Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A no-ghost theorem for the bosonic Nappi-Witten string
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering.
Show others and affiliations
2009 (English)In: Physical Review D, ISSN 1550-7998, Vol. 80, no 8, 1-10 p.Article in journal (Refereed)
Abstract

We prove a no-ghost theorem for a bosonic string propagating in Nappi-Witten spacetime. This is achieved in two steps. We first demonstrate unitarity for a class of NW/U(1) modules: the norm of any state which is primary with respect to a chosen timelike U(1) is non-negative. We then show that physical states - states satisfying the Virasoro constraints - in a class of modules of an affinisation of the Nappi-Witten algebra are contained in the NW/U(1) modules. Similar to the case of strings on $AdS_3$, in order to saturate the spectrum obtained in light-cone quantization we are led to include modules with energy not bounded from below, which are related to modules with energy bounded from below by spectral flow automorphisms

Place, publisher, year, edition, pages
2009. Vol. 80, no 8, 1-10 p.
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-9851OAI: oai:DiVA.org:kau-9851DiVA: diva2:493358
Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2013-06-12Bibliographically approved

Open Access in DiVA

No full text

Other links

http://dx.doi.org/10.1103/PhysRevD.80.086003http://arxiv.org/abs/0907.5366

Authority records BETA

Fjelstad, Jens

Search in DiVA

By author/editor
Fjelstad, Jens
By organisation
Department of Physics and Electrical Engineering
In the same journal
Physical Review D
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 38 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf