Figure 3
From: Rydberg interaction induced enhanced excitation in thermal atomic vapor
(a) Energy level diagram to model Rydberg anti-blockade. Δ1 and Δ2 (=Δ1 + Δ′) are the coupling laser detuning of atom 1 and 2 respectively. (b) Schematic of the interaction sphere of radius r b . The atom in the dressed state |g2〉 is placed at the centre of the sphere. The atoms in the spherical shell of radius r and thickness dr can compensate for the two-photon resonance to the |rr〉 state due to van der Waals type Rydberg-Rydberg interaction (V rr = C6/r6) with the atom at the center. (c) Dispersion spectrum of the probe laser calculated using non-interacting model (solid line) and two-atoms interacting model (black open circle). (d) Calculated dispersion peak height of the anti-blockade peak using two-atoms interacting model (black open circle) showing the quadratic dependance (solid line) of density.
