title: Qudit-teleportation for photons with linear optics.
abstract: Quantum Teleportation, the transfer of the state of one quantum system to another without direct interaction between both systems, is an important way to transmit information encoded in quantum states and to generate quantum correlations (entanglement) between remote quantum systems. So far, for photons, only superpositions of two distinguishable states (one "qubit") could be teleported. Here we show how to teleport a "qudit", i.e. a superposition of an arbitrary number d of distinguishable states present in the orbital angular momentum of a single photon using d beam splitters and d additional entangled photons. The same entanglement resource might also be employed to collectively teleport the state of d/2 photons at the cost of one additional entangled photon per qubit. This is superior to existing schemes for photonic qubits, which require an additional pair of entangled photons per qubit.
authors.affiliation: 1] School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa [2] The Institute of Mathematical Sciences, CIT Campus Taramani, Chennai 600 113, India.
authors.forename: Sandeep K
authors.initials: SK
authors.lastname: Goyal
authors.affiliation: School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa.
authors.forename: Patricia E
authors.initials: PE
authors.lastname: Boukama-Dzoussi
authors.affiliation: The Institute of Mathematical Sciences, CIT Campus Taramani, Chennai 600 113, India.
authors.forename: Sibasish
authors.initials: S
authors.lastname: Ghosh
authors.affiliation: CSIR National Laser Centre, PO Box 395, Pretoria 0001, South Africa.
authors.forename: Filippus S
authors.initials: FS
authors.lastname: Roux
authors.affiliation: 1] School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa [2] National Institute of Theoretical Physics (NITheP), University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa.
authors.forename: Thomas
authors.initials: T
authors.lastname: Konrad