Vacuum Structures in Hamiltonian Light-Front Dynamics

Details Vacuum Structures in Hamiltonian Light-Front Dynamics Vacuum Structures in Hamiltonian Light-Front Dynamics

1993-05-10

arxiv.org/abs/nucl-th/9305005v1

Found.Phys.24:387-400,1994

Physics

Nuclear Physics

Nuclear Theory

16 pages, report \# ANL-PHY-7524-TH-93, (Latex)

Scientific paper

10.1007/BF02058099

Hamiltonian light-front dynamics of quantum fields may provide a useful approach to systematic non-perturbative approximations to quantum field theories. We investigate inequivalent Hilbert-space representations of the light-front field algebra in which the stability group of the light-front is implemented by unitary transformations. The Hilbert space representation of states is generated by the operator algebra from the vacuum state. There is a large class of vacuum states besides the Fock vacuum which meet all the invariance requirements. The light-front Hamiltonian must annihilate the vacuum and have a positive spectrum. We exhibit relations of the Hamiltonian to the nontrivial vacuum structure.

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