Gravitational Time Dilation As A Resource In Quantum Sensing

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Carlo Cepollaro^1,2,3, Flaminia Giacomini⁴, and Matteo G.A. Paris^5,6

¹Quantum Technology Lab, Dipartimento di Fisica Aldo Pontremoli, Università degli Studi di Milano, I-20133 Milano, Italy
²Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
³Institute of Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria
⁴Perimeter Institute for Theoretical Physics, 31 Caroline St. N, Waterloo, Ontario, N2L 2Y5, Canada
⁵Quantum Technology Lab, Dipartimento di Fisica Aldo Pontremoli, Università degli Studi di Milano, I-20133 Milano, Italy
⁶INFN, Sezione di Milano, I-20133 Milano, Italy

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Abstract

Atomic clock interferometers are a valuable tool to test the interface between quantum theory and gravity, in particular via the measurement of gravitational time dilation in the quantum regime. Here, we investigate whether gravitational time dilation may be also used as a resource in quantum information theory. In particular, we show that for a freely falling interferometer and for a Mach-Zehnder interferometer, the gravitational time dilation may enhance the precision in estimating the gravitational acceleration for long interferometric times. To this aim, the interferometric measurements should be performed on both the path and the clock degrees of freedom.

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Featured image: An atomic clock interferometer uses gravitational time dilation to improve measurement of the gravitational acceleration

Popular summary

Quantum mechanics and general relativity have revolutionized the way we understand the physical world, and have led to many technological advancements. In recent years, physicists have been exploring how these two theories can be combined to improve the accuracy of physical measurements. This paper investigates the idea that gravitational time dilation, a paradigmatic relativistic phenomenon, can be used in conjunction with quantum superpositions to enhance the precision of measuring the gravitational constant and its variations.

► BibTeX data

@article{Cepollaro2023gravitationaltime, doi = {10.22331/q-2023-03-13-946}, url = {https://doi.org/10.22331/q-2023-03-13-946}, title = {Gravitational time dilation as a resource in quantum sensing}, author = {Cepollaro, Carlo and Giacomini, Flaminia and Paris, Matteo G.A.}, journal = {{Quantum}}, issn = {2521-327X}, publisher = {{Verein zur F{“{o}}rderung des Open Access Publizierens in den Quantenwissenschaften}}, volume = {7}, pages = {946}, month = mar, year = {2023}<br /> }

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Cited by

[1] Germain Tobar, Simon Haine, Fabio Costa, and Magdalena Zych, “Mass-energy equivalence in gravitationally bound quantum states of the neutron”, Physical Review A 106 5, 052801 (2022).

The above citations are from SAO/NASA ADS (last updated successfully 2023-03-14 13:09:08). The list may be incomplete as not all publishers provide suitable and complete citation data.

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This Paper is published in Quantum under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Copyright remains with the original copyright holders such as the authors or their institutions.

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Source: https://quantum-journal.org/papers/q-2023-03-13-946/

Time Stamp: March 13, 2023

Time Stamp: Sep 11, 2023

Gravitational time dilation as a resource in quantum sensing

Republished By Plato

Abstract

Popular summary

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