Einstein’s theory predicts that, massive test particles with nonzero spin or angular momentum, in an external gravitation field, follow geodesics which depend upon the orientation of the spin-angular momentum [1]. It has been claimed [2] that such an effect also holds for photons i.e. photons with different helicities follow different geodesics in the gravitational field of a rotating body. If ...

Two distinct polarised neutron techniques are applicable to the. study of magnetic diffuse scattering. The first, used for ferromagnetic alloys, employs a polarised incident beam without analysis of the outgoing polarisation. This method has been widely used, chiefly by the Oak Ridge group, to study moment disturbances in ferromagnetic binary transition metal alloys. The second technique involv...

Our present information on the gluon polarisation ∆g/g is reviewed. The data from fixedtarget lepton–nucleon experiments are in context with the recent data from the RHIC polarised pp collider. The main tools to study ∆g/g in lepton–nucleon scattering are scaling violations of the g1 structure functions and longitudinal spin asymmetries in hadron production. Results from high-pT hadron pairs, i...

We show that for a quantum wire with local asymmetric scattering potential the principal channels charge and heat rectification decouple renormalise differently under electron interactions, generally being more relevant. The polarisation of results from interference is tuneable through external gating. Furthermore, spin polarised or helical electrons sufficiently strong interactions regime can ...

We illustrate the use of the invariant spin field for describing permissible equilibrium spin distributions in high energy spin polarised proton beams. 1 A problem and its solution Following the successful attainment of longitudinal e ± polarisation in HERA (Article II) it is natural to consider whether it would be possible to complement the polarised e ± with 820GeV polarised protons [1, 2]. A...

Photochemically induced dynamic nuclear polarisation (photo-CIDNP) in intact bacterial reaction centres has been observed by 13C-solid state NMR under continuous illumination with white light. Strong intensity enhancement of 13C NMR signals of the aromatic rings allows probing the electronic ground state of the two BChl cofactors of the special pair at the molecular scale with atomic selectivit...

For the design of the International Linear Collider (ILC) a polarised positron source based on a helical undulator system has been proposed. In order to optimise the positron beam, i.e. to ensure high intensity as well as high degree of polarisation, a measurement of the polarisation close to the positron creation point is envisaged. In this contribution methods to determine the positron polari...

We consider the representations of optical Dirac equation, especially ones where Hamiltonian is purely real-valued. This equivalent, for Maxwell's equations, to Majorana representation massless (Weyl) equation. draw analogies between Dirac, chiral and derive two new representations. Just as are related spin helicity states, these equation associated with linear polarisation light. provides a me...

A bidentate iridium carbene complex, Ir(κC,O-L1)(COD), has been synthesised which contains a strongly electron donating carbene ligand that is functionalised by a cis-spanning phenolate group. This complex acts as a precursor to effective magnetisation transfer catalysts which form after reaction with H2 and a suitable two electron donor. In solvents such as benzene, containing pyridine, they a...