Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 2: QED
Q 2.2: Vortrag
Montag, 11. März 2024, 11:15–11:30, HS 1015
Correlations of the Quantum Vacuum in a Nontrivial Analogue Spacetime — •Cristofero Oglialoro1, Frieder Lindel2, Fabian Spallek1, and Stefan Yoshi Buhmann1 — 1University of Kassel, Germany — 2University of Freiburg, Germany
A fascinating aspect of quantum mechanics is that it predicts non-vanishing fluctuations in the electromagnetic ground state. Despite many macroscopic effects being attributed to this fluctuating vacuum field, it has only recently become possible to measure these fluctuations directly via electro-optic sampling. This allowed to access the two-point correlation function of the vacuum field at distinct spacetime regions and to study its spacetime structure [1]. The formalism of macroscopic quantum electrodynamics serves to describe field propagation within nonlinear dispersive media theoretically and predicts the traces of the quantum vacuum in the electro-optic sampling signal and its spacetime structure [2]. In this framework, we discuss how additional external fields alter the spacetime structure of the sampled vacuum fluctuations by interpreting the effects of the external field as a nontrivial analogue spacetime.
[1] F. F. Settembrini, et al., Nat. Commun. 13, 3383 (2022).
[2] F. Lindel, et al., Phys. Rev. A 102, 041701(R) (2020).
Keywords: Quantum vacuum fluctuations; Macroscopic QED; Nonlinear quantum optics