Quantum Gravity Signature in a Thermodynamic Observable

• URL: http://arxiv.org/abs/2412.17460v1
• Date: Mon, 23 Dec 2024 10:28:10 GMT
• Title: Quantum Gravity Signature in a Thermodynamic Observable
• Authors: Thomas Strasser, Marios Christodoulou, Richard Howl, Caslav Brukner,
• Abstract summary: Proposed experiments for obtaining empirical evidence for a quantum description of gravity in a table-top setting focus on detecting quantum information signatures. We explore an alternative approach where the quantization of gravity could be inferred through measurements of macroscopic, thermodynamical quantities. We find a clear-cut distinction between the predictions of a classical gravitational interaction and a quantum gravitational interaction in the heat capacity of the Bose gas.
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• Abstract: Proposed experiments for obtaining empirical evidence for a quantum description of gravity in a table-top setting focus on detecting quantum information signatures, such as entanglement or non-Gaussianity production, in gravitationally interacting quantum systems. Here, we explore an alternative approach where the quantization of gravity could be inferred through measurements of macroscopic, thermodynamical quantities, without the need for addressability of individual quantum systems. To demonstrate the idea, we take as a case study a gravitationally self-interacting Bose gas, and consider its heat capacity. We find a clear-cut distinction between the predictions of a classical gravitational interaction and a quantum gravitational interaction in the heat capacity of the Bose gas.

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