Tachyon Condensation and Non-BPS D-branes in a Ramond-Ramond Plane Wave Background
| dc.creator | Mukhopadhyay, Partha | |
| dc.date | 2006-11-13 | |
| dc.date | 2008-01-30 | |
| dc.date.accessioned | 2026-07-07T08:57:09Z | |
| dc.date.available | 2026-07-07T08:57:09Z | |
| dc.description | We consider string theory in maximally supersymmetric type IIB plane wave background with constant five form Ramond-Ramond flux (RR plane wave). It is argued that there exists a universal sector of string configurations independent of the null coordinate $x^-$ such that the space-time action evaluated at such a configuration is same in the RR plane wave and flat background. By naturally assuming its validity for the open strings we further argue that the D-branes extending along $x^{\pm}$ are universal in these two backgrounds. Moreover, a universal D-brane which is BPS in flat space must be tachyon-free in RR plane wave and a non-BPS D-brane should have a real tachyon whose potential is universal. Given the above observation we then proceed to describe open string theories for the non-BPS D-branes in RR plane wave. It is suggested that the light-cone Green-Schwarz fermions on the world-sheet satisfy certain bi-local boundary condition similar to that corresponding to flat space. We attempt a canonical quantisation with this boundary condition which gives rise to an open string spectrum similar to that in flat space - containing an R and NS sectors of states. In this process we encounter certain subtleties involving the R sector zero modes. Although the derivation of the R sector zero mode spectrum using the open string theory has not been completely settled, we suggest definite answer by requiring consistency with the relevant space-time interpretation. We finally generalise the above basic features of universality to all the exact pp-wave backgrounds with the same dilaton profile in a given string theory. | |
| dc.description | 39 pages, discussion on NS sector zero point energy problem withdrawn | |
| dc.identifier | https://arxiv.org/abs/hep-th/0611138 | |
| dc.identifier | http://arxiv.org/abs/hep-th/0611138 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/146863 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Tachyon Condensation and Non-BPS D-branes in a Ramond-Ramond Plane Wave Background | |
| dc.type | text |