How to Teleport Schrödinger's Cat
Why Physics Stack Exchange recommends it
Physics Stack Exchange answerers point people to it when someone asks how quantum teleportation works and what role the classical channel plays.
Recommended by 2 people across 2 different months, 2017 to 2017.
What it is
A minutephysics explainer that walks through the full quantum teleportation protocol, in which an arbitrary qubit is sent from Alice to Bob using a shared Bell (EPR) pair and a classical communication channel. It follows an earlier video on the no-cloning theorem and uses the Schr\u00f6dinger's cat framing to keep the idea accessible.
What people said
Recommends Tausif Hossain · 2017-06 · Physics Stack Exchange · on “Teleportation and the observers effect”
This is an interesting question. But according to quantum mechanics it is possible although difficult. By careful tricks and procedures this can be done but the original being would be destroyed. And so I recommend you watch these videos which explains this( especially video 3): Quantum Teleportation [this video] Cloning [LINK] How Teleportation works [LINK]
Recommends Emilio Pisanty · 2017-07 · Physics Stack Exchange · on “How is quantum teleportation any better than regular transfer of information?”
The key aspect that sets quantum teleportation apart from the regular classical transfer of information is that it enables Alice to send information that even she does not have access to. The problem arises because quantum states are fragile, and if we only have one copy of the system, it is intrinsically impossible to pin down the state exactly. As an easy example, you can try to measure the position of a particle, but that will destroy the quantum state ('collapse the wavefunction') and you will be unable to measure its momentum unless you have other copies of the system. (The same holds for any two complementary variables, like spin along two different axes.) Now, suppose that Alice has o
Cites Alejandro Menaya · 2017-04 · Physics Stack Exchange · on “quantum teleportation”
As stated in previous answers, and in the comments, quantum teleportation protocol let us to send the state of entangled qubits with the help of sub-luminal communication. In this video [this video] the essential concept is explained in a very friendly way. However the important part of the sub-luminal communication is not evplained in detail. Schemattically we can perform the teleportation protocol as follows: Taking the state $\phi_1$ we want to teleport and a couple of entangled systems $\psi_2$ and $\psi_3$, for short $\psi_{23}$. Entangle the firs state with one of the system in $\psi_{12}$, obtaining a "very" entangled system $\psi_{123}$ Perform a series of transformations, which will lead