Pulsating strings in Lunin-Maldacena backgrounds

We consider pulsating strings in Lunin-Maldacena backgrounds, specifically in deformed Minkowski spacetime and deformed AdS(5) x S(5). We find the relation between the energy and the oscillation number of the pulsating string when the deformation is small. Since the oscillation number is an adiabatic invariant it can be used to explore the regime of highly excited string states. We then quantize the string and look for such a sector. For the deformed Minkowski background we find a precise match with the classical results if the oscillation number is quantized as an even number. For the deformed AdS(5) x S(5) we find a contribution which depends on the deformation parameter.

Capes

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

CNPq[304116/2010-6]

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

FAPESP[2008/05343-5]

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)