A new approach to template banks of gravitational waves with higher harmonics: reducing matched-filtering cost by over an order of magnitude. - Digvijay Wadekar; Tejaswi Venumadhav; Ajit Kumar Mehta; Javier Roulet; Seth Olsen; Jonathan Mushkin; Barak Zackay; Matias Zaldarriaga (CoRR, 2023)