Singh, P. and Ryder, L.H. (1997) Einstein-Cartan-Dirac theory in the low-energy limit. Classical and Quantum Gravity, 14 (12). pp. 3513-3525. ISSN 0264-9381.
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We look for manifestations of the effects of torsion in the low-energy limit in the context of Einstein-Cartan-Dirac theory (or any theory of gravity in which the torsion tensor is purely axial). To proceed, we introduce the mathematical law governing the transport of orthonormal bases or tetrads in a spacetime with torsion. This law is applied to compute the metric and connection in a rotating and accelerating frame, or laboratory. A spin- 1/2 particle is placed in this rotating and accelerating frame and the low-energy limit of the Dirac equation is taken by means of the Foldy-Wouthuysen transformation. In addition to obtaining the Bonse-Wroblewski phase shift due to acceleration, Sagnac-type effects, rotation-spin couplings of the Mashhoon type, redshift of the kinetic energy and the spin-orbit coupling term of Hehl and Ni, we also obtain several interesting and significant terms as a consequence of introducing torsion into spacetime. We give a detailed interpretation of these additional terms and discuss their observability in the light of current well-known experimental techniques.
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences|
|Depositing User:||T.J. Sango|
|Date Deposited:||13 May 2009 05:58|
|Last Modified:||13 May 2009 05:58|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/17953 (The current URI for this page, for reference purposes)|
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