Squashing Models for Optical Measurements in Quantum Communication

Simple item page
dc.creatorBeaudry, Normand J.
dc.creatorMoroder, Tobias
dc.creatorLütkenhaus, Norbert
dc.date2008-04-18
dc.date2008-09-17
dc.date.accessioned2026-07-07T10:03:08Z
dc.date.available2026-07-07T10:03:08Z
dc.descriptionMeasurements with photodetectors necessarily need to be described in the infinite dimensional Fock space of one or several modes. For some measurements a model has been postulated which describes the full mode measurement as a composition of a mapping (squashing) of the signal into a small dimensional Hilbert space followed by a specified target measurement. We present a formalism to investigate whether a given measurement pair of mode and target measurements can be connected by a squashing model. We show that the measurements used in the BB84 protocol do allow a squashing description, although the six-state protocol does not. As a result, security proofs for the BB84 protocol can be based on the assumption that the eavesdropper forwards at most one photon, while the same does not hold for the six-state protocol.
dc.description4 pages, 2 figures. Fixed a typographical error. Replaced the six-state protocol counter-example. Conclusions of the paper are unchanged
dc.identifierhttps://arxiv.org/abs/0804.3082
dc.identifierhttp://arxiv.org/abs/0804.3082
dc.identifierPhys. Rev. Lett. 101, 093601 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.093601
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/169176
dc.subjectQuantum Physics
dc.titleSquashing Models for Optical Measurements in Quantum Communication
dc.typetext

Files

Collections

arXiv