RT Journal Article T1 Simple factorization of unitary transformations A1 de Guise, Hubert A1 Di Matteo, Olivia A1 Sánchez Soto, Luis Lorenzo AB We demonstrate a method for general linear optical networks that allows one to factorize any SU(n) matrix in terms of two SU(n-1) blocks coupled by an SU(2) entangling beam splitter. The process can be recursively continued in a straightforward way, ending in a tidy arrangement of SU(2) transformations. The method hinges only on a linear relationship between input and output states, and can thus be applied to a variety of scenarios, such as microwaves, acoustics, and quantum fields. PB American Physical Society SN 2469-9926 YR 2018 FD 2018-02-20 LK https://hdl.handle.net/20.500.14352/11995 UL https://hdl.handle.net/20.500.14352/11995 LA eng NO ©2018 American Physical Society.The work of H.d.G. and O.D.M. is supported by NSERCof Canada. I.Q.C. is supported in part by the Government ofCanada and the Province of Ontario. O.D.M. is also gratefulfor hospitality at the MPL. L.L.S.S. acknowledges financialsupport from the Spanish MINECO (Grant No. FIS2015-67963-P). We thank L. Rudnicki for helpful discussions. NO Ministerio de Economía y Competitividad (MINECO) DS Docta Complutense RD 9 abr 2025