Results 61 to 70 of about 428,741 (193)
Variational problem for the Frenkel and the Bargmann-Michel-Telegdi (BMT) equations
, 2014 We propose Lagrangian formulation for the particle with value of spin fixed within the classical theory. The Lagrangian turns out to be invariant under non-abelian group of local symmetries. As the gauge-invariant variables for description of spin we can
A. A. DERIGLAZOV +3 more
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Physical Review ResearchMotivated by the magnetism of pyrochlore oxides, we consider the effect of quantum fluctuations in the most general symmetry-allowed nearest-neighbor Kramers exchange Hamiltonian on the pyrochlore lattice.
Lasse Gresista +4 more
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Trigonometric version of quantum–classical duality in integrable systems
Nuclear Physics B, 2016 We extend the quantum–classical duality to the trigonometric (hyperbolic) case. The duality establishes an explicit relationship between the classical N-body trigonometric Ruijsenaars–Schneider model and the inhomogeneous twisted XXZ spin chain on N ...
M. Beketov +3 more
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Anomalous magneto-oscillations and spin precession
, 2001 A semiclassical analysis based on concepts developed in quantum chaos reveals that anomalous magneto-oscillations in quasi two-dimensional systems with spin-orbit interaction reflect the non-adiabatic spin precession of a classical spin vector along the ...
C. Emmrich +7 more
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Dynamics of spin relaxation in nonequilibrium magnetic nanojunctions
New Journal of PhysicsWe investigate nonequilibrium phenomena in magnetic nano-junctions using a numerical approach that combines classical spin dynamics with the hierarchical equations of motion technique for quantum dynamics of conduction electrons.
Rudolf Smorka +2 more
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Spin supplementary condition in quantum field theory: covariant SSC and physical state projection
Journal of High Energy Physics, 2023 The spin supplementary conditions are constraints on spin degrees of freedom in classical relativity which restricts physical degrees of freedom to rotations.
Jung-Wook Kim, Jan Steinhoff
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Low Energy Effective Field Theories of Sp(4) Spin systems
, 2009 We study the classical and quantum phase transitions of Sp(4) spin systems on three dimensional stacked square and triangular lattices. We present general Ginzburg-Landau field theories for various types of Sp(4) spin orders with different ground state ...
Cenke Xu, M. Nakahara
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Interaction vertex for classical spinning particles [PDF]
Physical Review D, 2016 We consider a model of the classical spinning particle in which the coadjoint orbits of the Poincare group are parametrized by two pairs of canonically conjugate four vectors, one representing the standard position and momentum variables and the other which encodes the spinning degrees of freedom.
Rempel, Trevor, Freidel, Laurent
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Classical and quantum two-dimensional anisotropic Heisenberg antiferromagnets
, 2007 The classical and the quantum, spin $S=1/2, versions of the uniaxially anisotropic Heisenberg antiferromagnet on a square lattice in a field parallel to the easy axis are studied using Monte Carlo techniques. For the classical version, attention is drawn
Holtschneider, M., Selke, W., Wessel, S.
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Journal of Modern Physics, 2012 With the development of local gauge theories of gravitation, it became evident that intrinsic spin was an integral part of the theory. This gave spin a classical formulation that predicted the existence of a new kind of field, the torsion field. To date only one class of experiments has been developed to detect this field, a search for a long range ...
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