Continuous variable measurement device independent quantum conferencing with postselection

Continuous variable measurement device independent quantum conferencing with postselection

Blog Article

Abstract A continuous variable (CV), measurement device independent (MDI) quantum key distribution (QKD) protocol is analyzed, enabling three parties to connect for quantum conferencing.We utilise a generalised Bell detection at an untrusted relay and a postselection procedure, in which distant parties reconcile on the signs of the displacements of the quadratures of their prepared coherent states.We huge-dildos derive the rate of the protocol under a collective pure-loss attack, demonstrating improved rate-distance performance compared to the equivalent non-post-selected protocol.In the symmetric configuration in which all the parties lie the same distance from the relay, we find a positive key rate over 6 km.Such postselection techniques can be used to improve the rate of multi-party quantum conferencing protocols at longer distances Course a pied - Homme - Vetements - Chandail at the cost of reduced performance at shorter distances.