Exponentially enhanced sensing in a non-Hermitian topological nanomechanical network

Jesse Slim; Clara Wanjura; Javier del Pino; Matteo Brunelli; Andreas Nunnenkamp; Ewold Verhagen

doi:10.1117/12.3000744

13 March 2024 Exponentially enhanced sensing in a non-Hermitian topological nanomechanical network

Jesse Slim, Clara Wanjura, Javier del Pino, Matteo Brunelli, Andreas Nunnenkamp, Ewold Verhagen

Proceedings Volume PC12912, Quantum Sensing, Imaging, and Precision Metrology II; PC129120O (2024) https://doi.org/10.1117/12.3000744
Event: SPIE Quantum West, 2024, San Francisco, California, United States

Abstract

Recent years have seen a strong interest in the possibility to enhance classical and quantum sensing in suitably engineered non-Hermitian multimode systems, displaying e.g. parity-time symmetry or topological phases. The bosonic Kitaev-Majorana chain is a proposed non-Hermitian topological model that is predicted to feature enhanced responsivity to small perturbations, linked to unidirectional amplification. We report an experimental realization of the bosonic Kitaev chain in a nano-optomechanical network, in which two-mode squeezing and beamsplitter interactions between nanomechanical modes are generated through temporally modulated radiation pressure control fields. We demonstrate that this system displays a dramatic sensitivity to boundary conditions, and a unique exponential scaling of the responsivity to a small perturbation with the number of resonators.

Conference Presentation

Citation Download Citation

Jesse Slim, Clara Wanjura, Javier del Pino, Matteo Brunelli, Andreas Nunnenkamp, and Ewold Verhagen "Exponentially enhanced sensing in a non-Hermitian topological nanomechanical network", Proc. SPIE PC12912, Quantum Sensing, Imaging, and Precision Metrology II, PC129120O (13 March 2024); https://doi.org/10.1117/12.3000744

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