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- Mikkel Nielsen
- 2000

In this paper, the low-energy effective dynamics of M-theory, eleven-dimensional supergravity, is taken off-shell in a manifestly supersymmetric formulation. We show that a previously proposed… (More)

- Eric Bergshoeff, A. Collinucci, U. Gran, Mikkel Nielsen, Diederik Roest
- 2003

We investigate the accelerating phases of cosmologies supported by a metric, scalars and a single exponential scalar potential. The different solutions can be represented by trajectories on a sphere… (More)

- Andres Collinucci, Mikkel Nielsen, Thomas Van Riet
- 2004

We investigate cosmologies with several scalars and the most general multiexponential potential. We generalise existing literature, formulating these in terms of autonomous systems. This gives rise… (More)

- Eric Bergshoeff, Ulf Gran, Román Linares, Mikkel Nielsen, Tomás Ort́ın, Diederik Roest
- 2003

We perform the generalised dimensional reduction of D = 11 supergravity over three-dimensional group manifolds as classified by Bianchi. Thus, we construct eleven different maximal D = 8 gauged… (More)

We investigate the consequences of generalizing certain well established properties of the open string metric to the conjectured open membrane and open Dpbrane metrics. By imposing deformation… (More)

We consider gauged maximal supergravities with CSO(p, q, r) gauge groups and their relation to the branes of string and M-theory. The gauge groups are characterised by n mass parameters, where n is… (More)

- Ulf Gran, Mikkel Nielsen
- 2001

In this paper we make an SL(2,Z)-covariant generalisation of the noncommutative theories, NCYM and NCOS on the D3-brane, and NCOS and OD1 on the 5-branes in type IIB. These are studied using the… (More)

- Ulf Gran, Mikkel Nielsen, Bengt E. W. Nilsson
- 1999

We consider type IIB (p, q) 5-branes in constant non-zero background tensor potentials, or equivalently, with finite constant field strength on the brane. At linear level, zero-modes are introduced… (More)

- Ulf Gran, Mikkel Nielsen
- 2001

In this paper we show the equivalence of various (non-threshold) bound state solutions of branes, or equivalently branes in background potentials, in tenand eleven-dimensional supergravity. We… (More)

- Martin Cederwall, Ulf Gran, Mikkel Nielsen, Bengt E. W. Nilsson
- 1999

We consider type IIB (p, q) 5-branes in constant non-zero background tensor potentials, or equivalently, with finite constant field strength on the brane. At linear level, zero-modes are introduced… (More)