Entanglement Witness for the Weak Equivalence Principle

• URL: http://arxiv.org/abs/2203.11628v1
• Date: Tue, 22 Mar 2022 11:29:56 GMT
• Title: Entanglement Witness for the Weak Equivalence Principle
• Authors: Sougato Bose, Anupam Mazumdar, Martine Schut, Marko Toro\v{s}
• Abstract summary: We will provide a simple protocol based on creating Schr"odinger Cat states in a laboratory to test the fully quantum regime of the equivalence principle. We will argue that such a quantum protocol is unique with regard to testing especially the weak equivalence principle via witnessing quantum entanglement.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The Einstein equivalence principle is based on the equality of gravitational mass 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 will provide a simple protocol based on creating Schr\"odinger Cat states in a laboratory to test the fully quantum regime of the equivalence principle where both matter and gravity are treated at par as a quantum entity. We will argue that such a quantum protocol is unique with regard to testing especially the weak equivalence principle via witnessing quantum entanglement.

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