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arXiv · 2509.22475

Probing high-frequency gravitational waves with entangled vibrational qubits in linear Paul traps

Ryoto Takai
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Abstract

This work investigates the use of linear Paul traps as quantum sensors for detecting megahertz gravitational waves. Single-ion configurations exploit graviton-photon conversion in the presence of external magnetic fields, while two-ion systems use relative-motion excitations, which do not require magnets, to distinguish gravitational waves from axion dark matter. Furthermore, we show that entanglement of $N$ vibrational qubits enhances the signal probability by a factor of $N^2$, improving sensitivity beyond the standard quantum limit.

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Ryoto Takai. 2025-09-26. Probing high-frequency gravitational waves with entangled vibrational qubits in linear Paul traps. https://doi.org/10.1103/vm7k-snv7

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