RT Journal Article T1 Entanglement between total intensity and polarization for pairs of coherent states A1 Sanchidrian-Vaca, Carlos A1 Luis Aina, Alfredo AB We examine entanglement between number and polarization, or number and relative phase, in pair coherent states and two-mode squeezed vacuum via linear entropy and covariance criteria. We consider the embedding of the two-mode Hilbert space in a larger space to get a well-defined factorization of the number-phase variables. This can be regarded as a kind of protoentanglement that can be extracted and converted into real particle entanglement via feasible experimental procedures. In particular this reveals interesting entanglement properties of pairs of coherent states. PB Amer Physical Soc SN 2469-9926 YR 2018 FD 2018-04-09 LK https://hdl.handle.net/20.500.14352/12084 UL https://hdl.handle.net/20.500.14352/12084 LA eng NO ©2018 American Physical Society.A.L. acknowledges financial support from Spanish Ministerio de Economía y Competitividad Project No. FIS2016-75199-P, and from the Comunidad Autónoma de Madrid research consortium QUITEMAD+ Grant No. S2013/ICE-2801. NO Ministerio de Economía y Competitividad (MINECO) NO Comunidad de Madrid DS Docta Complutense RD 6 abr 2025