Quantum-Enhanced Impulse Detection with Two-Mode Squeezed Light

Experimental systems optimized for the detection of weak, transient signals have been suggested for the exploration of phenomena in fundamental physics: including dark matter and neutrino physics. One potential platform for the measurement of such signals is based on optomechanical systems, which can operate in a regime limited only by quantum noise. In this work, using such a device, we experimentally demonstrate enhanced sensitivity for impulse detection using two-mode squeezed light, achieving performance beyond the standard quantum limit. Specifically, we characterize the response of a micro-electro-mechanical sensor (MEMS), using both classical and two-mode squeezed light, to an impulse imparted by an optical pulse incident on the back of the MEMS. Through this approach, we show that an enhancement in impulse sensitivity is observed, limited primarily by optical loss. These results establish two-mode squeezed light as an effective platform for quantum-enhanced sensing of transient signals based on optomechanical systems, with potential applications in precision force sensing and searches for weak phenomena.