Broadband teleportation

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  • 8 February 1999
Abstract
Quantum teleporation of an unknown broadband electromagnetic field is investigated. A previous theoretical protocol for teleporting the quantum state of a single mode of the electromagnetic field is generalized for the case of a multimode field with finite bandwith. For that purpose, as in the previous protocol, the teleportation of continuous quantum variables instead of discrete quantum variables is considered. The analysis presented here shows that the quantum state of a finite bandwidth electromagnetic field can be teleported by means of a nondegenerate optical parametric amplifier. Published experimental parameters suggest significant improvement is possible for the transportation of an unknown quantum state compared with classical schemes. In fact, we show that the noise added by our broadband scheme is just twice the (entanglement) source's squeezing spectrum for its `quiet quadrature'.

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