Bose, S., Mazumdar, A., Schut, M. and Toroš, M. (2023) Entanglement witness for the weak equivalence principle. Entropy, 25(3), 448. (doi: 10.3390/e25030448)
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Abstract
The Einstein equivalence principle is based on the equality of gravitational and inertial mass, which has led to the universality of a free-fall concept. The principle has been extremely well tested so far and has been tested with a great precision. However, all these tests and the corresponding arguments are based on a classical setup where the notion of position and velocity of the mass is associated with a classical value as opposed to the quantum entities.Here, we provide a simple quantum protocol based on creating large spatial superposition states in a laboratory to test the quantum regime of the equivalence principle where both matter and gravity are treated at par as a quantum entity. The two gravitational masses of the two spatial superpositions source the gravitational potential for each other. We argue that such a quantum protocol is unique with regard to testing especially the generalisation of the weak equivalence principle by constraining the equality of gravitational and inertial mass via witnessing quantum entanglement.
| Item Type: | Articles |
|---|---|
| Additional Information: | S.B. would like to acknowledge EPSRC grants No. EP/N031105/1 and EP/S000267/1 and grant ST/W006227/1. AM’s research is funded by the Netherlands Organisation for Science and Research (NWO) grant number 680-91-119. M.S. is supported by the Fundamentals of the Universe research programme within the University of Groningen. MT acknowledges funding by the Leverhulme Trust (RPG-2020-197). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Toros, Dr Marko |
| Creator Roles: | |
| Authors: | Bose, S., Mazumdar, A., Schut, M., and Toroš, M. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Entropy |
| Publisher: | MDPI |
| ISSN: | 1099-4300 |
| ISSN (Online): | 1099-4300 |
| Published Online: | 03 March 2023 |
| Copyright Holders: | Copyright © 2023 The Authors |
| First Published: | First published in Entropy 25(3): 448 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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