Strings in strong gravitational fields

Horowitz, Gary T.; Steif, Alan R.

doi:10.1103/physrevd.42.1950

Cited by 183 publications

(165 citation statements)

References 21 publications

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“…A similar exercise in the case of string-string collisions leads, to leading order, to agreement with expectations for quantizing a closed string in an Aichelburg-Sexl metric [48][49][50][51], see also the discussion in [46,47].…”

Section: Tidal Excitation Of the Closed String At Leading Ordermentioning

confidence: 58%

High-energy string-brane scattering: leading eikonal and beyond

D’Appollonio

Vecchia

Russo

et al. 2010

J. High Energ. Phys.

122

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We extend previous techniques for calculations of transplanckian-energy stringstring collisions to the high-energy scattering of massless closed strings from a stack of N Dp-branes in Minkowski spacetime. We show that an effective non-trivial metric emerges from the string scattering amplitudes by comparing them against the semiclassical dynamics of high-energy strings in the extremal p-brane background. By changing the energy, impact parameter and effective open string coupling λ = gN , we are able to explore various interesting regimes and to reproduce classical expectations, including tidal-force excitations, even beyond the leading-eikonal approximation.

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Section: Tidal Excitation Of the Closed String At Leading Ordermentioning

confidence: 58%

High-energy string-brane scattering: leading eikonal and beyond

D’Appollonio

Vecchia

Russo

et al. 2010

J. High Energ. Phys.

122

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“…It does apply, however, if the null Killing vector is covariantly constant [29]. There is no need, in principle, to insist on fixing the standard conformal gauge (1.11).…”

Section: 4mentioning

confidence: 99%

Superstring action inAdS5×S5:
Metsaev
¹
,
Tseytlin
²

2001
Phys. Rev. D
128
1
246
0
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As part of program to quantize superstrings in AdS 5 × S 5 in a light-cone gauge we find the explicit form of the corresponding Green-Schwarz action in the fermionic light-cone κ-symmetry gauge. The resulting action contains terms quadratic and quartic in fermions. In flat space limit it reduces to standard lightcone GS action, while for α ′ → 0 it has correct AdS 5 × S 5 light-cone superparticle limit. We discuss fixing the bosonic light-cone gauge and reformulation of the action in terms of 2-d Dirac spinors. *

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“…The reason could be that, when one writes the action in terms of σ−model coordinates, one observes that the string moving in NW spacetime feels a velocity dependent harmonic oscillator potential in the transverse coordinates [22]. Due to this velocity dependent harmonic oscillator potential, one immediately expects that the spectrum will be quantized, as in the particle case.…”

Section: Introductionmentioning

confidence: 99%

“…They claim that the modular invariance might be attained if one treats them equally, possibly in covariant gauge. Therefore, even though the string light-cone gauge is possible to implement in the NW spacetime according to [22], the presence of the background axion field gives rise to non-equivalent treatment of the string worldsheet coordinates in the light-cone gauge and subsequently causes the partition function not to be modular invariant. Thus it could be concluded that even in the H 4 WZNW model, though implementable, the string light-cone gauge has intrinsic problems and thus can not be assumed as the guide to decide the correct physical spectrum of the quantum string.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of string theory on flat spacetime, it is possible to impose the light-cone gauge and analyze the solution of the string σ−model in that gauge. It is shown by Horowitz and Steif in [22] that in order to be able to impose the string light-cone gauge on a curved background, there should be a covariantly constant null vector on that curved background. This means that the curved background should be a pp-wave spacetime in order to implement the lightcone gauge of string theory.…”

Section: Introductionmentioning

confidence: 99%

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String theory in the Penrose limit ofAdS2×S2spacetime

Deliduman

Kaynak

2005

Phys. Rev. D

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The string theory in the Penrose limit of AdS 2 ×S 2 is investigated. The specific Penrose limit is the background known as the Nappi-Witten spacetime, which is a plane-wave background with an axion field. The string theory on it is given as the Wess-Zumino-Novikov-Witten (WZNW) model on non-semi-simple group H 4 . It is found that, in the past literature, an important type of irreducible representations of the corresponding algebra, h 4 , were missed. We present this "new" representations, which have the type of continuous series representations. All the three types of representations of the previous literature can be obtained from the "new" representations by setting the momenta in the theory to special values. Then we realized the affine currents of the WZNW model in terms of four bosonic free fields and constructed the spectrum of the theory by acting the negative frequency modes of free fields on the ground level states in the h 4 continuous series representation. The spectrum is shown to be free of ghosts, after the Virasoro constraints are satisfied. In particular we argued that there is no need for constraining one of the longitudinal momenta to have unitarity. The tachyon vertex operator, that correspond to a particular state in the ground level of the string spectrum, is constructed. The operator products of the vertex operator with the currents and the energy-momentum tensor are shown to have the correct forms, with the correct conformal weight of the vertex operator.

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Strings in strong gravitational fields

Cited by 183 publications

References 21 publications

High-energy string-brane scattering: leading eikonal and beyond

High-energy string-brane scattering: leading eikonal and beyond

Superstring action inAdS5×S5:
Metsaev
¹
,
Tseytlin
²

2001
Phys. Rev. D
128
1
246
0
View full text Add to dashboard Cite

String theory in the Penrose limit ofAdS2×S2spacetime

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Strings in strong gravitational fields

Cited by 183 publications

References 21 publications

High-energy string-brane scattering: leading eikonal and beyond

High-energy string-brane scattering: leading eikonal and beyond

Superstring action inAdS5×S5:Metsaev1, Tseytlin2 2001Phys. Rev. D12812460View full textAdd to dashboardCite

String theory in the Penrose limit ofAdS2×S2spacetime

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About

Superstring action inAdS5×S5:
Metsaev
¹
,
Tseytlin
²

2001
Phys. Rev. D
128
1
246
0
View full text Add to dashboard Cite