Rostock 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 53: Quantum Optics and Photonics III
Q 53.8: Vortrag
Donnerstag, 14. März 2019, 15:45–16:00, S Gr. HS Maschb.
Analogue of cosmological particle creation in electromagnetic waveguides — •Sascha Lang1,2 and Ralf Schützhold1,3 — 1Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 2Fakultät für Physik, Universität Duisburg-Essen, 47057 Duisburg, Germany — 3Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany
Quantum field theory in curved space-time predicts a mechanism of pair-wise particle creation to occur in expanding universes. However, an analogous phenomenon emerging in waveguide structures with fixed spatial dimensions but a time-dependent speed of light v(t) is more accessible in actual laboratory experiments.
In this talk, we discuss the dynamics of an electromagnetic waveguide that can be described as an effective arrray of identical LC-circuits. Changing the characteristic inductivity L for all loops under consideration alters the effective speed of light v(t) inside the sample and triggers a creation of photon pairs.
The number of particles produced by this mechanism is of second order in the perturbation Δ v(t). The two-point correlation for the effective field inside the waveguide shows a characteristic imprint that clearly reflects the occurrence of pair creation. Since the expected pattern has an amplitude proportional to Δ v(t), we propose to study two-point correlations in future experiments on analogue cosmological particle creation.