It is a great explanation of the superconducting qubits and the multi-qubit architecture. I was wondering what are the current trends are with artifical atoms that are being developed for the Quantum Computers.
@ 21:04 I would actually go the other way, and call Q^2/2C as the potential energy, since it is the electromagnetic potential energy stored in the system, and 1/2 C omega^2 Phi^2 as the kinetic energy, since Phi is associated with the momentum of the electrons. You can redefine the mass.
To have the qubits uncoupled for a long time and to design self-error correcting algorithm is the most immediate problem for making quantum computers (in room temperature).
Hi, very interesting lecture. I would like to ask what appened to the quadratic part of the hamiltonian at , more or less, 15:54. I mean, if the hamiltonian depends by the squared flux divided by the Josephson inductance it should yield flux squared times the cosine of the flux instead of the cosine only. Shouldn't it?
The Inductance of the Josephson Junction derived there is only used to give an idea of what an effective Inductance would look like in a non-linear device like the JJ. The instantaneous JJ energy will not be given by phi^2/2 L_J because that expression assumes a linear relationship between current and flux. The cosine form of the JJ energy is the exact answer when the instantaneous power P=IV is integrated over time.
Great tutorial. Are there any good introductory textbooks/references on this material? I have decent background in electrical engineering, and basic understanding in quantum mechanics.
best explanation of superconducting qubits I have seen or read :)
Outstanding tutorial. Halfway through my PhD and i just discovered your work!
A very lucid and intuitive explanation of Superconducting qubit. Incredibly useful. Thank you!
Excellent lecture!
Excellent. The fundamentals are made clear. Thanks!
It is a great explanation of the superconducting qubits and the multi-qubit architecture. I was wondering what are the current trends are with artifical atoms that are being developed for the Quantum Computers.
@ 21:04 I would actually go the other way, and call Q^2/2C as the potential energy, since it is the electromagnetic potential energy stored in the system, and 1/2 C omega^2 Phi^2 as the kinetic energy, since Phi is associated with the momentum of the electrons. You can redefine the mass.
really well explained ...
Really great!
Best ever
To have the qubits uncoupled for a long time and to design self-error correcting algorithm is the most immediate problem for making quantum computers (in room temperature).
Hi, very interesting lecture.
I would like to ask what appened to the quadratic part of the hamiltonian at , more or less, 15:54. I mean, if the hamiltonian depends by the squared flux divided by the Josephson inductance it should yield flux squared times the cosine of the flux instead of the cosine only. Shouldn't it?
I have exactly the same doubt
.
The Inductance of the Josephson Junction derived there is only used to give an idea of what an effective Inductance would look like in a non-linear device like the JJ. The instantaneous JJ energy will not be given by phi^2/2 L_J because that expression assumes a linear relationship between current and flux. The cosine form of the JJ energy is the exact answer when the instantaneous power P=IV is integrated over time.
brilliant!
Great tutorial. Are there any good introductory textbooks/references on this material? I have decent background in electrical engineering, and basic understanding in quantum mechanics.
Try Micheal A. Nielsen Quantum Computation and Quantum Information
I'm no where near PhD, just a random business college guy watching this.
But I understand most of it. Can I consider myself as smart?
There is no Close Caption option in this video. Can any please add close caption feature.
wow
Lol. 😆 0.1 ms is better than 100 us.