Results 1 to 10 of about 444,836 (121)
Newton-Cartan Gravity and Torsion [PDF]
, 2017 We compare the gauging of the Bargmann algebra, for the case of arbitrary torsion, with the result that one obtains from a null-reduction of General Relativity.
Cheng-Yan Mou (4269523) +7 more
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, 2007 Z_NxZ_M orbifold models admit the introduction of a discrete torsion phase. We find that models with discrete torsion have an alternative description in terms of torsionless models. More specifically, discrete torsion can be 'gauged away' by changing the
Ploger, Felix +3 more
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On the interaction of massive spinor particles with external electromagnetic and torsion fields [PDF]
, 1998 We explore the Dirac equation in external electromagnetic and torsion fields. Motivated by the previous study of quantum field theory in an external torsion field, we include a nonminimal interaction of the spinor field with torsion.
Audretsch +25 more
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On torsion in finitely presented groups [PDF]
, 2016 We give a uniform construction that, on input of a recursive presentation $P$ of a group, outputs a recursive presentation of a torsion-free group, isomorphic to $P$ whenever $P$ is itself torsion-free.
Chiodo, Maurice
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Monotone-light factorisation systems and torsion theories [PDF]
, 2013 Given a torsion theory (Y,X) in an abelian category C, the reflector I from C to the torsion-free subcategory X induces a reflective factorisation system (E, M) on C. It was shown by A. Carboni, G.M. Kelly, G. Janelidze and R.
Everaert, Tomas, Gran, Marino
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Secondary-Structure Design of Proteins by a Backbone Torsion Energy [PDF]
, 2005 We propose a new backbone-torsion-energy term in the force field for protein systems. This torsion-energy term is represented by a double Fourier series in two variables, the backbone dihedral angles phi and psi.
Berendsen H. J. C. +30 more
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Modeling of torsion stress giant magnetoimpedance in amorphous wires with negative magnetostriction
, 2007 A model describing the influence of torsion stress on the giant magnetoimpedance in amorphous wires with negative magnetostriction is proposed. The wire impedance is found by means of the solution of Maxwell equations together with the Landau-Lifshitz ...
Antonov +39 more
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Discrete Torsion and Shift Orbifolds [PDF]
, 2003 In this paper we make two observations related to discrete torsion. First, we observe that an old obscure degree of freedom (momentum/translation shifts) in (symmetric) string orbifolds is related to discrete torsion.
Aspinwall +22 more
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Effective QFT and what it tells us about dynamical torsion
, 2010 The covariantly constant spacetime torsion is one of the fields which may break Lorentz and CPT symmetry. We review the previous works on the dynamical torsion in the framework of effective quantum field theory (QFT).
Shapiro, Ilya L.
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The action for the (propagating) torsion and the limits on the torsion parameters from present experimental data [PDF]
, 1997 Starting from the well established form of the Dirac action coupled to the electromagnetic and torsion field we find that there is some additional softly broken local symmetry associated with torsion.
Belyaev, A. S., Shapiro, Ilya L.
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