Ultra-High-Frequency Gravitational Waves


Background plot generated at gwplotter.com

Join the UHF-GW google group and stay up to date on the next steps of the initiative!

Goals of the initiative

The first direct detection of gravitational waves by the LIGO and VIRGO collaborations has spawned new avenues for the exploration of the Universe. Currently operating and planned gravitational wave detectors mostly focus on the frequency range below 10 kHz, where signatures from the known astrophysical sources are expected to be discovered. However, based on what happens with the electromagnetic spectrum, there may well be interesting physics to be discovered at every scale of the gravitational wave frequencies. Gravitational waves at frequencies higher than 10 kHz are bound to be sourced by some phenomenon involving beyond the Standard Model physics, such as exotic astrophysical objects or cosmological events in the early Universe. In particular, several cosmological sources - for instance preheating after inflation and phase transitions at high energies - would leave their imprint in the gravitational wave spectrum at frequencies around the GHz. Hence, the search for gravitational waves at frequencies above the LIGO/VIRGO range is a promising and challenging search for new physics, providing an opportunity to test many theories beyond the Standard Model, that could not be tested otherwise.

The UHF-GW (Ultra-High-Frequency Gravitational Wave) initiative promotes the creation of a network of researchers for the development of gravitational wave science in the frequency range above 10 kHz. We strongly believe that a fruitful collaboration between experimentalists and theorists is necessary to make progress in this quest and we facilitate it by organising meetings and workshops aimed at putting in contact these two worlds. One of the goals of the initiative is to support the testing phase of currently existing detector proposals and stimulate the technological developments necessary to come up with new schemes for gravitational wave detectors at frequencies above 10 kHz.

Workshop Announcement - Ultra-High-Frequency Gravitational Waves: A Theory and Technology Roadmap

On behalf of the Ultra-High-Frequency Gravitational Wave working group it is a great pleasure to invite you to participate in the International Online Workshop “Ultra-High-Frequency Gravitational Waves: A Theory and Technology Roadmap” that will be held online from 12th to 15th October 2021. Registration is now open here. This workshop is part of the Ultra-High-Frequency Gravitational Waves initiative and comes after a first meeting held at ICTP in Trieste in 2019 (see the website of the first workshop) that led to a thorough review paper on the subject.

The aim of this meeting is to foster the technology development that is necessary to get to ultra-high-frequency gravitational wave detection. In particular, we will discuss:

1. the science case for UHF-GW searches;
2. new detector concepts;
3. feasibility studies and construction of prototypes for proposed detector concepts;
4. coordinating an international effort to support collaborations working on UHF-GW detectors.

The workshop will combine theoretical developments regarding GW sources in different parts of the ultra-high-frequency band with experimental concepts aiming at probing them.

Each day we will have a discussion session with the aim of setting up working groups around one or more detector concepts and/or theoretical aspects of sources, which will be encouraged to continue their work after the end of the workshop, hopefully contributing to the technology development that is needed to make concrete progress in the field.

The registration is now open at the following indico page: https://indi.to/UHF-GW.  We have also reserved a limited number of slots for contributed talks: if you would like to give a presentation please contact the organisers indicating a title and abstract. We will let you know whether we can fit your proposal in the schedule.

The main part of the program will be in the afternoons of central European time zone, but recorded talks and an asynchronous discussion platform will enable active participation from all time zones.

We would appreciate if you could circulate this announcement within your department and potentially interested colleagues.

We hope to see you at the meeting.

Members of the initiative:

