Results 1  10
of
69
More comments on superstring interactions in the ppwave background”, JHEP 0209
, 2002
"... We reconsider lightcone superstring field theory on the maximally supersymmetric ppwave background. We find that the results for the fermionic Neumann matrices given so far in the literature are incorrect and verify our expressions by relating them to the bosonic Neumann matrices and proving sever ..."
Abstract

Cited by 51 (4 self)
 Add to MetaCart
(Show Context)
We reconsider lightcone superstring field theory on the maximally supersymmetric ppwave background. We find that the results for the fermionic Neumann matrices given so far in the literature are incorrect and verify our expressions by relating them to the bosonic Neumann matrices and proving several nontrivial consistency conditions among them, as for example the generalization of a flat space factorization theorem for the bosonic Neumann matrices. We also study the bosonic and fermionic constituents of the prefactor and point out a subtlety in the relation between continuum and oscillator As is well known by now, besides flat space and AdS5 × S 5 type IIB superstring theory admits an additional solution preserving all 32 supersymmetries, the so called maximally supersymmetric ppwave background [1]. In contrast to flat space and AdS5 × S 5 which are related being the asymptotic and nearhorizon geometry of the D3brane respectively, the maximally supersymmetric ppwave solution
Maximally supersymmetric solutions of ten and elevendimensional supergravities
, 2002
"... We classify (up to local isometry) the maximally supersymmetric solutions of the eleven and tendimensional supergravity theories. We find that the AdS solutions, the Hppwaves and the flat space solutions exhaust them. ..."
Abstract

Cited by 43 (8 self)
 Add to MetaCart
We classify (up to local isometry) the maximally supersymmetric solutions of the eleven and tendimensional supergravity theories. We find that the AdS solutions, the Hppwaves and the flat space solutions exhaust them.
The Dinstanton and other supersymmetric Dbranes in IIB planewave string theory,” Ann
 JHEP
"... hepth/0211122 ..."
(Show Context)
Open strings in the plane wave background. I: Quantization and symmetries,” Nucl. Phys. B665
, 2003
"... We systematically investigate open strings in the plane wave background of type IIB string theory. We carefully analyze possible boundary conditions for open strings and find static as well as timedependent branes. The branes fall into equivalence classes depending on whether they are related by th ..."
Abstract

Cited by 38 (3 self)
 Add to MetaCart
(Show Context)
We systematically investigate open strings in the plane wave background of type IIB string theory. We carefully analyze possible boundary conditions for open strings and find static as well as timedependent branes. The branes fall into equivalence classes depending on whether they are related by the action of target space isometries. In particular static branes localized at the origin of transverse space and certain timedependent branes fall into the same equivalence class. We analyze thoroughly the symmetries of all branes we discuss. Apart from symmetries descending from target space isometries, the worldsheet action being free admits a countably infinite number of other global worldsheet symmetries. We find that one can use such worldsheet symmetries to restore seemingly broken target space symmetries. In particular, we show that Dbranes localized at arbitrary constant positions which were thought to be 1/4 supersymmetric in fact have sixteen supercharges whilst Dbranes which were thought to be nonsupersymmetric have eight supercharges. We discuss in detail the quantization in all cases. Contents
Plane waves: To infinity and beyond
"... Abstract: We describe the asymptotic boundary of the general homogeneous plane wave spacetime, using a construction of the ‘points at infinity ’ from the causal structure of the spacetime as introduced by Geroch, Kronheimer and Penrose. We show that this construction agrees with the conformal bounda ..."
Abstract

Cited by 34 (5 self)
 Add to MetaCart
(Show Context)
Abstract: We describe the asymptotic boundary of the general homogeneous plane wave spacetime, using a construction of the ‘points at infinity ’ from the causal structure of the spacetime as introduced by Geroch, Kronheimer and Penrose. We show that this construction agrees with the conformal boundary obtained by Berenstein and Nastase for the maximally supersymmetric tendimensional plane wave. We see in detail how the possibility to go beyond (or around) infinity arises from the structure of light cones. We also discuss the extension of the construction to timedependent plane wave solutions, focusing on the examples obtained from the Penrose limit of Dpbranes. Keywords: Plane Waves, PPwaves, causal structure, conformal boundary.
Homogeneous Plane Waves
, 2002
"... Motivated by the search for potentially exactly solvable timedependent string backgrounds, we determine all homogeneous plane wave (HPW) metrics in any dimension and find one family of HPWs with geodesically complete metrics and another with metrics with null singularities. The former generalises b ..."
Abstract

Cited by 21 (1 self)
 Add to MetaCart
Motivated by the search for potentially exactly solvable timedependent string backgrounds, we determine all homogeneous plane wave (HPW) metrics in any dimension and find one family of HPWs with geodesically complete metrics and another with metrics with null singularities. The former generalises both the CahenWallach (constant Aij) metrics to timedependent HPWs, Aij(t), and the OzsvathSchücking antiMach metric to arbitrary dimensions. The latter is a generalisation of the known homogeneous metrics with Aij ∼ 1/t2 to a more complicated timedependence. We display these metrics in various coordinate systems, show how to embed them into string theory, and determine the isometry algebra of a general HPW and the associated conserved charges. We review the LewisRiesenfeld theory of invariants of timedependent harmonic oscillators and show how it can be deduced from the geometry of plane waves. We advocate the use of the invariant associated with the extra (timelike) isometry of HPWs for lightcone quantisation, and illustrate the procedure in some examples.
Causal inheritance in plane wave quotients
, 2003
"... We investigate the appearance of closed timelike curves in quotients of plane waves along spacelike isometries. First we formulate a necessary and sufficient condition for a quotient of a general spacetime to preserve stable causality. We explicitly show that the plane waves are stably causal; in pa ..."
Abstract

Cited by 20 (3 self)
 Add to MetaCart
We investigate the appearance of closed timelike curves in quotients of plane waves along spacelike isometries. First we formulate a necessary and sufficient condition for a quotient of a general spacetime to preserve stable causality. We explicitly show that the plane waves are stably causal; in passing, we observe that some ppwaves are not even distinguishing. We then consider the classification of all quotients of the maximally supersymmetric tendimensional plane wave under a spacelike isometry, and show that the quotient will lead to closed timelike curves iff the isometry involves a translation along the u direction. The appearance of these closed timelike curves is thus connected to the special properties of the light cones in plane wave spacetimes. We show that all other quotients preserve stable causality.