Forthcoming radio surveys will include full polarisation information, which can be potentially useful for weak lensing observations. We propose a new method to measure the (integrated) gravitational field between source and observer, by looking at angle morphology of galaxy orientation polarisation. For this we use fact that, while photon is parallel transported along geodesic, infinitesimal sh...

Correlations of the type discussed by EPR in their original 1935 paradox for continuous variables exist for the quadrature phase amplitudes of two spatially separated fields. These correlations were experimentally reported in 1992. We propose to use such EPR beams in quantum cryptography, to transmit predetermined messages in such a way that the receiver and sender may later determine whether e...

This thesis concerns the development and application of time resolved fluorescence which yield new and detailed information on molecular order and motion in both isotropic and ordered systems. Polarised fluorescence studies involve the photoselection of a non-equilibrium distribution of excited state probe orientations whose relaxation is monitored by time resolved fluorescence anisotropy. Chap...

Spontaneous parametric downconversion is the primary source to generate entangled photon pairs in quantum photonics laboratories. Depending on experimental design, generated can be correlated frequency spectrum, polarisation, position-momentum, and spatial modes. Exploring modes' correlation has hitherto been limited polar coordinates' azimuthal angle, a few attempts study Walsh modes radial st...

For the p ( ! ;K+) 0 reaction, polarisation observables were measured using linearly polarised photons in CLAS, during the G8a experiment in the summer of 2001. Using the CEBAF accelerator facility in Virginia, USA, an incident electron beam energy of 5.7 GeV was achieved. The electron beam then passed into the newly commissioned Coherent Bremsstrahlung Facility, producing a beam of linearly po...

We consider the fidelity of vector meson dominance (VMD) assumption as an instrument for relating electromagnetic vector-meson production reaction $e + p \to e^\prime V p$ to purely hadronic process $V V+p$. Analyses photon vacuum polarisation and photon-quark vertex reveal that such a VMD Ansatz might be reasonable light vector-mesons. However, when vector-mesons are described by momentum-depe...

A non-minimal photon-torsion axial coupling in the quantum elec-trodynamics (QED) framework is considered. The geometrical optics in Riemann-Cartan spacetime is considering and a plane wave expansion of the electromagnetic vector potential is considered leading to a set of the equations for the ray congruence. Since we are interested mainly on the torsion effects in this first report we just co...

A theory for multiphoton fluorescence imaging in high aperture scanning optical microscopes employing finite sized detectors is presented. The effect of polarisation of the fluorescent emission on the imaging properties of such microscopes is investigated. The lateral and axial resolutions are calculated for one-, twoand three-photon excitation of p-quaterphenyl for high and low aperture optica...

The measurement of triple differential dijet cross sections in e±p interactions in the H1 experiment in the region of photon virtualities 2 < Q < 80GeV, inelasticities 0.1 < y < 0.85, jet transverse energies E∗ T 1 > 7GeV, E ∗ T 2 > 5GeV, and pseudorapidities −2.5 < η∗ 1 , η∗ 2 < 0 is presented. The analysis was done in the γ∗p centre-of-mass frame using an integrated luminosity of 57.6 pb−1. T...