Year: 2024
Type: article
Abstract: Photonic quantum metrology harnesses quantum states of light, such as NOON or twin-Fock states, to measure unknown parameters beyond classical precision limits. Current protocols suffer from two severe limitations that preclude their scalability: the exponential decrease in fidelities (or probabilities) when generating states with large photon numbers due to gate errors and the increased sensitivity of such states to noise. Here, we develop a deterministic protocol combining quantum optical nonlinearities and variational quantum algorithms that provides a substantial improvement on both fronts. First, we show how the variational protocol can generate metrologically relevant states with a small number of operations which do not significantly depend on photon number, resulting in exponential improvements in fidelities when gate errors are considered. Second, we show that such states offer a better robustness to noise compared to other states in the literature. Since our protocol harnesses interactions already appearing in state-of-the-art setups, such as cavity QED, we expect that it will lead to more scalable photonic quantum metrology in the near future. Published by the American Physical Society 2024
Source: Physical Review Research
Authors: A. Muñoz de las Heras, C. Tabares, J. T. Schneider, L. Tagliacozzo, D. Porras, A. González-Tudela
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Awards: G1096179202, G1118215018, G1175115578, G129255482, G210041235, G2262748287, G2390397592, G240573653, G2601397997, G300979063, G34346518, G3480869486, COMFUTURO, a public-private collaboration committed to science and the future, G3681454997, G3767523895, G4042783231, G4141925851, G425668148, G434337789, G4511186732, G480488906, G488842982, G5080475149, G5195188938, G524312865, G586857820, G6315717048, G7084143925, G7550798192, G8138842782
OpenAlex ID: W4392951934