RT Journal Article T1 Equivalence between macroscopic quantum superpositions and maximally entangled states: application to phase-shift detection A1 Luis Aina, Alfredo AB We demonstrate that the superpositions of macroscopically distinct coherent states are maximally entangled states. Among other possible applications of this result, in this paper we show that the experimental arrangements generating superpositions of macroscopically distinct coherent states may be adapted for precision phase-shift detection reaching the maximum sensitivity allowed by quantum physics (Heisenberg limit). PB American Physical Society SN 1050-2947 YR 2001 FD 2001-11 LK https://hdl.handle.net/20.500.14352/59678 UL https://hdl.handle.net/20.500.14352/59678 LA eng NO ©2001 The American Physical Society DS Docta Complutense RD 16 jul 2025