Rydberg dressing evolution via Rabi frequency control in thermal atomic vapors

Abstract

We report for the first time the theoretical and experimental research on Rydberg electromagnetically induced transparency and second-order fluorescence dressing evolution by Rabi frequency control in thermal atomic vapors, in which the controlled results are well explained by the dressing effect and the Rydberg excitation blockade. Based on the certification of the Rydberg excitation blockade fraction through the dependence on principle quantum number n, we obtain dressing evolution curves, consisting of single-dressing and double-dressing in local and nonlocal blockade samples by scanning the probe and dressing fields. In addition, the competition between the Rydberg dressing second-order fluorescence and fourth-order fluorescence is first investigated. A corresponding theory is presented, which is consistent with the experimental results. Such blockade evolution regularity has potential applications in quantum control, and the Rydberg dressing may be useful for investigating multiple-body interactions, as well as for inducing short range interactions in Bose-Einstein condensates.

Synthesis of silane‐grafted ethylene vinyl acetate copolymer and its application to compatibilize the blend of ethylene‐propylene‐diene copolymer and silicone rubber

“…Figure c reveals that the O1s spectrum of EVA‐g‐VTMS splits into three components of OC at 533.1 eV, OC at 531.8 eV, and OSi at 532 eV, which are consistent with those of C1s. Figure d exhibits two peaks in Si2p spectra of EVA‐g‐VTMS, whose peak positions are 101.8 eV (SiC) and 102.2 eV (SiO), respectively . The finding of XPS verifies the result of FTIR spectroscopy analysis.…”

Switchable dynamic Rydberg-dressed excitation via a cascaded double electromagnetically induced transparency

“…So far, a few pioneer works studying EIT effect in a four-level atomic system have originated from Agarwal [20] and Harris [21], describing the absorption of two photons controlled by quantum interference between the two excitation paths. Later, a number of theoretical works studying the nonlinear optical feature are represented in similar systems [22][23][24]. Recently a more complex four-step excitation scheme is achieved in which the uppermost Rydberg state has a large dipole moment [25].…”

Vibrational Raman optical activity of bicyclic terpenes: comparison between experimental and calculated vibrational Raman, Raman optical activity, and dimensionless circular intensity difference spectra and their similarity analysis

“…2 In Figs 2-6, it can be seen that the ω À1 δ 2 k contributions are generally much smaller than those of ω À1 γ 2 k contributions for all five terpenes investigated. These contributions have been experimentally determined for α-pinene and trans-pinane by Che and Nafie, [18] which indicated that the experimental ω À1 γ 2 k contributions are relatively smaller than those of ω À1 δ 2 k contributions. The consensus that EDEQ polarizability contributions are generally smaller than EDMD polarizability contributions has been verified by the present B3LYP/aug-cc-pVDZ calculations for all five bicyclic terpenes.…”

“…The same baseline tolerance and robustness threshold parameters chosen for experimental spectra are applied to the QC calculated spectra. The similarity overlap between experimental and QC predicted spectra are presented using SimRaman, SimROA, and SimCID, quantities, where each Sim quantity is defined according to Tanimoto scoring function, [32] as [35] SimXXX ¼ I f g I f f þ I gg À I f g (18) In Eqn (18), I fg = ∫f(x : ξ)g(x)dx and f(x : ξ) represent the calculated spectrum as a function of vibrational frequency scale parameter ξ and g(x) represents the experimental spectrum, both as a function of x-axis (representing the vibrational wavenumbers).…”

“…The experimental measurements in at least two different scattering geometries are needed to extract the latter two contributions individually. [18] One of the bicyclic terpenes, α-pinene, has larger VROA signals and has been used as a default standard through all of the developmental stages of VROA spectroscopy, beginning from one of the very first VROA measurements [10] all the way to the recent instrumental developments. [17] A few other bicyclic terpenes have also been investigated along the way because of the advantages associated with their conformational rigidity in analyzing the experimental spectra, [19,20] and a review indicating the usefulness of VROA spectroscopy for studying terpenes has been reported.…”