Shot-to-shot noise cancellation for parametric oscillators

• URL: http://arxiv.org/abs/2604.02175v1
• Date: Thu, 02 Apr 2026 15:38:52 GMT
• Title: Shot-to-shot noise cancellation for parametric oscillators
• Abstract summary: We propose a technique that perfectly cancels shot-to-shot force noise in squeezing experiments based on parametric modulation.<n>We demonstrate shot-to-shot noise suppression to the measurement-backaction limit.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Powerful approaches to squeeze the motional state of a harmonic oscillator rely on the stepwise modulation of its resonance frequency. Such protocols can be limited by forces that vary slowly between experimental runs but are constant during a single experimental shot. Such shot-to-shot noise gives rise to a spread in experimental outcomes that masks the uncertainty intrinsic to quantum theory. Taking inspiration from spin-echo protocols, we propose a decoupling technique that, under ideal conditions, perfectly cancels shot-to-shot force noise in squeezing experiments based on parametric modulation. We implement the protocol using an optically levitated nanoparticle, where shot-to-shot force noise arises from slowly varying stray fields acting on the charge carried by the particle. Using our oscillator-echo protocol, we demonstrate shot-to-shot noise suppression to the measurement-backaction limit.

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