Buscar
Mostrando ítems 161-170 de 394
On equivalence of Duffin-Kemmer-Petiau and Klein-Gordon equations
(Sociedade Brasileira Fisica, 2000-06-01)
A strict proof of equivalence between Duffin-Kemmer-Petiau (DKP) and Klein-Gordon (KG) theories is presented for physical S-matrix elements in the case of charged scaler particles interacting in minimal way with an external ...
Path integral representations in noncommutative quantum mechanics and noncommutative version of Berezin-Marinov action
(SPRINGER, 2008)
It is known that the actions of field theories on a noncommutative space-time can be written as some modified (we call them theta-modified) classical actions already on the commutative space-time (introducing a star product). ...
Geometrical unification of gravitation and electromagnetism.
A theory which unifies gravitation and electromagnetism (GUGE) is presented. This new theory is based on a recent redefinition of proper time. The 5-dimensional metric which arises is similar but not equivalent to the ...
Non-relativistic quantum field theory of Verlinde's emergent entropic gravity
(Academic Press Inc Elsevier Science, 2020-01)
Non relativistic quantum field theory propagators are indispensable tools in nuclear physics and condensed matter theory. Here we apply them to gravitation, that is, discuss a non relativistic quantum field theory for ...
Four-point amplitude from open superstring field theory
(Elsevier B.V., 2000-04-06)
An open superstring field theory action has been proposed which does not suffer from contact term divergences. In this paper, we compute the on-shell four-point tree amplitude fi om this action using the Giddings map. After ...
Four-point amplitude from open superstring field theory
(Elsevier B.V., 2000-04-06)
An open superstring field theory action has been proposed which does not suffer from contact term divergences. In this paper, we compute the on-shell four-point tree amplitude fi om this action using the Giddings map. After ...
Conformal field theory for the superstring in a Ramond-Ramond plane wave background
(2002-04-01)
A quantizable worldsheet action is constructed for the superstring in a super-symmetric plane wave background with Ramond-Ramond flux. The action is manifestly invariant under all isometries of the background and is an ...
Conformal field theory for the superstring in a Ramond-Ramond plane wave background
(2002-04-01)
A quantizable worldsheet action is constructed for the superstring in a super-symmetric plane wave background with Ramond-Ramond flux. The action is manifestly invariant under all isometries of the background and is an ...
Equivalence between the semiclassical and effective approaches to gravity
(Iop Publishing Ltd, 2010-07-21)
Semiclassical and effective theories of gravitation are quite distinct from each other as far as the approximation scheme employed is concerned. In fact, while in the semiclassical approach gravity is a classical field and ...