[fgoesbrrr]

> Further, we use this mapping to prove that any problem efficiently solvable by a quantum algorithm can be recast as a problem involving a network of coupled oscillators, albeit exponentially many of them.

Is this a new result, giving that quantum field theory is described in terms of quantum harmonic oscillators?

[eigenket]

Its a network of exponentially many coupled classical oscillators, not quantum harmonic oscillators. This is a new result.