Probing high-frequency gravitational waves with entangled vibrational qubits in linear Paul traps
arXiv:2509.22475 · doi:10.1103/vm7k-snv7
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 vibrational qubits enhances the signal probability by a factor of , improving sensitivity beyond the standard quantum limit.
14 pages