A measurement-based protocol for the generation of delocalised quantum states of a mechanical system

• URL: http://arxiv.org/abs/2601.09431v1
• Date: Wed, 14 Jan 2026 12:27:28 GMT
• Title: A measurement-based protocol for the generation of delocalised quantum states of a mechanical system
• Authors: Matteo Bordin,
• Abstract summary: Non-Gaussian mechanical states are a key resource for quantum-enhanced sensing and tests of macroscopic quantum physics.<n>We propose a measurement-based protocol to herald delocalized, nonclassical states of a mechanical oscillator in cavity optomechanics by conditioning on Geiger photodetection of the optical output.
• Score: 0.2436681150766912
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Non-Gaussian mechanical states are a key resource for quantum-enhanced sensing and tests of macroscopic quantum physics. We propose a measurement-based protocol to herald delocalized, nonclassical states of a mechanical oscillator in cavity optomechanics by conditioning on Geiger photodetection of the optical output. We analyse under which conditions Stokes-induced optomechanical entanglement give rise to mechanical Wigner Function negativity upon detection. We develop and compare a blue-detuned pulsed scheme and a continuous-wave steady-state scheme employing temporal-mode filtering, and we quantify heralding rates and robustness to finite temperature under realistic detection efficiencies.

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