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2015 ; 6
(ä): 7185
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Superdense teleportation using hyperentangled photons
#MMPMID26018201
Graham TM
; Bernstein HJ
; Wei TC
; Junge M
; Kwiat PG
Nat Commun
2015[May]; 6
(ä): 7185
PMID26018201
show ga
Transmitting quantum information between two remote parties is a requirement for
many quantum applications; however, direct transmission of states is often
impossible because of noise and loss in the communication channel.
Entanglement-enhanced state communication can be used to avoid this issue, but
current techniques require extensive experimental resources to transmit large
quantum states deterministically. To reduce these resource requirements, we use
photon pairs hyperentangled in polarization and orbital angular momentum to
implement superdense teleportation, which can communicate a specific class of
single-photon ququarts. We achieve an average fidelity of 87.0(1)%, almost twice
the classical limit of 44% with reduced experimental resources than traditional
techniques. We conclude by discussing the information content of this constrained
set of states and demonstrate that this set has an exponentially larger state
space volume than the lower-dimensional general states with the same number of
state parameters.