Supergravity and light-like non-commutativity

Alishahiha, Mohsen; Oz, Yaron; Russo, Jorge G.

doi:10.1088/1126-6708/2000/09/002

Cited by 38 publications

(113 citation statements)

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“…This is slightly more complicated than the twist used to obtain the geometry in the spacelike case, and will add a B-field oriented along a lightlike direction. While some of the solutions we are interested in have been obtained previously in the literature [18], re-deriving them in this way will simplify the discussion of generalisations. A nice summary of the solution generating scheme we use and some classifications of solutions can be found in [30].…”

Section: Generating Spacetimes By Null Melvin Twistmentioning

confidence: 99%

Causal structures and holography

Hubeny

Rangamani

Ross

2005

J. High Energy Phys.

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We explore the description of bulk causal structure in a dual field theory. We observe that in the spacetime dual to a spacelike non-commutative field theory, the causal structure in the boundary directions is modified asymptotically. We propose that this modification is described in the dual theory by a modification of the microcausal light cone. Previous studies of this micro-causal light cone for spacelike noncommutativite field theories agree with the expectations from the bulk spacetime. We describe the spacetime dual to field theories with lightlike non-commutativity, and show that they generically have a drastic modification of the light cone in the bulk: the spacetime is non-distinguishing. This means that the spacetime while being devoid of closed timelike or null curves, has causal curves that are "almost closed". We go on to show that the micro-causal light cone in the field theory agrees with this prediction from the bulk.

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Section: Generating Spacetimes By Null Melvin Twistmentioning

confidence: 99%

Causal structures and holography

Hubeny

Rangamani

Ross

2005

J. High Energy Phys.

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“…We will now consider the limit in which this system of (p, q) five branes decouples from the bulk [2,3,5]. In this limit we send l s → 0 and keep…”

Section: The Dual String (Supergravity) Descriptionmentioning

confidence: 99%

“…The supergravity description of these has been recently considered in [5]. Note that for all these backgrounds, for each q-form potential there is also a (6 − q)-form potential.…”

Section: Ns5-branes With Two Electric Rr-fieldsmentioning

confidence: 99%

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Supergravity and “new” six-dimensional gauge theories

Alishahiha¹,

Oz²

2000

Physics Letters B

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In the first part of this letter, we analyse the supergravity dual descriptions of six-dimensional field theories realized on the worldvolume of (p, q) fivebranes (OD5 theory). We show that in order for the low-energy gauge theory description to be valid the θ parameter must be rational. Irrational values of θ require a strongly coupled string description of the system at low-energy. We discuss the phase structure and deduce some properties of these theories. In the second part we construct and study the supergravity description of NS5-branes with two electric RR field, which provides a dual description of six-dimensional theories with several light open D-brane excitations.

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“…Such studies have been done for the case where we have little string theory on R 1,5 [9][10][11][12][13]. The noncommutative deformation of this background and their corresponding Penrose limits have also been studied in [14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%