Temperature dependence of blackbody-radiation-induced transfer among highly excited states of sodium

Radiative lifetime measurements of rubidium Rydberg states

“…The zero-Kelvin decay rates are obtained from the data using (8), assuming that the calculations of Beterov and co-workers for the BBR depopulation rates are correct. The straight lines are fits of the data to (2), i.e., we fit the data to the equation Γ [10], it is very difficult to shield any experiment from BBR from external sources. Most of the BBR absorbed by atoms in our apparatus will come from the walls of the vacuum chamber, and will have a radiation temperature close to 300 K. However, the atoms will also be illuminated by BBR from the Rb side-arm, and this source was heated to between 330 and 350 K. In other words, there is no single temperature that characterizes the BBR field, since the vacuum chamber is not in thermal equilibrium.…”

“…It is unclear, however, whether the BBR transition rates can be measured with sufficient precision to yield zero-Kelvin lifetimes with small enough uncertainties for useful comparison with theory. The two studies that have specifically addressed this question, those of Spencer et al [10] and Galvez et al [12], did not measure the BBR transfer rates explicitly. Rather, they showed that their models (based on theoretical rates) were consistent with the observed time-evolution of population over a range of Rydberg states [12], or that the observed variation of the radiative lifetime of a state with temperature was in agreement with calculations [10].…”

Quasiclassical calculations of blackbody-radiation-induced depopulation rates and effective lifetimes of RydbergnS,nP, andnБетеров1, Ryabtsev2, Tretyakov3 et al. 2009Phys. Rev. A374122512View full textAdd to dashboardCite

“…Radiative lifetimes of sodium nS and nD Rydberg states with 17≤n≤28 were measured by Spencer et al [6] in a cooled environment in order to reduce the influence of BBR. The temperature dependence of BBR-induced depopulation rate was measured experimentally for the sodium 19S state [7] and compared with numerical calculations. Theodosiou [8] performed the model-potential calculations of the effective lifetimes of alkali-metal Rydberg states with n≤21 for several ambient temperatures in the range from 0 to 720 K. Later on, model-potential calculations of radiative lifetimes for an extended range of n were done by He et al [9].…”

Dynamical localization in the microwave interaction of Rydberg atoms: The influence of noise

“…The destruction of quantum coherence by noise is central to many fields of physics and is reflected in the large number of papers recently published on this subject (see, e.g., Refs. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]). Of special interest here is the work reported in Ref.…”