Quantum key distribution without reference frame alignment: Exploiting photon orbital angular momentum

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dc.creatorSpedalieri, Federico M.
dc.date2004-09-10
dc.date.accessioned2026-07-07T06:10:49Z
dc.date.available2026-07-07T06:10:49Z
dc.descriptionWe present a new implementation of the BB84 quantum key distribution protocol that employs a $d$-dimensional Hilbert space spanned by spatial modes of the propagating beam that have a definite value of orbital angular momentum. Each photon carries $\log d$ bits of information, increasing the key generation rate of the protocol. The states used in the transmission part of the protocol are invariant under rotations about the propagation direction, making this implementation independent of the alignment between the reference frames of the sender and receiver. The protocol still works when these reference frames rotate with respect to each other.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0409057
dc.identifierhttp://arxiv.org/abs/quant-ph/0409057
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/92357
dc.subjectQuantum Physics
dc.titleQuantum key distribution without reference frame alignment: Exploiting photon orbital angular momentum
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