Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 91: Special Session: Quantum Information Concepts in Astrophysics

FM 91.3: Invited Talk

Freitag, 27. September 2019, 12:20–13:00, 2006

Collective excitations as quantum sensors for fundamental physics — •Ivette Fuentes — School of Mathematical Sciences, University of Nottingham, UK

Quantum sensors that are used to measure gravitational fields and detect dark energy typically use single particle interferometric techniques that are limited by the time of flight in the interferometer arm. In this talk I will present a new detection method that uses quantum resonances and the sensitivity of collective excitations (phonons) to gravitational fields. When phonons in a Bose-Einstein condensate are initially prepared in a squeezed state, spacetime distortions can create additional excitations through parametric amplification. This effect can be used to detect gravitational waves at high frequencies. We have also developed a phonon based scheme to estimate spacetime parameters, miniaturize devices to measure gravitational fields and gradients and set further constrains on dark energy models.