Journal ArticleDOI
Accurate calculation of dynamic Stark shifts and depopulation rates of Rydberg energy levels induced by blackbody radiation. Hydrogen, helium, and alkali-metal atoms
John W. Farley,William H. Wing +1 more
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In this paper, a highly excited (Rydberg) atom bathed in blackbody radiation is perturbed in two ways: a dynamic Stark shift is induced by the off-resonant components of the black body radiation.Abstract:
A highly excited (Rydberg) atom bathed in blackbody radiation is perturbed in two ways. A dynamic Stark shift is induced by the off-resonant components of the blackbody radiation. Additionally, electric-dipole transitions to other atomic energy levels are induced by the resonant components of the blackbody radiation. This depopulation effect shortens the Rydberg-state lifetime, thereby broadening the energy level. Calculations of these two effects in many states of hydrogen, helium, and the alkali-metal atoms Li, Na, K, Rb, and Cs are presented for $T=300$ K. Contributions from the entire blackbody spectrum and from both discrete and continuous perturbing states are included. The accuracy is considerably greater than that of previous estimates.read more
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Journal ArticleDOI
Factors affecting lifetimes and resolution of Rydberg states observed in zero-electron-kinetic-energy spectroscopy
TL;DR: In this article, it was shown that under the usual conditions of zero-electron-kinetic energy, pulsed field ionization (ZEKE-PFI) spectroscopy, the lifetimes of very high-lying Rydberg states are increased by at least approximately the factor n (in addition to the expected factor of n3), the principal quantum number, due to strong l mixing by the Stark effect.
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Quasiclassical calculations of blackbody-radiation-induced depopulation rates and effective lifetimes of Rydberg nS , nP , and nD alkali-metal atoms with n≤80
TL;DR: In this article, a wide range of principal quantum numbers for depopulation by blackbody radiation (BBR) and effective lifetimes of alkali-metal $nS, $nP, and $nD$ Rydberg states have been calculated in the ambient temperatures of 77, 300, and 600 K. Good agreement of their numerical results with the available theoretical and experimental data has been found.
Journal ArticleDOI
Dipole blockade in a cold Rydberg atomic sample [Invited]
Daniel Comparat,Pierre Pillet +1 more
TL;DR: In this article, a review of the studies performed about interactions in an assembly of cold Rydberg atoms is presented, focusing especially on the review of dipole-dipole interactions and on the effect of the dipole blockade in the laser rydberg excitation, which offers attractive possibilities for quantum engineering.
Journal ArticleDOI
Multipolar theory of blackbody radiation shift of atomic energy levels and its implications for optical lattice clocks
TL;DR: In this article, the dominant electric-dipole contributions are computed using accurate relativistic many-body techniques of atomic structure, and the resulting uncertainties in the $E1$ BBR shifts are large and substantially affect the projected $10}^{\ensuremath{-}18}$ fractional accuracy of the optical-lattice-based clocks.
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New Measurement of the 1S-3S Transition Frequency of Hydrogen: Contribution to the Proton Charge Radius Puzzle.
Helene Fleurbaey,Sandrine Galtier,Simon Thomas,Marie Bonnaud,L. Julien,François Biraben,F. Nez,Michel Abgrall,Jocelyne Guéna +8 more
TL;DR: A new measurement of the 1S-3S two-photon transition frequency of hydrogen is presented, realized with a continuous-wave excitation laser at 205 nm on a room-temperature atomic beam, with a relative uncertainty of 9×10^{-13}.