The Institute of Physics ( IOP ) по журналам "Quantum Optics: Journal of the European Optical Society Part B"
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(19920601)The evolution of numberphase intelligent states in a directional coupler is studied looking at the conditions to reach the minimum number of photons needed for switching.

(19900201)The authors consider the problem of second harmonic generation in an optical cavity which contains both the laser and the nonlinear crystal. They calculate the spectrum of the amplitude fluctuations in the output field, ...

(19911001)The quantummechanical state of laser radiation near the generation threshold is studied. It is shown that there is a second threshold in laser generation which lies above the first one. At the second threshold coherence ...

(19940801)We review the effects of density dependent near dipoledipole, or local field, interactions on lasing without inversion. In particular, we consider the nonlinear behaviour of the macroscopic electric susceptibility of a ...

(19891201)The two basic interaction Hamiltonians for the quantum optical problems, namely the socalled minimal coupling one (p.A) and the multipolar one (d.E) are studied in the dipole approximation. The rigorous and exactly solvable ...

(19930401)The authors calculate the resonance fluorescence spectrum of a twolevel atom interacting with a resonant classical applied field and a squeezed vacuum for general values of the squeezing phase. They find that the spectra ...

(19940801)Analytic, limitedbandwidth signals, e.g. Gaussian wavepackets, whose frequencies lie in a transparent spectral window far below the resonance of an amplifying atomic medium, can propagate with phase, group, energy and ...

(19940801)The connection and similarity between two different models for lasing without inversion are studied, and various dressed state pictures enlighten its physical origin. Recent experiments on coherence effects in sodium are ...

(19940801)For pt. I see ibid. p. 231, 1994. We consider optical pumping in the multilevel sodium D1 manifold by several coherent light fields. Coherence between atomic states is taken into account by solving the complete density ...

(19940801)Transient lasing without inversion has been experimentally demonstrated in sodium vapour. The principle of this atomic coherence effect can be well understood from the theory of a simple fourlevel system. The experimental ...

(19940801)We derive an amplification condition which generalizes the traditional population inversion requirement for the basic schemes of inversionless amplification. We develop a selfconsistent quantum approach for the description ...

(19941001)It is shown that the Bayesian methods in statistics can be used to solve problems in continuous photodetection with dramatically reduced effort compared with the traditional superoperator approach.

(19920401)The Berry phases for a spherically symmetric atom in a circularly polarized semiclassical radiation field are calculated using an operator decomposition scheme. The author then takes the twolevel atomic limit and recovers ...

(19891201)Three characteristic functions are reviewed along with the quantum theory of linear systems and used to derive the Prepresentation, Wigner distribution and quasiprobability density of coherent states and squeezed states. ...

(19921201)The propagation of a light pulse through a nonlinear dispersionless fibre is investigated classically and quantum mechanically. Attention is paid to the instantaneous action of the Kerr medium. The difference between the ...

(19920601)The concept of a Schrodinger wavefunctional for an electromagnetic vector potential is used to give a new measure of localizability of photon states. The mathematical properties of the relevant infinitedimensional Hilbert ...

(19940801)We show that continuouswave, two colour excitation of threelevel atoms opens new channels of irreversible population transfer between atomic levels. This process, which we describe as dynamically induced irreversibility, ...

(19940801)We demonstrate a new technique for the mechanical manipulation of atoms with light that may be used to deflect or split an atomic beam. This technique depends on the existence of an internal superposition state of the atom ...

(19921001)The authors study a quantum nondemolition (QND) setup for the measurement of photon number, employing the optical Kerr effect. A method for the compensation of the negative effects of selfphase modulation is discussed. ...

(19940601)The question of phase measurement for a quantum oscillator using the quantum nondemolition principle (NDP), which does not need the use of the wave packet reduction postulate, is studied. It is shown that this approach ...
Отображаемые элементы 120 из 190