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Ultra-high frequency gravitational waves: where to next ?

4–8 Dec 2023
CERN
Europe/Zurich timezone

TH workshop secretariat

Contribution List

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  1. 20. SRF cavities
    Sebastian Ellis (Universite de Geneve (CH))
    04/12/2023, 09:45
  2. 21. The MAGO cavity and prospects for HFGW searches
    Krisztian Peters (Deutsches Elektronen-Synchrotron (DE))
    04/12/2023, 10:15

    The former MAGO collaboration, led by INFN Genoa, developed in the past SRF cavities in order to perform R&D with the aim to search for gravitational waves. In a collaborative effort, DESY/U.Hamburg and Fermilab continues this R&D programme. Since July the MAGO cavity is at DESY for measurements and matching simulations to characterise the cavity before surface treatment and cold measurements...

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  3. 34. Q&A
    Valerie Domcke (CERN)
    04/12/2023, 10:40
  4. 30. SQMS
    Bianca Giaccone (Fermi National Accelerator Laboratory)
    04/12/2023, 11:30
  5. 19. Heterodyne detection
    Aldo Ejlli
    04/12/2023, 12:00
  6. 36. Q&A
    Valerie Domcke (CERN)
    04/12/2023, 12:30
  7. 22. Levitated sensor detectors
    Andrew Geraci
    05/12/2023, 09:30
  8. 23. Superradiance
    Jacob Sprague
    05/12/2023, 10:00
  9. 37. Q&A
    Valerie Domcke (CERN)
    05/12/2023, 10:30
  10. 24. Bulk Acoustic Wave devices
    Tommaso Tabarelli de Fatis (Universita & INFN, Milano-Bicocca (IT))
    05/12/2023, 11:30
  11. 12. Partially-levitated membranes for high-frequency gravitational wave (HFGW) detection
    Christoph Reinhardt (DESY)
    05/12/2023, 12:00

    Patterned thin films that are freely suspended from a silicon chip (i.e., membranes) are some of the lowest-loss mechanical oscillators.

    As such, they provide an exceptional level of isolation from the noisy environment, similar to what has been achieved with levitated nanoparticles.

    Here, I will present a concept for a HFGW detector, which corresponds to a Michelson interferometer with...

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  12. 9. Sensing High Frequency Gravitational Waves with Acoustic Resonators: an update on the MAGE experiment
    William Campbell
    05/12/2023, 12:15

    The Multimode Acoustic Gravitational wave Experiment (MAGE) is a high frequency gravitational wave detection experiment [1] that utilises quartz bulk acoustic wave resonators as precision strain sensors. In its first stage, the experiment features two near-identical quartz bulk acoustic wave resonators that act as strain antennas with spectral sensitivity as low as $6.6\times...

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  13. 38. Q&A
    Valerie Domcke (CERN)
    05/12/2023, 12:30
  14. 15. High-Frequency Gravitational Waves in Electromagnetic Waveguides
    Francesco Sorge
    05/12/2023, 14:30

    The interaction between a very-high-frequency gravitational wave (VHFGW) and an electromagnetic wave (EMW) in a rectangular waveguide is discussed in the weak field limit. The background EMW is assumed to be initially in the TE10 mode along the waveguide. It is then shown that a VHFGW, having the same frequency and direction of propagation of the EMW, induces through the waveguide a TE mode...

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  15. 5. Detecting single gravitons with quantum sensing
    Germain Tobar
    05/12/2023, 14:45

    The quantization of gravity is widely believed to result in gravitons -- particles of discrete energy that form gravitational waves. But their detection has so far been considered impossible. Here we show that signatures of single gravitons can be observed in laboratory experiments [1]. We show that stimulated and spontaneous single-graviton processes can become relevant for massive quantum...

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  16. 7. Graviton detection and the quantization of gravity
    Nicholas Llewellyn Rodd (CERN)
    05/12/2023, 15:00

    A key dividing line in the dark matter community is between the wave and particle regimes. This division can be applied to any bosonic state, and for gravitational energy density the boundary cuts right through the ultra-high frequency regime. I will discuss the implications of this for instruments looking to detect a signal in the regime where gravity is a dilute gas of gravitons, and explain...

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  17. 39. Q&A
    Valerie Domcke (CERN)
    05/12/2023, 15:15
  18. 26. Axion haloscopes
    Camilo Alfredo Garcia Cely (Technical University Munich)
    06/12/2023, 09:30
  19. 18. Searching for Axions and High-Frequency Gravitational Waves with ABRACADABRA-10cm
    Kaliroe Pappas (Massachusetts Institute of Technology, Laboratory For Nuclear Science)
    06/12/2023, 10:00

    ABRACADABRA-10cm has had great success as a lumped-element axion dark matter pathfinder experiment. Now, using the electrodynamics of gravitational waves and a simple change of pickup structures, we are using the ABRACADABRA detector to search for high-frequency gravitational wave in the kHz to MHz range. These higher frequencies may indicate signs of in-spiraling primordial black holes, or...

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  20. 40. Q&A
    Valerie Domcke (CERN)
    06/12/2023, 10:30
  21. 27. Atomic precision measurements
    Elina Fuchs
    06/12/2023, 11:30
  22. 28. Pulsed lasers
    Gianluca Gregori (University of Oxford)
    06/12/2023, 12:00
  23. 35. Q&A
    Valerie Domcke (CERN)
    06/12/2023, 12:30
  24. 31. Primordial black holes: a dark matter candidate in the ultra-high frequency gravitational wave window
    Gabriele Franciolini (CERN)
    06/12/2023, 14:00

    Primordial Black Holes might have originated in the early universe from the collapse of large overdensities and could constitute a sizeable portion of dark matter. Recently, they have gained considerable attention because of the various gravitational wave (GW) signatures associated with this scenario, making them testable with current and future GW experiments. In this talk, I will provide an...

