Researchers Map How Dipoles Tune Polaron Binding Energy

Solving for impurity spectra using a functional determinant approach yields an exact method improving on previous approximations used in studying dipolar polarons. Long-range interactions between particles result in ground states simultaneously occupied by both even and odd bound states; these are tunable via dipole length but cannot be captured with simplified calculations focusing on single particle-hole excitations. Furthermore, such interactions weaken Anderson’s orthogonality catastrophe, reducing how quickly quasiparticle properties decay. Interactions between particles, specifically “dipolar” ones, affect their behaviour within…