Bose, Sougato;
Mazumdar, Anupam;
Schut, Martine;
Toroš, Marko;
(2023)
Entanglement Witness for the Weak Equivalence Principle.
Entropy
, 25
(3)
, Article 448. 10.3390/e25030448.
Preview |
Text
Entanglement Witness for the Weak Equivalence Principle.pdf - Published Version Download (389kB) | Preview |
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.
| Type: | Article |
|---|---|
| Title: | Entanglement Witness for the Weak Equivalence Principle |
| Location: | Switzerland |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/e25030448 |
| Publisher version: | https://doi.org/10.3390/e25030448 |
| Language: | English |
| Additional information: | © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | entanglement, equivalence principle, quantum gravity |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10168334 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
