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Sedmik RI, Bosina J, Achatz L, Geltenbort P, Heiß M, Ivanov AN, Jenke T, Micko J, Pitschmann M, Rechberger T, Schmidt P, Thalhammer M, Abele H. Proof of principle for Ramsey-type gravity resonance spectroscopy with qBounce. EPJ WEB OF CONFERENCES 2019. [DOI: 10.1051/epjconf/201921905004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ultracold neutrons (UCNs) are formidable probes in precision tests of gravity. With their negligible electric charge, dielectric moment, and polarizability they naturally evade some of the problems plaguing gravity experiments with atomic or macroscopic test bodies. Taking advantage of this fact, the qBounce collaboration has developed a technique – gravity resonance spectroscopy (GRS) – to study bound quantum states of UCN in the gravity field of the Earth. This technique is used as a high-precision tool to search for hypothetical Non-Newtonian gravity on the micrometer scale. In the present article, we describe the recently commissioned Ramsey-type GRS setup, give an unambiguous proof of principle, and discuss possible measurements that will be performed.
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Jenke T, Bosina J, Cronenberg G, Filter H, Geltenbort P, Ivanov AN, Micko J, Pitschmann M, Rechberger T, Sedmik RI, Thalhammer M, Abele H. Testing gravity at short distances: Gravity Resonance Spectroscopy with qBounce. EPJ WEB OF CONFERENCES 2019. [DOI: 10.1051/epjconf/201921905003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Neutrons are the ideal probes to test gravity at short distances – electrically neutral and only hardly polarizable. Furthermore, very slow, so-called ultracold neutrons form bound quantum states in the gravity potential of the Earth. This allows combining gravity experiments at short distances with powerful resonance spectroscopy techniques, as well as tests of the interplay between gravity and quantum mechanics. In the last decade, the qBounce collaboration has been performing several measurement campaigns at the ultracold and very cold neutron facility PF2 at the Institut Laue-Langevin. A new spectroscopy technique, Gravity Resonance Spectroscopy, was developed. The results were applied to test various Dark Energy and Dark Matter scenarios in the lab, like Axions, Chameleons and Symmetrons. This article reviews Gravity Resonance Spectroscopy, explains its key technology and summarizes the results obtained during the past decade.
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Abele H, Jenke T, Konrad G. Spectroscopy with cold and ultra-cold neutrons. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159305002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jenke T, Cronenberg G, Burgdörfer J, Chizhova LA, Geltenbort P, Ivanov AN, Lauer T, Lins T, Rotter S, Saul H, Schmidt U, Abele H. Gravity resonance spectroscopy constrains dark energy and dark matter scenarios. PHYSICAL REVIEW LETTERS 2014; 112:151105. [PMID: 24785025 DOI: 10.1103/physrevlett.112.151105] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Indexed: 06/03/2023]
Abstract
We report on precision resonance spectroscopy measurements of quantum states of ultracold neutrons confined above the surface of a horizontal mirror by the gravity potential of Earth. Resonant transitions between several of the lowest quantum states are observed for the first time. These measurements demonstrate that Newton's inverse square law of gravity is understood at micron distances on an energy scale of 10-14 eV. At this level of precision, we are able to provide constraints on any possible gravitylike interaction. In particular, a dark energy chameleon field is excluded for values of the coupling constant β>5.8×108 at 95% confidence level (C.L.), and an attractive (repulsive) dark matter axionlike spin-mass coupling is excluded for the coupling strength gsgp>3.7×10-16 (5.3×10-16) at a Yukawa length of λ=20 μm (95% C.L.).
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Affiliation(s)
- T Jenke
- Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Wien, Austria
| | - G Cronenberg
- Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Wien, Austria
| | - J Burgdörfer
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - L A Chizhova
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - P Geltenbort
- Institut Laue-Langevin, BP 156, 6 Rue Jules Horowitz, 38042 Grenoble Cedex 9, France
| | - A N Ivanov
- Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Wien, Austria
| | - T Lauer
- FRM II, Technische Universität München, Lichtenbergstraße 1, 85748 Garching, Germany
| | - T Lins
- Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Wien, Austria
| | - S Rotter
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - H Saul
- Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Wien, Austria
| | - U Schmidt
- Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany
| | - H Abele
- Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Wien, Austria
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Chizhova LA, Rotter S, Jenke T, Cronenberg G, Geltenbort P, Wautischer G, Filter H, Abele H, Burgdörfer J. Vectorial velocity filter for ultracold neutrons based on a surface-disordered mirror system. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:032907. [PMID: 24730913 DOI: 10.1103/physreve.89.032907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Indexed: 06/03/2023]
Abstract
We perform classical three-dimensional Monte Carlo simulations of ultracold neutrons scattering through an absorbing-reflecting mirror system in the Earth's gravitational field. We show that the underlying mixed phase space of regular skipping motion and random motion due to disorder scattering can be exploited to realize a vectorial velocity filter for ultracold neutrons. The absorbing-reflecting mirror system proposed allows beams of ultracold neutrons with low angular divergence to be formed. The range of velocity components can be controlled by adjusting the geometric parameters of the system. First experimental tests of its performance are presented. One potential future application is the investigation of transport and scattering dynamics in confined systems downstream of the filter.
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Affiliation(s)
- L A Chizhova
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria, EU
| | - S Rotter
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria, EU
| | - T Jenke
- Institute of Atomic and Subatomic Physics, Vienna University of Technology, Stadionallee 2, 1020 Vienna, Austria, EU
| | - G Cronenberg
- Institute of Atomic and Subatomic Physics, Vienna University of Technology, Stadionallee 2, 1020 Vienna, Austria, EU
| | - P Geltenbort
- Institut Laue-Langevin, BP 156, 6, rue Jules Horowitz, 38042 Grenoble Cedex 9, France, EU
| | - G Wautischer
- Institute of Atomic and Subatomic Physics, Vienna University of Technology, Stadionallee 2, 1020 Vienna, Austria, EU
| | - H Filter
- Institute of Atomic and Subatomic Physics, Vienna University of Technology, Stadionallee 2, 1020 Vienna, Austria, EU
| | - H Abele
- Institute of Atomic and Subatomic Physics, Vienna University of Technology, Stadionallee 2, 1020 Vienna, Austria, EU
| | - J Burgdörfer
- Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria, EU
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