The Institute of Physics ( IOP ) по журналам "Journal of Optics B: Quantum and Semiclassical Optics"
Отображаемые элементы 2140 из 243

(20001001)We study the dynamics of ultracold atoms in an optical lattice under constant bias. After recapitulating the ideas underlying Bloch oscillations and Zener's formula for interband transitions, the BlochZener scenario is ...

(20000401)We analyse the efficiency of quantum cloning for qubits. We investigate, in particular, the role played by the form of allowed input states and show how the fidelity of cloning changes by restricting the class of inputs.

(20001001)We analyse the dynamics of a weakly indexguided semiconductor laser operating near threshold and with optical feedback, using the LangKobayashi model. Lateral effects are included, taking into account lateral carrier ...

(20000601)A theory of intracavity fourthharmonic generation has been developed in the constant intensity approximation with account of changes in the interacting wave phases. The effect both of the phase mismatch and of the absorption ...

(19990201)A theoretical investigation of cavity QED effects in semiconductor microcavities containing quantum wells is presented. A model Hamiltonian is used to derive equations of motion for the quantum photon and exciton fields ...

(19990801)We discuss the characterization of continuous variable, optical quantum teleportation in terms of the twoquadrature signal transfer and conditional variances between the input and output states. We derive criteria which ...

(20001201)The phase space of a lossmodulated CO2 laser is experimentally investigated with the use of the technique of shortlived pulse loss perturbations. A coexistence of two and three attractors is shown in a wide range of the ...

(19991001)The characteristics of the quantum optical complementarity principle and the coherence of the photons generated in a MachZehnder interferometer with two degenerate optical parametric amplifiers are analysed. The photon ...

(19991001)Coherent states provide an appealing method to reconstruct efficiently the pure state of a quantum mechanical spin s. A SternGerlach apparatus is used to measure (4s+1) expectations of projection operators on appropriate ...

(20000401)We present a general unified approach for finding the coherent states (CSs) of polynomially deformed algebras such as the quadratic and Higgs algebras, which are relevant for various multiphoton processes in quantum optics. ...

(19990401)The quantum field theory for the onedimensional Schrödinger equation with attractive delta function potentials is used for treating the dynamics of collisions between a small number of photons in a nonlinear Kerr medium. ...

(19991001)Two standard criteria of the photon antibunching for nonstationary fields are compared. A new criterion, obtained by direct application of the CauchySchwarz inequality, is proposed. All three definitions, based on the ...

(19991001)Previous work on the twotime photonnumber correlations of quantum nonstationary fields has focused on the demonstration of selfcontradictory predictions of the photon antibunching according to different definitions. ...

(19990601)Using conditional measurement on a beam splitter, we study the transformation of the quantum state of the signal mode within the concept of twoport nonunitary transformation. Allowing for arbitrary quantum states of both ...

(20001201)We have developed a quantum theory of the micromaser for a pair of twolevel atoms for the case of one and twophoton transition coupling. We have studied the effect of cooperativity on the photon statistics for these ...

(20000801)In this paper we derive a general approach using correlation functions for interpreting the results of measurements on twoparticle entangled states. In our analysis we explicitly take into account the detector efficiency. ...

(19990401)The cutoff rate performance of quantum communication channels is considered when the signal quantum states are pure and symmetric. The properties of the quantum cutoff rate which is obtained by the entangled measurement ...

(20000601)We introduce the quantitative measures characterizing the rates of decoherence and thermalization of quantum systems. We study the time evolution of these measures in the case of a quantum harmonic oscillator whose relaxation ...

(20001001)We present a rigorous first principles derivation of the heuristic approach behind most of cavity QED: the quantization of the field in a highQ cavity as if the mirrors were perfect with losses modelled by a coupling ...

(20000801)The design of squeezing by a timedependent harmonic oscillator is considered. The predetermined general timedependent squeezing transformations are taken as the starting point from which the time evolution operator U(t,0) ...
Отображаемые элементы 2140 из 243