1,721,159 research outputs found
AHARONOV-CASHER EFFECT AND GEOMETRICAL PHASES
No full textThe phaseshift experienced by a neutral particle with a magnetic moment as it encircles an infinite line of charge (Aharonov-Casher effect) is derived as a special case of geometrical phases, i.e. the standard Berry phase and the gauge-invariant Yang phase
GENERALIZED YANG PHASE FOR OPEN SYSTEMS
No full textA generalization of the gauge-invariant Yang phase for open systems (described by non-Hermitian (NH) Hamiltonians) is derived by a biorthonormal-state approach. It is shown that the NH Yang phase is invariant under nonunitary bicanonical transformations
QUASAR REDSHIFTS IN ISO-MINKOWSKI SPACES
No full textWe suggest a possible interpretation of the large redshifts of quasars in terms of a deformation of their interior metric, based on Santilli's Lie-isotopic lifting of special relativity. The Lie-isotopic Doppler effect is due to the inhomogeneity and anisotropy of the hyperdense quasar's atmosphere. Numerical estimates are derived from available astrophysical data, which indicate a possible revision of the speed of quasars with respect to the associated galaxy, while leaving current views on the expansion of the universe completely unaffected
YANG PHASE FOR NONHERMITIAN SYSTEMS AND BIUNITARY TRANSFORMATIONS
No full textWe introduce a non-Hermitian (nH) generalization of the gauge-invariant Yang-Kobe phase for non-conservative quantum systems. The nH Yang phase is shown to be invariant under non-unitary (bicanonical) transformations, unlike the nH generalization of Berry's phase. It arises for a system evolution that is neither adiabatic nor cyclic, and its relations with the Samuel-Bhandari phase are briefly outlined
The reaction e(+)e(-) gamma pi(0) gamma nu(nu)over-bar as a probe of neutrino mass
No full textThe reaction e(+)e(-) --> gamma pi(0) --> gamma nu is considered. It is shown that this The reaction ef reaction possesses a clear signature, producing in the resonance region practically monochromatic photons, which can easily be distinguished from background bremsstrahlung photons. Since the cross section of the reaction is proportional to the square of the neutrino mass, such a reaction can be used as a probe for neutrino mass. (C) 1997 American Institute of Physics
- …
