2026-10-11T11:02:39Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33935710 2026-10-01T17:37:11Z category_26512 item_type_3 month_year_10_2026

Raw datasets and scripts to produce article's figures 2-4. Paul-Edouard Blanchard (24946465) Photonic and electro-optical devices, sensors and systems (excl. communications) Non-reciprocal Bosonic Kitaev Chain Optical sensing <p dir="ltr">Nonreciprocity is a key resource for pushing the performance of photonic devices beyond the fundamental limits imposed by Lorentz reciprocity. Theoretical proposals for enhancing optical sensing, including the bosonic analogue of the Kitaev model, predict that nonreciprocal dynamics can yield an enhanced signal-to noise ratio. However, experimental demonstrations have so far been limited to small lattices. Here we show an optical sensor in which nonreciprocal light propagation enables the detection of weak perturbations with a signal-to-noise ratio, linked to the quantum Fisher information extracted per input photon, that scales exponentially with system size. Our approach encodes two coupled Hatano–Nelson chains that realize an effective bosonic Kitaev model within the resonant modes of an electro-optic frequency comb. Nonreciprocal propagation in frequency space is achieved via simultaneous phase and amplitude modulation of the intracavity field. We demonstrate the sensing of a weak modulation tone coupling the two chains, and observe an exponential enhancement of the signal-to-noise ratio over three orders of magnitude as the system is scaled to over 70 frequency modes per chain. These results establish a regime of non-Hermitian sensing, and highlight how nonreciprocal dynamics can be harnessed to achieve exponentially enhanced measurement precision in photonic systems.</p><p><br></p><p dir="ltr">Raw data sampled at 6.25Gs/s. The .npy files contain: the synchronization signal (marking the laser stepped frequency sweep), the heterodyne signal and the transmission signal. The laser frequency sweeps across several cavity frequency modes located at the beginning of a chain.</p> 2026-10-01T17:37:11Z Dataset Dataset 10.6084/m9.figshare.33935710.v5 https://figshare.com/articles/dataset/Raw_datasets_and_scripts_to_produce_article_s_figures_2-4_/33935710 CC BY 4.0