GRASIAN: Towards the first demonstration of gravitational quantum states of atoms with a cryogenic hydrogen beam - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue The European Physical Journal D : Atomic, molecular, optical and plasma physics Année : 2023

GRASIAN: Towards the first demonstration of gravitational quantum states of atoms with a cryogenic hydrogen beam

Carina Killian
  • Fonction : Auteur
Zakary Burkley
  • Fonction : Auteur
Philipp Blumer
  • Fonction : Auteur
Paolo Crivelli
  • Fonction : Auteur
Fredrik Gustafsson
  • Fonction : Auteur
Otto Hanski
  • Fonction : Auteur
Amit Nanda
  • Fonction : Auteur
Francois Nez
Martin Simon
  • Fonction : Auteur
Sergey Vasiliev
  • Fonction : Auteur
Eberhard Widmann
  • Fonction : Auteur

Résumé

At very low energies, a light neutral particle above a horizontal surface can experience quantum reflection. The quantum reflection holds the particle against gravity and leads to gravitational quantum states (GQS). So far, GQS were only observed with neutrons as pioneered by Nesvizhevsky and his collaborators at ILL. However, the existence of GQS is predicted also for atoms. The GRASIAN-collaboration pursues the first observation and studies of GQS of atomic hydrogen. We propose to use atoms in order to exploit the fact that orders of magnitude larger fluxes compared to those of neutrons are available. Moreover, recently the qBounce collaboration, performing GQS spectroscopy with neutrons, reported a discrepancy between theoretical calculations and experiment which deserves further investigations. For this purpose, we set up a cryogenic hydrogen beam at 6 K. We report on our preliminary results, characterizing the hydrogen beam with pulsed laser ionization diagnostics at 243 nm.

Dates et versions

hal-03991097 , version 1 (15-02-2023)

Identifiants

Citer

Carina Killian, Zakary Burkley, Philipp Blumer, Paolo Crivelli, Fredrik Gustafsson, et al.. GRASIAN: Towards the first demonstration of gravitational quantum states of atoms with a cryogenic hydrogen beam. The European Physical Journal D : Atomic, molecular, optical and plasma physics, 2023, 77 (3), pp.50. ⟨10.1140/epjd/s10053-023-00634-4⟩. ⟨hal-03991097⟩
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