Germain Tobar PhD fellow
Contact
Name and title: Germain TobarPhD fellow
Workplace: Department of Physics Länk till annan webbplats.
Visiting address Room A4:1011Roslagstullsbacken 21
Postal address Fysikum106 91 Stockholm
About me
Researcher in the low energy interface of gravity and quantum mechanics. Proposing novel methods to bring traditionally abstract theoretical physics within reach of realistic experiments.
I joined Magdalena's group in 2023 as a PhD student, after studying Part III of the Mathematical Tripos in Cambridge, as well as undergraduate studies at the University of Queensland.
One of my main recent lines of recent research involves graviton detection - we developed novel methods for how modifying gravitational wave detectors with read-out in particle number basis enables single graviton detection (a gravitational version of the photo-electric effect): nature.com/articles/s41467-024-51420-8.
My second line of recent research focuses on quantum-enhanced vacuum particle production with quantum metasurfaces, examining tests of the dynamical Casimir effect with highly non-perturbative boundary condition changes: arxiv.org/abs/2503.03838.
Github: https://github.com/gtobarSU
ORCID: 0000-0002-4605-9716
Google Scholar: https://scholar.google.com/citations?user=5hZwwPIAAAAJ&hl=en
https://www.nature.com/articles/s41467-024-51420-8
In this work, we developed a theoretical framework for how gravitational wave detectors with read-out in particle number basis can implement a gravitational version of the photo-electric effect.
https://journals.aps.org/prresearch/abstract/10.1103/6dzy-4c45
In this work we developed a theoretical framework describing gravitational wave detectors driven by quantised gravitational radiation undergoing continuous measurement. It further clarifies that interferometric detectors such as the LIGO/VIRGO/KAGRA interferometers can also implement a gravitational version of the photo-electric effect.
https://iopscience.iop.org/article/10.1088/1361-6382/adae4a
In this work we analysed the transduction of the signal for single gravitons to the end mass of a multi-mode resonant mass detector, and computed the signal from the untested kHz post-merger.
https://www.sciencedirect.com/science/article/pii/S0370269325005465
Here we provide a pedagogical outline for how all core signatures of the photo-electric effect can be replicated in gravitational wave detectors, mirroring Lamb and Scully's paper for photons.
https://arxiv.org/abs/2503.03838
In this work, we developed a theoretical framework for how a quantum metasurface in a photonic cavity can implement the dynamical Casimir effect with highly non-perturbative boundary condition changes that effectively splits a photonic cavity into two.