Title: Speedup of Wave-Like Dark Matter Searches Using Entangled Qubits

Abstract: Quantum sensing provides novel techniques that can accelerate searches for dark matter (DM). Recent proposals use entangled GHZ states for wave-like DM sensing, where quadratic scaling of the signal can be achieved through coherent addition of amplitudes from each qubit. In this talk, I will show that unlike analogous schemes in conventional cavity setups, this scaling advantage persists even at the level of scan-rate in the entangled-qubit scheme, demonstrating genuine speedup over cavity experiments. I will also show that this favorable scaling can allow GHZ states of ~ 100 qubits to outperform dark photon cavity searches for DM masses ≳ 20-40 𝜇eV depending on the cavity readout scheme.

https://lbnl.zoom.us/j/94928022788?pwd=emVQWG1mTnhSbHVqekVuenk0VEVQZz09