Quantum Teleportation

Quantum states can propagate faster than light by applying the following steps:

1. Prepare an EPR pair of Qubits $A$ and $B$, where $A$ is sent to Alice and $B$ to Bob.
2. Given a Qubit $C$ with original Quantum state $|\psi ⟩$ owned by Alice, entangle $A$ and $C$ by using a CNOT and Hadamard gates.
3. Alice measures $A$ and $C$.
4. The original state of $|\psi ⟩$ has now been propagated to $B$, with the information needed to obtain the state $|\psi ⟩$ dependent on the results of the measurements of $A$ and $C$. The transmission of the classical bits resulting from the measurements ensures that the speed of light has not been violated.

Image taken from ScienceDirect

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