Quantum-optical catalysis: Generating nonclassical states of light by means of linear optics
Physical Review Letters 88:25 I (2002) 2504011-2504014
Abstract:
The preparation and characterization of a new quantum state of light, a coherent superposition of the single-photon and vaccum states was discussed. This state was generalized by a catalytic process in which the single photon state enabled the interaction without being affected. A transition between a highly classical and a highly nonclassical state of light occurred by changing the amplitude of the target coherent state.Quantum-optical catalysis: generating nonclassical states of light by means of linear optics.
Physical review letters 88:25 Pt 1 (2002) 250401
Abstract:
We report preparation and characterization of coherent superposition states t[0>+alpha]1> of the electromagnetic field by conditional measurements on a beam splitter. This state is generated in one of the beam splitter output channels if a coherent state [alpha> and a single-photon Fock state [1> are present in the two input ports and a single photon is registered in the other beam splitter output. The single photon thus plays a role of a "catalyst:" it is explicitly present in both the input and the output channels of the interaction yet facilitates generation of a nonclassical state of light.Cabello's nonlocality and linear optics
Physical Review Letters 88:9 (2002) 989011
Abstract:
A study on the quantum nonlocality without inequalities and without probabilities for two observers was performed. Cabello's proposal for nonlocality was challenged and it was shown that nonlinear optics was required for a loophole-free demonstration of Cabello's nonlocality. Cabello had proposed a way of testing the inequality by means of linear optics and used the product of two observable quantities as a single quantum measurement.Nonclassical character of statistical mixtures of the single-photon and vacuum optical states
Physical Review A American Physical Society (APS) 65:3 (2002) 033830
Cabello's nonlocality and linear optics.
Physical review letters 88:9 (2002) 098901