66 research outputs found
Covariant Quantization of The Super-D-string
We present the covariant BRST quantization of the super-D-string. The
non-vanishing supersymmetric U(1) field strength is essential for
the covariant quantization of the super-D-string as well as for its static
picture. A SO(2) parameter parametrizes a family of local supersymmetric (kappa
symmetric) systems including the super-D-string with and the
Green-Schwarz superstring with . We suggest that (canonical
conjugate of U(1) gauge field) plays a role of the order parameter in the
Green-Schwarz formalism: the super-D-string exists for while the
fundamental Green-Schwarz superstring exists only for .Comment: 19 pages, Latex; a paragraph added in section 5, to appear in
Nucl.Phys.B, email [email protected], [email protected]
O(D,D) gauge fields in the T-dual string Lagrangian
We present the string Lagrangian with manifest T-duality. Not only zero-modes
but also all string modes are doubled. The gravitational field is an O(D,D)
gauge field. We give a Lagrangian version of the section condition for the
gauge invariance which compensates the O(D,D) transformation from the
gravitational field and the GL(2D) coordinate transformation. We also show the
gauge invariance of the line element of the manifest T-duality space and the
O(D,D) condition on the background. Different sections describe dual spaces.Comment: 18 pages, Lualatex; v2: version appears in JHEP, added references,
detailed explanations are added, Lualatex file available at
http://insti.physics.sunysb.edu/~siegel/tex.shtm
Ramond-Ramond gauge fields in superspace with manifest T-duality
A superspace with manifest T-duality including Ramond-Ramond gauge fields is
presented. The superspace is defined by the double nondegenerate super-Poincare
algebras where Ramond-Ramond charges are introduced by central extension. This
formalism allows a simple treatment that all the supergravity multiplets are in
a vielbein superfield and all torsions with dimension 1 and less are trivial. A
Green-Schwarz superstring action is also presented where the Wess-Zumino term
is given in a bilinear form of local currents. Equations of motion are
separated into left and right modes in a suitable gauge.Comment: 27 pages, to appear in JHEP. A procedure of the dimensional reduction
is explaine
Superspace with manifest T-duality from type II superstring
A superspace formulation of type II superstring background with manifest
T-duality symmetry is presented. This manifestly T-dual formulation is
constructed in a space spanned by two sets of nondegenerate super-Poincare
algebra. Supertorsion constraints are obtained from consistency of the
kappa-symmetric Virasoro constraints. All superconnections and vielbein fields
are solved in terms of a prepotential which is one of the vielbein components.
AdS5xS5 background is explained in this formulation.Comment: 23 pages; v2: minor modifications, references updated, version
published in JHE
- …