Objective
Several quantum (nonclassical) states of light are known, among them Fock states, entangled states, squeezed states, and some others. They have found applications in certain fields such as metrology, spectroscopy, communication, and tests of quantum mechanics. Polarization is one of the most important properties of nonclassical light and plays the central role in most of applications. The project is aimed at developing new types of nonclassical light based on polarization as well as at finding further applications of the known types of nonclassical light.
The new types of nonclassical light include:
arbitrary polarization states of two photon light, polarization-scalar light, arbitrary polarization states of three and four photon light.
It is also proposed to perform new kinds of polarization transformations for nonclassical states, namely, nonlinear polarization transformations of two photon light based on phase conjugating mirrors. More simple linear transformations will be performed over three and four photon states.
New applications of nonclassical polarization states of light include:
calibration of analogue detectors, study of ferroelectric quasi periodic domain structures, qutrit communication, loophole free tests of local realism.
The project combines three mutually connected groups of tasks, which are preparation and measurement ('tomography') of new states, their transformations, and applications. Proposed research activities are both theoretical and experimental. The experiments will be performed with weak collinear and noncollinear two photon beams (in cw and pulsed cases) and with twin beams generated using optical parametric oscillator.
The expected results are:
generation of two photon light and multi photon light in arbitrary polarization states, generation of polarization-scalar light both in two photon and twin beam regimes, development of 'polarization tomography' for nonclassical light and using it for the study of domain structures in ferroelectric crystals, development of a new method of photodetectors calibration, development of ternary quantum communication based on polarization and energy time entanglement, quantum efficiency loophole free tests of local realism with non maximally entangled two photon states.
Call for proposal
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70126 Bari
Italy