Efficient emulator for solving three-nucleon continuum Faddeev equations with chiral three-nucleon force comprising any number of contact terms

Understand

We demonstrate a computational scheme which drastically decreases the required time to get theoretical predictions based on chiral two- and three-nucleon forces for observables in three-nucleon continuum.

• For a three-nucleon force containing N short-range terms all workload is reduced to solving N+1 Faddeev-type integral equations.
• That done, computation of observables for any combination of strengths of the contact terms is done in a flash.
• We demonstrate on example of the elastic nucleon-deuteron scattering observables the high precision of the proposed emulator and its capability to reproduce exact results.