Testing gravity with cold atom interferometry: Results and prospects

• URL: http://arxiv.org/abs/2009.01484v3
• Date: Tue, 5 Jan 2021 11:06:44 GMT
• Title: Testing gravity with cold atom interferometry: Results and prospects
• Authors: Guglielmo M. Tino
• Abstract summary: Atom interferometers have been developed in the last three decades as powerful tools to investigate gravity. I describe past and ongoing experiments with an outlook on what I think are the main prospects in this field and the potential to search for new physics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Atom interferometers have been developed in the last three decades as new powerful tools to investigate gravity. They were used for measuring the gravity acceleration, the gravity gradient, and the gravity-field curvature, for the determination of the gravitational constant, for the investigation of gravity at microscopic distances, to test the equivalence principle of general relativity and the theories of modified gravity, to probe the interplay between gravitational and quantum physics and to test quantum gravity models, to search for dark matter and dark energy, and they were proposed as new detectors for the observation of gravitational waves. Here I describe past and ongoing experiments with an outlook on what I think are the main prospects in this field and the potential to search for new physics.

Related papers

• Proposal for a Quantum Mechanical Test of Gravity at Millimeter Scale [11.799047242336727]
  We propose a novel experiment that utilizes the Josephson effect to detect the different evolution of quantum phase induced from the potential difference caused by gravity. We demonstrate that this experiment can test gravity quantum mechanically at the millimeter scale, and also has a potential to investigate the parity invariance of gravity at small scales.
  arXiv  Detail & Related papers  (2024-05-25T13:27:28Z)
• Quantum effects in gravity beyond the Newton potential from a delocalised quantum source [0.9405321764712891]
  We show for the first time that gravity is not compatible with a classical description. Experiments such as the generation of gravitationally induced entanglement between two quantum sources of gravity can be explained with the Newton potential.
  arXiv  Detail & Related papers  (2024-02-15T19:33:04Z)
• Testing the nonclassicality of gravity with the field of a single delocalized mass [55.2480439325792]
  A setup is proposed that is based on a single delocalized mass coupled to a harmonically trapped test mass. We investigate the in-principle feasibility of such an experiment, which turns out to crucially depend on the ability to tame Casimir-Polder forces.
  arXiv  Detail & Related papers  (2023-07-18T15:40:16Z)
• Inference of gravitational field superposition from quantum measurements [1.7246954941200043]
  In non-relativistic quantum mechanics, the gravitational field in such experiments can be written as a superposition state. We empirically demonstrate that alternative theories of gravity can avoid gravitational superposition states. Proposed experiments with superposed gravitational sources would provide even stronger evidence that gravity is nonclassical.
  arXiv  Detail & Related papers  (2022-09-06T04:37:07Z)
• Light propagation and atom interferometry in gravity and dilaton fields [58.80169804428422]
  We study the modified propagation of light used to manipulate atoms in light-pulse atom interferometers. Their interference signal is dominated by the matter's coupling to gravity and the dilaton. We discuss effects from light propagation and the dilaton on different atom-interferometric setups.
  arXiv  Detail & Related papers  (2022-01-18T15:26:19Z)
• Can we detect the quantum nature of weak gravitational fields? [0.0]
  An experimental answer to the question of the quantization of gravity is of renewed interest in the era of gravitational wave detectors. We review and investigate an important subset of quantum gravity, detecting quantum signatures of weak gravitational fields in table-top experiments and interferometers.
  arXiv  Detail & Related papers  (2021-10-06T07:21:09Z)
• Resolving the gravitational redshift within a millimeter atomic sample [94.94540201762686]
  Einstein's theory of general relativity states that clocks at different gravitational potentials tick at different rates. We measure a linear frequency gradient consistent with the gravitational redshift within a single millimeter scale sample of ultracold strontium.
  arXiv  Detail & Related papers  (2021-09-24T23:58:35Z)
• Bose-Einstein condensates in microgravity and fundamental tests of gravity [0.0]
  Light-pulse atom interferometers are highly sensitive to inertial and gravitational effects. Light-pulse atom interferometers are promising candidates for tests of gravitational physics.
  arXiv  Detail & Related papers  (2021-07-08T09:37:42Z)
• Gravitational waves affect vacuum entanglement [68.8204255655161]
  The entanglement harvesting protocol is an operational way to probe vacuum entanglement. Using this protocol, it is demonstrated that while the transition probability of an individual atom is unaffected by the presence of a gravitational wave, the entanglement harvested by two atoms depends sensitively on the frequency of the gravitational wave. This suggests that the entanglement signature left by a gravitational wave may be useful in characterizing its properties, and potentially useful in exploring the gravitational-wave memory effect and gravitational-wave induced decoherence.
  arXiv  Detail & Related papers  (2020-06-19T18:01:04Z)
• Atom-interferometric test of the universality of gravitational redshift and free fall [48.82541018696971]
  Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. We present a specific geometry which together with state transitions leads to a scheme that is sensitive to both violations of the universality of free fall and gravitational redshift.
  arXiv  Detail & Related papers  (2020-01-27T13:35:30Z)
• Proposal for an optical interferometric measurement of the gravitational red-shift with satellite systems [52.77024349608834]
  Einstein Equivalence Principle (EEP) underpins all metric theories of gravity. The iconic gravitational red-shift experiment places two fermionic systems, used as clocks, in different gravitational potentials. A fundamental point in the implementation of a satellite large-distance optical interferometric experiment is the suppression of the first-order Doppler effect. We propose a novel scheme to suppress it, by subtracting the phase-shifts measured in the one-way and in the two-way configuration between a ground station and a satellite.
  arXiv  Detail & Related papers  (2018-11-12T16:25:57Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.