Join by zoom: https://lbnl.zoom.us/j/92569792923
Abstract: Detection of a rapidly delivered impulse is a ubiquitous problem in many branches of physics. Fundamental quantum measurement noise in such a detection is often the ultimate limitation to reaching better sensitivities. Here we discuss these limits in the context of impulse measurement with optomechanical sensors. These techniques have wide applications, including direct detection of some dark matter candidates. We will give some details on current developments with levitated dielectric sensors in the Moore group at Yale, and membrane chip-based systems being fabricated at Purdue as part of our Windchime DM detection collaboration. We will also discuss some ideas about getting readout limits below the so-called Standard Quantum Limit.