Properties of collective Rabi oscillations with two Rydberg atoms<xref rid="cpb_28_1_013202_fn1" ref-type="fn">*</xref><fn id="cpb_28_1_013202_fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11474094, 11104076, and 11574086), the Science and Technology Commission of Shanghai Municipality, China (Grant Nos. 18ZR1412800 and 16QA1401600), and the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20110076120004).</p></fn>

Properties of collective Rabi oscillations with two Rydberg atoms**

Project supported by the National Natural Science Foundation of China (Grant Nos. 11474094, 11104076, and 11574086), the Science and Technology Commission of Shanghai Municipality, China (Grant Nos. 18ZR1412800 and 16QA1401600), and the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20110076120004).

Ma Dan-Dan, Zhang Ke-Ye, Qian Jing^†

Representation for the frequency numbers in Rabi oscillations between the ground state and (a) the singly-excited Rydberg state, (b) the doubly-excited Rydberg state, versus Ω_eff and U_dd. Labelings 1, 2, > 2 denote the number of oscillating frequencies, and F, P, and N denote the full, partial, and no blockade regimes. (c1)–(c4) The full frequency spectrum of f_r(ω_2,r) (blue-solid) and F_rr(ω_{2, rr}) (red-dashed) in the frequency domain for U_dd/Ω_eff = 0.1 (no blockade), 0.5 (partial blockade), 1.3 (partial blockade), and 10 (full blockade), where the amplitudes Fr(rr)(s)pk for the peak and sub-peak frequencies are given, and Ω_eff = 1.0 MHz. (d) and (e) The peak frequencies ω2,rpk and ω2,rrpk corresponding to (a) and (b). The parameter χ = 1 is used in all plots and Ω₁ = 20.0 MHz.