Harvesting quantum coherence from axion dark matter

Abstract

Quantum coherence is one of the most striking features of quantum mechanics rooted in the superposition principle. Recently it has been demonstrated that it is possible to harvest the quantum coherence from a coherent scalar field. In order to explore a new method of detecting axion dark matter, we consider a point-like Unruh-DeWitt detector coupled to the axion field and quantify a coherent measure of the detector. We show that the detector can harvest the quantum coherence from the axion dark matter. To be more precise, we consider a two-level of electron system in an atom as the detector. In this case, we obtain the coherence measure $C=2.2\times 10^{-6}\gamma \left(T/1\mathrm{s}\right)$ where $T$ and $\gamma$ are an observation time and the Lorentz factor. At the same time, the axion mass $m_a$ we can probe is determined by the energy gap of the detector.

16pages

References in corpus (8)

• How often does the Unruh-DeWitt detector click? Regularisation by a spatial profile
• Fundamental physics with the Hubble Frontier Fields: constraining Dark Matter models with the abundance of extremely faint and distant galaxies
• Indirect detection of gravitons through quantum entanglement
• Axion search with quantum nondemolition detection of magnons
• General Relativistic Decoherence with Applications to Dark Matter Detection
• Field assisted extraction and swelling of quantum coherence for moving Unruh-DeWitt detectors
• Assisted harvesting and catalysis of coherence from scalar fields
• Field-induced entanglement in spatially superposed objects

Cited by in corpus (4)

• Axion-Like Dark Matter Detection Using Stern-Gerlach Interferometer
• Squeezed quantum states of graviton and axion in the universe
• Cohering and decohering power of massive scalar fields under instantaneous interactions
• Quantized mass-energy effects in an Unruh-DeWitt detector