacts with the Hawking phonons via piezoelectrically induced photons, and thus can be used to measure the temperature of the Hawking phonons.