  • Nancy Aggarwal
    Affiliation: Center for Fundamental Physics; Centre for Interdisciplinary Exploration and Research in Astrophysics (CIERA); Department of Physics and Astronomy, Northwestern University.
    Contact: nancy[dot]aggarwal[at]northwestern[dot]edu
  • Mike Cruise
    Affiliation: University of Birmingham.
    Contact: cruiseam1[at]gmail[dot]com
  • Valerie Domcke
    Affiliation: CERN; Laboratory for Particle Physics and Cosmology, EPFL, Lausanne.
    Contact: valerie[dot]domcke[at]cern[dot]ch
  • Francesco Muia
    Affiliation: The Stephen Hawking Centre for Theoretical Cosmology; DAMTP, University of Cambridge.
    Contact: fm538[at]cam[dot]ac[dot]uk
  • Fernando Quevedo
    Affiliation: The Stephen Hawking Centre for Theoretical Cosmology; DAMTP, University of Cambridge.
    Contact: fq201[at]damtp[dot]cam[dot]ac[dot]uk
  • Andreas Ringwald
    Affiliation: Deutsches Elektronen-Synchrotron DESY, Hamburg.
    Contact: andreas[dot]ringwald[at]desy[dot]de
  • Jessica Steinlechner
    Affiliation: Maastricht University; Nikhef, Amsterdam; SUPA, School of Physics and Astronomy, University of Glasgow.
    Contact: jessica[dot]steinlechner[at]maastrichtuniversity[dot]nl
  • Sebastian Steinlechner
    Affiliation: Maastricht University; Nikhef, Amsterdam.
    Contact: s[dot]steinlechner[at]maastrichtuniversity[dot]nl

Challenges and Opportunities of High Frequency Gravitational Wave Detection

Details of our October 2019 workshop in Trieste can be found here:

http://indico.ictp.it/event/9006/

The workshop was summarised in the following paper:

https://arxiv.org/abs/2011.12414

Keynote speakers

Short contributions

Summary and final discussion

Keynote speakers

Prof. Odylio D. Aguiar, Instituto Nacional de Pesquisas Espaciais (INPE), Sao Paulo, Brazil
The Schenberg Gravitational Wave Antenna: a resonant mass spherical antenna
Slides
Video

Prof. Andreas Bauswein, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
Neutron star mergers and kHz gravitational wave emission
Slides
Video

Prof. Mike Cruise, School of Physics and Astronomy, University of Birmingham, Birmingham, UK
Strategies for GW science above 1GHz
Slides
Video

Prof. Daniel G. Figueroa, Instituto de Fisica Corpuscular (IFIC), University of Valencia, Valencia, Spain
Introduction to cosmological sources of high frequency gravitational waves
Slides
Video

Prof. Andrew Geraci, Center for Fundamental Physics, Department of Physics and Astronomy, Northwestern University, Evanston, USA
Detecting high-frequency gravitational waves with optically levitated sensors
Slides
Video

Dr. Maxim Goryachev, ARC Centre of Excellence for Engineered Quantum Systems, Department of Physics, University of Western Australia, Crawley, Australia
High Frequency Gravitational Wave Detection with Bulk Acoustic Devices: From Technology to First Data
Slides
Video

Prof. Hartmut Grote, Cardiff University, Cardiff, UK
Experimental upper limits on (ultra) high frequency gravitational waves and prospects for more: Magnetic conversion detection and correlated interferometry
Slides
Video

Prof. Mark Hindmarsh, Department of Physics and Helsinki Institute of Physics, Helsinki, Finland; Department of Physics and Astronomy, University of Sussex, Brighton, UK
Gravitational Waves from Phase Transitions
Slides
Video

Prof. David Ottaway, Department of Physics, School of Physical Sciences and The Institute of Photonics and Advanced Sensing (IPAS), University of Adelaide, Adelaide, Australia; Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav)
OzGrav HF: A detector for studying nuclear matter at extreme pressure, temperature and density
Slides
Video

Prof. Marco Peloso, Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova, Padova, Italy; INFN, Sezione di Padova, Italy
Gravitational Waves from Inflation and Primordial Black Holes
Slides
Video

Short contributions

Dr. Francisco Torrenti, Department of Physics, University of Basel, Basel, Switzerland
Gravitational waves from preheating: parameter dependence
Slides
Video

Dr. Toby Opferkuch, CERN, Geneva, Switzerland
Gravitational Imprints of Flavour Hierarchies
Slides
Video

Prof. Seyed M. S. Movahed, Department of Physics, Shahid Beheshti University, Tehran, Iran
A pipeline for searching Stochastic Gravitational Wave by Pulsar Timing Residuals
Slides
Video

Summary and final discussion

Discussion: How to move forward?
Slides
Video