The Spacetime Metric

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Allocca and colleagues describe a room-temperature beam balance that prototypes the cryogenic balance of the Archimedes experiment, which aims to measure how electromagnetic vacuum fluctuations interact with gravity. It has a 50 cm aluminium arm carrying a 0.2 kg aluminium sample and a lead counterweight, with interferometric closed-loop readout in the low-seismic-noise SAR-GRAV laboratory in Sardinia. Torque sensitivity reaches about 7 × 10^-13 N m per root hertz at tens of millihertz. Matching the thermal noise estimate, this confirms the optical and mechanical design and clears the way to the final balance. Because weight and counterweight are different materials, the balance also senses B-L dark photons, and a first short run gave encouraging constraints.

Thermal noise-limited beam balance as prototype of the Archimedes vacuum weight experiment

  1. Annalisa Allocca(Author)
  2. Saverio Avino(Author)
  3. Enrico Calloni(Author)
  4. Sergio Caprara(Author)
  5. Massimo Carpinelli(Author)
  6. Andrea Contu(Author)
  7. Luca D’Onofrio(Author)
  8. Domenico D’Urso(Author)
  9. Rosario De Rosa(Author)
  10. L. Errico(Author)
  11. Marina Esposito(Author)
  12. Gianluca Gagliardi(Author)
  13. Marco Grilli(Author)
  14. Valentina Mangano(Author)
  15. Maria Marsella(Author)
  16. Luca Naticchioni(Author)
  17. Antonio Pasqualetti(Author)
  18. Gianpiero Pepe(Author)
  19. Maurizio Perciballi(Author)
  20. Paola Puppo(Author)
  21. Piero Rapagnani(Author)
  22. Fulvio Ricci(Author)
  23. Luigi Rosa(Author)
  24. Carlo Rovelli(Author)
  25. Davide Rozza(Author)
  26. Paolo Ruggi(Author)
  27. Naurang L. Saini(Author)
  28. Valeria Sequino(Author)
  29. Valeria Sipala(Author)
  30. Daniela Stornaiuolo(Author)
  31. Francesco Tafuri(Author)
  32. Lucia Trozzo(Author)

Publication and identifiers

Work type
Paper
Year
2024
Identifiers
Original source links

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Recorded rights status
Open license
Rights holder
Springer Science and Business Media LLC

Citation fields

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Original title
Thermal noise-limited beam balance as prototype of the Archimedes vacuum weight experiment
Attribution
  1. Annalisa Allocca(Author)
  2. Saverio Avino(Author)
  3. Enrico Calloni(Author)
  4. Sergio Caprara(Author)
  5. Massimo Carpinelli(Author)
  6. Andrea Contu(Author)
  7. Luca D’Onofrio(Author)
  8. Domenico D’Urso(Author)
  9. Rosario De Rosa(Author)
  10. L. Errico(Author)
  11. Marina Esposito(Author)
  12. Gianluca Gagliardi(Author)
  13. Marco Grilli(Author)
  14. Valentina Mangano(Author)
  15. Maria Marsella(Author)
  16. Luca Naticchioni(Author)
  17. Antonio Pasqualetti(Author)
  18. Gianpiero Pepe(Author)
  19. Maurizio Perciballi(Author)
  20. Paola Puppo(Author)
  21. Piero Rapagnani(Author)
  22. Fulvio Ricci(Author)
  23. Luigi Rosa(Author)
  24. Carlo Rovelli(Author)
  25. Davide Rozza(Author)
  26. Paolo Ruggi(Author)
  27. Naurang L. Saini(Author)
  28. Valeria Sequino(Author)
  29. Valeria Sipala(Author)
  30. Daniela Stornaiuolo(Author)
  31. Francesco Tafuri(Author)
  32. Lucia Trozzo(Author)
Year
2024
Identifiers
Original source links