Results 181 to 190 of about 4,691 (227)

Squeezing in a Rydberg Atom Maser

Physical Review Letters, 1985
We show theoretically that a Rydberg atom maser produces during its evolution a squeezed field with sub-Poissonian statistics. We give a semiclassical interpretation of this effect.
, Heidmann, , Raimond, , Reynaud
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Subrecoil cooling of Rydberg atoms

Physical Review A, 1995
Two mechanisms for production of an ensemble of atoms in a highly excited state with very narrow distribution of the atomic center-of-mass momentum (cold Rydberg atoms) are proposed. The mechanisms are based on velocity-selective $\ensuremath{\pi}$ pulses and coherent population trapping in three-level cascade systems with the uppermost state being the
, Korsunsky, , Rozhdestvensky
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Radiative Rydberg-atom–Rydberg-atom collisions in the strong-field regime

Physical Review A, 1987
We describe the experimental observation of the resonant collisional energy transfer Na(ns)+Na(ns)+qh\ensuremath{\nu}\ensuremath{\rightarrow}Na(np)+Na[(n-1)p]+(q○)h\ensuremath{\nu} which occurs when the Na atoms in a strong microwave field are tuned in energy with a static field so that the energy resonance ${E}_{\mathrm{ns}}$+${E}_{\mathrm{ns}}$=${E}_{
, Pillet, , Kachru, , Tran, , Smith, , Gallagher   +4 more
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Strong autoresonance excitation of Rydberg atoms: The Rydberg accelerator

Physical Review A, 1990
A classical mechanism is proposed for the many-photon ionization of Rydberg atoms in a quasimonochromatic oscillating electric field with an amplitude smaller than the stochasticity threshold. The mechanism is based on the dynamic autoresonance between the slowly varying frequency of the oscillating field and the Keplerian frequency (or one of its ...
, Meerson, , Friedland
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Rydberg-atom-Rydberg-atom ionisation cross sections

Journal of Physics B: Atomic and Molecular Physics, 1979
A four-body classical-trajectory Monte Carlo method has been applied to Rydberg-atom-Rydberg-atom scattering problems. Numerical calculations were conducted over the velocity range ve/3 to 3v2 where v2(au)=1/n and n is the principal quantum number of the Rydberg atom.
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Rydberg Atoms

1994
In recent years, Rydberg atoms have been the subject of intense study, becoming the testing ground for several quantum mechanical problems. This book provides a comprehensive description of the physics of Rydberg atoms, highlighting their remarkable properties by reference to their behaviour in a wide range of physical situations. Following an overview
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Atomic Rydberg States

1982
Publisher Summary This chapter is devoted to the production and detection of Rydberg states; every experiment starts and ends with these processes. The main results of spectroscopic studies are analyzed and a strong emphasis is placed on the effects of external fields as this is probably the domain where the most interesting and sometimes surprising ...
Serge Feneuille, Pierre Jacquinot
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Collective Excitations of Bose–Einstein Condensate in a Rydberg Atom

Journal of Low Temperature Physics
In this work, we investigated a Bose-Einstein condensate (BEC) inside a Rydberg atom. We first observed the density profile of the system using the Gross-Pitaevskii equation, and then we used the Bogoliubov theory to examine the collective excitation ...
Dwipesh Majumder
exaly   +2 more sources

Rydberg Atoms in Curved Space-Time

Physical Review Letters, 1993
The possible use of loosely bound Rydberg atoms for remote gravimetric measurements is explored. The first-order corrections to the nonrelativistic nS and nP states for ng2 are obtained for the first time. A procedure to evaluate corrections of any order is outlined and applied to the 1S state in a spherical symmetry.
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Squeezing with Rydberg Atoms

Journal of Modern Optics, 1987
Abstract It is shown that some 17 Rydberg Na atoms initially placed into a coherent atomic state and super-radiating into a low-Q microwave cavity at temperatures T ≲ 0·4 K will show modest squeezing in the fluorescence field, the squeezing arising from terms oscillating at twice the cavity frequency.
M.R.B. Wahiddin, B.M. Garraway, R.K. Bullough   +2 more
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