Decoherence Time vs Annealing Time
On the recent "Take the Leap" Webinar you addressed the question of how decoherence time relates to the annealing run-time.
It caught my attention that the decoherence time of a single flux qubit is reported to be on the order of nanoseconds, while your annealing runs are on the order or microseconds (5-20us), in comparison [not sure if it's a direct or fair comparison] IBM's commercial 20-qubit device claims to have a coherence time of about 100 microseconds*, and rigetti's device is also in the range of microseconds**.
As a somewhat experienced user of your machine, thanks to Leap, I can attest that Quantum Annealing works in sampling from low energy configurations of the Ising models given to it. Which makes me think that the ~3 orders of magnitude difference between decoherence time and annealing time is detrimental but still allows the device to operate.
So, I have a few questions that maybe can be addressed separately, or maybe just point to the best resources to read about them:
1) Is this decoherence time a fundamental/physical limitation of the technology (i.e flux qubits) used by D-Wave? will it improve? will it scale nicely?
2) Is the new generation of devices going to have an improvement on this parameter, and if so, do you expect it to be a significant improvement?
3) Can you explain or point to an explanation on the choice of annealing schedule? According to AQC the system should evolve slowly, but... decoherence time...