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  25. 1. Prospects for HFGW searches with the axion experiments ALPS II and BabyIAXO
    Axel Lindner
    06/12/2023, 15:30

    At DESY in Hamburg, axions search experiments not relying on the dark matter paradigm are taking data (ALPS II) or have good prospects to start construction soon (BabyIAXO). Due to the similarity of axion-photon and GW-photon conversions in background magnetic fields, both experiments will also be sensitive to high frequency gravitational waves (HF-GW). The status of ALPS II and BabyIAXO as...

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  26. 17. Detection of high-frequency gravitational waves using high-energy pulsed lasers
    Georgios Vacalis
    06/12/2023, 16:00

    We propose a new method for detecting high-frequency gravitational waves (GWs) using high-energy pulsed lasers. Through the inverse Gertsenshtein effect, the interaction between a GW and the laser beam results in the creation of an electromagnetic signal. The latter can be detected using single-photon counting techniques. We present the minimal strain of a detectable GW which only depends on...

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  27. 41. Q&A
    Valerie Domcke (CERN)
    06/12/2023, 16:15
  28. 25. Magnetosphere conversion
    Tao Liu (The Hong Kong University of Science and Technology)
    07/12/2023, 09:30
  29. 46. comparing sensitivities
    Michael Tobar (The University of Western Australia)
    07/12/2023, 10:00
  30. 11. Ultra-high frequency gravitational waves from inflaton decay
    Anna Tokareva (Hangzhou Institute for Advanced Study & ICTP-AP Centre Beijing/Hangzhou)
    07/12/2023, 11:30

    Since the models of inflation compatible with CMB data require non-renormalizable inflaton potentials, it is natural to have extra couplings between inflaton and gravitons. The suppression scale of such operators can well be lower than the Planck scale. Due to these couplings, inflaton can produce high frequency gravitons during reheating due to both decay and bremsstrahlung process. In my...

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  31. 2. High Temperature Effects in the Cosmic Gravitational Microwave Background
    Jan Schuette Engel (UC Berkeley)
    07/12/2023, 11:45

    The thermal plasma in the early universe produced a guaranteed stochastic gravitational wave (GW) background, which peaks today in the microwave regime and was dubbed the cosmic gravitational microwave background (CGMB). The CGMB spectrum encodes fundamental information about particle physics and gravity at ultra high energies. In particular, one can determine from the CGMB spectrum the...

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  32. 13. Towards coordinate independent estimates for electro-magnetic GW detectors
    Wolfram Ratzinger (Weizmann Institute)
    07/12/2023, 12:00

    There has recently been an increased interest in electro-magnetic GW detectors, due to the first detections of GWs and the rapid evolution of the technology driven by searches for light dark matter. The question how to calculate the response of e.g. a cavity to a GW has been debated since the 80s and the current understanding is that the usage of a special frame, the proper detector frame, is...

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  33. 42. Q&A
    Valerie Domcke (CERN)
    07/12/2023, 12:15
  34. 32. Overview of magnon-based concepts
    Asuka Ito (Tokyo institute of technology)
    07/12/2023, 14:30
  35. 33. A new gravitational wave plotter
    Carlos Tamarit (Technische Universität München)
    07/12/2023, 14:45
  36. 43. Q&A
    Valerie Domcke (CERN)
    07/12/2023, 15:00
  37. 8. Gravitational waves from high-power twisted light
    Killian MARTINEAU (Laboratoire de Physique Subatomique et de Cosmologie)
    08/12/2023, 09:30

    Recent advances in high-energy and high-peak-power laser systems have opened up new possibilities for fundamental physics research.
    I propose to discuss the potential of twisted light for the generation of gravitational waves in the high frequency regime.
    Focusing on Bessel beams, analytic expressions and numerical computations for the generated metric perturbations and associated powers...

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  38. 3. Bremsstrahlung High-frequency Gravitational Wave Signatures of High-scale Non-thermal Leptogenesis
    Anish Ghoshal
    08/12/2023, 09:45

    Inflaton seeds non-thermal leptogenesis by pair producing right-handed neutrinos in the seesaw model. We show that the inevitable graviton bremsstrahlung associated with inflaton decay can be a unique probe of non-thermal leptogenesis. The emitted gravitons contribute to a high-frequency stochastic gravitational waves background with a characteristic fall-off below the peak frequency. Besides...

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  39. 6. Detection of ultra high frequency gravitational waves from compact binary coalescenses with resonant cavities
    Prof. Juan Garcia-Bellido (IFT-UAM/CSIC)
    08/12/2023, 10:00

    In this talk I will try to clarify the situation about astrophysical sources that might be observed with haloscope experiments like GrAHal, sensitive to gravitational waves in the 1-10 GHz band. The GrAHal setup is taken as a benchmark. We follow a very pedagogical path so that the full analysis can easily be used by the entire community who might not be familiar with the theoretical...

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  40. 44. Q&A
    Valerie Domcke (CERN)
    08/12/2023, 10:15
  41. 29. Mega- Hertz Gravitational Waves from Neutron Star Mergers
    Mikel Sanchez-Garitaonandia
    08/12/2023, 11:30