For initiating discrete breathers, I wonder if short pulses of high density current through a lattice would create similar effects as Dr. Dubinko's suggestion for electron beams.
There's a lot that this theory doesn't explain but it seems like a path that should be explored. It would be great to see theoretical work done on the possible nuclear reactions that discrete breathers could catalyze.
From the paper:
"One of the perspective ways of triggering LENR is to use electron beams with variable beam energy [41]. The point is that electrons hitting the target atoms displace them from equilibrium positions by the distance depending on the electron energy and the atomic mass. The displaced atoms start vibrating with frequencies inversely proportional to the initial dis-placements. If the frequency (i.e. initial displacement) matches the LAV frequency, a LAV is generated. Therefore, electron irradiation with variable energy provides a method of displacing atoms from their equilibrium positions at any desired dis-tance, which in its turn allows one to fit the beam energy to generate LAVs and hence to trigger LENR."