Atom-interferometric test of the universality of gravitational redshift and free fall

• URL: http://arxiv.org/abs/2001.09754v3
• Date: Tue, 17 Nov 2020 10:41:12 GMT
• Title: Atom-interferometric test of the universality of gravitational redshift and free fall
• Authors: Christian Ufrecht, Fabio Di Pumpo, Alexander Friedrich, Albert Roura, Christian Schubert, Dennis Schlippert, Ernst M. Rasel, Wolfgang P. Schleich, Enno Giese
• Abstract summary: 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.
• Score: 48.82541018696971
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. They are based on delocalised spatial superpositions and the combination with internal transitions directly links them to atomic clocks. Since classical tests of the gravitational redshift are based on a comparison of two clocks localised at different positions under gravity, it is promising to explore whether the aforementioned interferometers constitute a competitive alternative for tests of general relativity. Here we present a specific geometry which together with state transitions leads to a scheme that is concurrently sensitive to both violations of the universality of free fall and gravitational redshift, two premises of general relativity. The proposed interferometer does not rely on a superposition of internal states, but merely on transitions between them, and therefore generalises the concept of physical atomic clocks and quantum-clock interferometry. An experimental realisation seems feasible with already demonstrated techniques in state-of-the-art facilities.

Related papers

• Witnessing mass-energy equivalence with trapped atom interferometers [0.10686401485328585]
  We propose an experimental setup to probe the interplay between the quantum superposition principle and the gravitational time dilation arising from the mass-energy equivalence. It capitalizes on state-of-the-art atom interferometers that can keep atoms trapped in a superposition of heights in Earth's gravitational field for exceedingly long times reaching minute-scale.
  arXiv  Detail & Related papers  (2024-06-27T09:43:05Z)
• Universality-of-clock-rates test using atom interferometry with $T^{3}$ scaling [63.08516384181491]
  Atomic clocks generate delocalized quantum clocks. Tests of universality of clock rates (one facet of LPI) to atom interferometry generating delocalized quantum clocks proposed. Results extend our notion of time, detached from classical and localized philosophies.
  arXiv  Detail & Related papers  (2022-04-05T12:26:56Z)
• Measuring space-time curvature using maximally path-entangled quantum states [0.0]
  gravitational aspects of quantum experiments performed so far can be explained either within Newtonian gravity or by Einstein's equivalence principle. We show that the entanglement-induced increase in sensitivity also holds for gravitationally-induced phases in Mach-Zehnder interferometers.
  arXiv  Detail & Related papers  (2022-02-25T08:50:58Z)
• 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)
• Gravitational Redshift Tests with Atomic Clocks and Atom Interferometers [55.4934126700962]
  We characterize how the sensitivity to gravitational redshift violations arises in atomic clocks and atom interferometers. We show that contributions beyond linear order to trapping potentials lead to such a sensitivity of trapped atomic clocks. Guided atom interferometers are comparable to atomic clocks.
  arXiv  Detail & Related papers  (2021-04-29T15:07:40Z)
• Measuring gravitational time dilation with delocalized quantum superpositions [0.0]
  We present an interferometry scheme employing group-II-type atoms, such as Sr or Yb, capable of measuring the gravitational time dilation. The scheme relies on very simple atom optics for which high-diffraction efficiencies can be achieved with mild requirements on laser power. Remarkably, the recently commissioned VLBAI facility in Hannover, a 10-meter atomic fountain that can simultaneously operate Yb and Rb atoms, meets all the requirements for a successful experimental implementation.
  arXiv  Detail & Related papers  (2020-10-21T17:23:39Z)
• 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)
• 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.