#310 overall
Quantum Computing
Coursera
2 recommenders · 2 threads · recommended in 2 years, 2012–2021 · score 1.5
A Coursera course introducing quantum computing, covering the basic principles of qubits, entanglement, and quantum circuits and algorithms. Commenters mention it covers topics such as quantum teleportation.
Commenters describe the classes as "really good" and say the course is worth taking for quantum computation over vendor-specific certifications.
Recommendations by year
20062026
I don't know if it's worth it or not. I guess it depends on who finds these certificates valuable. If you have the time and inclination then I think it would be better to get coursera and udacity degrees/certificates than anything vendor specific.
I took a few networking and quantum computation classes on coursera and they were really good.
(Note: my full qualifications are an on-going Coursera course on quantum computing that covers quantum teleportation lightly. FWIW, I recommend the course.)
In vague terms, the process of quantum teleportation is the following:
* You have a qubit that you want to transmit to a friend and that you don't know anything about.
* create an entangled pair of qubits (such as photons) and separate them. Keep one yourself and give another to your friend.
* Now you have two qubits; one entangled with your friends and one that you want to transmit.
* Send your two bits through a quantum circuit (the main part being a 'controlled NOT gate').
* Your bit is now entangled with the bit that is entangled with your friends bit.
* Measure each of your bits, hence 'collapsing' them. Each measurement gives you a classical bit.
* Transmit your two classical bits to your friend over any classical connection.
* Your friend then performs an operation on his or her qubit depending on what you send him or her.
* Your friend's qubit is now in the state that your original qubit was in. Your original qubit is now in a different state.
Call it teleporation if you want; it's not that unlike some sci-fi teleportation constructs of 'beaming' things places.
Why bother with this?
* It lets you send qubits to distant places that you have only classical channels to (and previously close enough contact share two entangled qubits).
* It allows more error-resistant computations: if your qubit is difficult to construct and you wish to perform a difficult operation on it, you can actually have your friend perform the difficult operation on his or her bit - prior to teleportation - and, if it succeeds, you can then proceed with the teleportation. If it doesn't succeed, your friend may try again on another entangled qubit without messing up your difficult-to-prepare qubit. After a success and teleportation, you get the same result (up to a commutator which is usually relatively small and risk-free) as performing the difficult operation on the difficult-to-prepare qubit, but with less risk of messing it up.