Figure 1
From: Rydberg interaction induced enhanced excitation in thermal atomic vapor
The relevant energy level diagrams. (a) A probe laser driving the |g〉→|e〉 transition of a single atom leads to the dressed states |g1〉 and |g2〉. The coupling laser drives the dressed states to the Rydberg state |r〉 with detuning \({{\rm{\Delta }}}_{1}\simeq {{\rm{\Delta }}}_{C}-{{\rm{\Omega }}}_{P}^{2}\mathrm{/4}{{\rm{\Delta }}}_{P}\) and \({{\rm{\Delta }}}_{2}\simeq {{\rm{\Delta }}}_{P}+{{\rm{\Delta }}}_{C}+{{\rm{\Omega }}}_{P}^{2}\mathrm{/4}{{\rm{\Delta }}}_{P}\) respectively. (b) The twoatom model with states |g1g2〉 representing an atom in each dressed states, |g1r〉, |rg2〉 representing one atom in the respective dressed state and other atom in the Rydberg state and |rr〉 representing both the atoms in the Rydberg state.
