First experimental deployment of four-component cat states in a high-Q superconducting cavity yields 8.1-fold signal enhancement and constrains dark photon kinetic mixing to 蔚 < 7.32 脳 10^{-16} near 6.44 GHz with 10^{-16} sensitivity over 100 kHz bandwidth.
Holdom, Two饾憟(1)鈥檚 and饾湒Charge Shifts.Phys
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Quantum-Enhanced Dark Matter Search Using Cat States
First experimental deployment of four-component cat states in a high-Q superconducting cavity yields 8.1-fold signal enhancement and constrains dark photon kinetic mixing to 蔚 < 7.32 脳 10^{-16} near 6.44 GHz with 10^{-16} sensitivity over 100 kHz bandwidth.