Regulator Artifacts in Uniform Matter for Chiral Interactions

Understand

Regulator functions applied to two- and three-nucleon forces are a necessary ingredient in many-body calculations based on chiral effective field theory interactions.

• These interactions have been developed recently with a variety of different cutoff forms, including regulating both the momentum transfer (local) and the relative momentum (nonlocal).
• While in principle any regulator that suppresses high momentum modes can be employed, in practice artifacts are inevitable in current power counting schemes.
• Artifacts from particular regulators may cause significant distortions of the physics or may affect many-body convergence rates, so understanding their nature is important.