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Fundamentals

01 /Quantum computers with magical advantage? 02 /Bra-ket notation 03 /Born rule 04 /Bloch sphere 05 /Measurement operators 06 /Experimental and theoretical measurements 07 /How to measure in any basis 08 /State decomposition 09 /Why every maximally entangled state is secretly a Bell state 10 /Coherence 11 /Relaxation 12 /Quantum materials: the environment of a qubit 13 /Introduction to quantum error correction (QEC) 14 /Multiqubit systems 15 /Multiqubit gates 16 /Entanglement 17 /Measuring multiqubit systems 18 /Superdense coding 19 /Teleportation 20 /Entanglement swapping

Teleportation

Teleportation has been the focus of many sci-fi movies and books. In this lecture you will find out that quantum teleportation is not what you would expect... Gustavo Amaral (QuTech) will explain how we can make use of the entanglement and two classical bits to teleport information from one qubit to another already existing one. Since there is nothing being transmitted through a quantum channel we cannot call this protocol a quantum transmission instead, we call it quantum teleportation.

Prerequisite knowledge

Further thinking

In quantum teleportation, is it necessary for two parties to share a Bell state before the start of the protocol?

As soon as Bob receives Alice’s bits, Bob can measure his qubit and teleport her state.  Does this allow for faster-than-light communication?

Solutions

Further reading

For a more detailed explanation on the Bell States see section 1.3.6 in M. A. Nielsen and I. L. Chuang, Quantum computation and quantum information, 10th anniversary ed. Cambridge ; New York: Cambridge University Press, 2010.

For a more detailed explanation on the Quantum Teleportation protocol see section 1.3.7 in M. A. Nielsen and I. L. Chuang, Quantum computation and quantum information, 10th anniversary ed. Cambridge ; New York: Cambridge University Press, 2010.