Fig. 2: Creating system excitations.
From: Quantum Rabi dynamics of trapped atoms far in the deep strong coupling regime
a Variation of the number of excitation quanta \(\left\langle N\right\rangle\) in the potential versus interaction time for a coupling \(\frac{g}{2\pi }=2275\left(23\right){{{{{\rm{Hz}}}}}}\) and a bosonic mode frequency \(\frac{\omega }{2\pi }=346(7){{{{{\rm{Hz}}}}}}\), corresponding to a relative coupling strength \(\frac{g}{\omega }=6.58(7)\), i.e., far in the deep strong coupling regime. The used qubit spacings were \(\frac{{\omega }_{q}}{2\pi }=586(6){{{{{\rm{Hz}}}}}}\) (blue dots) and 5200(50) Hz (orange triangles). The lines are theory. Atoms for this measurement are prepared in the momentum state |−2\({{\hslash }}\)k〉 in the center of the harmonic trapping potential. b Variation of the number of excitations on the relative coupling strength \(\frac{g}{\omega }\). Here a fixed interaction time of \(\frac{3}{8}\frac{\pi }{\omega }\) was used, and blue dots and orange triangles correspond to qubit spacings \(\frac{{\omega }_{q}}{2\pi }=590\left(6\right){{{{{\rm{Hz}}}}}}\) and 5850(60) Hz, respectively. The visible error bars denote the statistical uncertainties.
