We study the creation of polarisation entanglement by means of optical entanglement swapping (Zukowski et al., [Phys. Rev. Lett. 71, 4287 (1993)]). We show that this protocol does not allow the creation of maximal `event-ready' entanglement. Furthermore, we calculate the outgoing state of the swapping protocol and stress the fundamental physical difference between states in a Hilbert space and in a Fock space. Methods suggested to enhance the entanglement in the outgoing state as given by Braunstein and Kimble [Nature 394, 840 (1998)] generally fail.
|Publication status||Published - 2000|
|Event||Workshop on Relativistic Quantum Measurement and Decoherence - Naples, Italy|
Duration: 9 Apr 1999 → 10 Apr 1999
|Conference||Workshop on Relativistic Quantum Measurement and Decoherence|
|Period||9/04/99 → 10/04/99|