Atom photonics

Cohen-Tannoudji C, Dupont-Roc J and Grynberg G 1992 Atom-Photon Interactions Basic Processes and Applications (New York Wiley)... 

The new delightful book by Greenstein and Zajonc(9) contains several examples where the outcome of experiments was not what physicists expected. Careful analysis of the Schrddinger equation revealed what the intuitive argument had overlooked and showed that QM is correct. In Chapter 2, Photons , they tell the story that Einstein got the Nobel Prize in 1922 for the explaining the photoelectric effect with the concept of particle-like photons. In 1969 Crisp and Jaynes(IO) and Lamb and Scullyfl I) showed that the quantum nature of the photoelectric effect can be explained with a classical radiation field and a quantum description for the atom. Photons do exist, but they only show up when the EM field is in a state that is an eigenstate of the number operator, and they do not reveal themselves in the photoelectric effect. 

S atom = - photon equality includes a negative sign because the atom loses energy. 

Sensitometric tests at variable light intensity I under conditions of photography, achieved on emulsions doped at the relative concentration of 10 mol HCO2 per mol Ag, confirmed the photo-induced bielectronic transfer (Fig. 15, bottom) [200]. The emulsion is completely stable in the dark. The number of photons required to induce development of the same grain population fraction is 5 times less (after immediate development) or 10 times less (development delayed by 20 min after exposure) in doped than in undoped emulsions where < eff=0.20. The quantum yield is thus close to the theoretical limit atom/photon in immediately developed doped emulsion (7 = 0),... 

C. Cohen-Tannoudji, J. Dupont-Roc, and G. Grynberg. Atom-Photon Interactions. John Wiley Sons, Inc., New York (1992). 

Cohen Tannoudji, C. Duponi-Rnc. ).. and G. Grynherg Atom-Photon Interactions Ba.su Piwesses and Applications John Wiley Sons. Inc.. New York. NY. 199ft. Corcoran. E. "Dimensioning Dimensions," Sri Amer, 122 (November 1990). Clint, KH. "State and Bond-Selected Unimolecular Reactions," St ioni c. 1387 I September 21. I99l)t... 

If the last condition is fulfilled, the second term in (8.14b) can be neglected, and the approximation is called the dipole approximation. In this case the exponential function ek-r in (8.13) reduces to unity, and the operator describing the atom-photon interaction in equ. (8.12) to... 

Electron spectrometry of atoms using synchrotron radiation has become an increasing and important field of fundamental physics within the last two decades. The increasing availability of dedicated facilities with tunable synchrotron radiation has allowed detailed exploration of the atom-photon interaction which must take into account the electron-electron interactions, usually termed electron correlations. The parallel experimental and theoretical developments have permitted rather sophisticated investigations of the response of the atomic many-electron... 

Here, a is the Dirac matrix, E is a certain energy parameter, and Ho is the Hamiltonian of an isolated atom whose eigenvalues are denoted by er Ho r) = er r). Equation (4) can be readily inferred (see paper of V. Yakhontov in this volume) by taking into account the relativistic atom-photon field interaction... 

C. Cohen-Tannoudji, J. Dudpont-Roc, G. Grynberg Atom-photon interactions basic processes and applications Vol. 2 (Weiley Interscience, New York 1998)... 

In the dipole approximation, the relativistic atom-photon field interaction V(r,t) takes the form [4]... 

We now turn to a quantitative examination of the feasibility of conditional Fock state generation using our preparation and retrieval technique. For applications in long-distance quantum communication, the quality of the atomic state preparation is the most important quantity. Assuming perfect atom-photon correlations in the write Raman processes, we can find the density matrix p for the number of atomic spin-wave excitations conditioned on the detection of ns Stokes photons. Here we consider only the spin-wave modes correlated with our detection mode. For example, in the absence of losses and background, the conditional atomic density matrix is simply p(ns) = ns)(ns. Loss on the Stokes channel (characterized by transmission coefficient a.s) leads to a statistical mixture of spin-wave excitations,... 

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