Discrete scaling in non-integer dimensions

Abstract

We explore the effect of a finite two-body energy in the discrete scale symmetry regime of two heavy bosonic impurities immersed in a light bosonic system. By means of the Born-Oppenheimer approximation in non-integer dimensions $(D)$, we discuss the effective potential of the heavy-particles Schrodinger equation. We study how including the two-body energy in the effective potential changes the light-particles wave function and the ratio between successive Efimov states. We present the limit cycles associated with correlation between the energy of successive levels for the three and four-body systems. Our study is exemplified by considering a system composed of $N$-bosons, namely two Rubidium atoms interacting with $N-2$ Lithium ones ($^7$Li$_{N-2}-^{87}$Rb$_2$), which represent compounds of current experimental interest.