General Relativistic Decoherence with Applications to Dark Matter Detection

• URL: http://arxiv.org/abs/2103.15892v2
• Date: Mon, 19 Jul 2021 18:21:29 GMT
• Title: General Relativistic Decoherence with Applications to Dark Matter Detection
• Authors: Itamar J. Allali, Mark P. Hertzberg
• Abstract summary: We compute the decoherence rate of a quantum object within general relativity. For axion DM in a superposition of the field's phase, we find that DM in the Milky Way is robust against decoherence.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum mechanics allows for states in macroscopic superpositions, but they ordinarily undergo rapid decoherence due to interactions with their environment. A system that only interacts gravitationally, such as an arrangement of dark matter (DM), may exhibit slow decoherence. In this Letter, we compute the decoherence rate of a quantum object within general relativity, focusing on superposed metric oscillations; a rare quantum general relativistic result. For axion DM in a superposition of the field's phase, we find that DM in the Milky Way is robust against decoherence, while a spatial superposition is not. This novel phase behavior may impact direct detection experiments.

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