Marginal Deformations and Closed String Couplings in Open String Field Theory

Katsumata, Fumie; Takahashi, Tomohiko; Zeze, Syoji

doi:10.1088/1126-6708/2004/11/050

Cited by 18 publications

(26 citation statements)

References 23 publications

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“…Therefore, the phase factor eÎ (k 9 ) 1 , which is induced by a current J = i √ 2α ′ ∂X 9 , is exactly the same as that in (D.9) obtained by a different method. It corresponds to the phase factor appeared in [2,7] in the case of bosonic SFT.…”

Section: Tachyon Vacuum Solutionmentioning

confidence: 95%

“…But the expression of the gauge invariant overlap is deformed appropriately. In particular, for a closed tachyon vertex, a phase factor appears and it is the same value as that evaluated in [7] using a different method.…”

Section: Introductionmentioning

confidence: 92%

“…In appendices B and C, we will show technical details. In appendix D, we will discuss the gauge invariant overlap with a closed tachyon vertex and a field redefinition induced by the identity-based marginal solution as in [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On nontrivial solutions around a marginal solution in cubic superstring field theory

Inatomi

Kishimoto

Takahashi

2012

J. High Energ. Phys.

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We construct tachyon vacuum and half-brane solutions, using an extension of KBc algebra, in the theory around a type of identity-based marginal solutions in modified cubic superstring field theory. With explicit computations, we find that their vacuum energies are the same as those of corresponding solutions around the original theory. It implies that the vacuum energy for the identity-based marginal solution vanishes although straightforward computation of it is subtle. We also evaluate the gauge invariant overlaps for those nontrivial solutions. The values for them are deformed according to the marginal solution in the same way as the case of bosonic string field theory.

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Section: Tachyon Vacuum Solutionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 92%

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On nontrivial solutions around a marginal solution in cubic superstring field theory

Inatomi

Kishimoto

Takahashi

2012

J. High Energ. Phys.

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“…does not respect this property. Indeed, although the TT-solution based on f TT is finite in the Fock space, a finite L − reparametrization of it, (2.31), appears to be singular 18 . In particular…”

Section: B a New Singularity Towards The Identitymentioning

confidence: 99%

A simple solution for marginal deformations in open string field theory

Maccaferri

2014

J. High Energ. Phys.

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We derive a new open string field theory solution for boundary marginal deformations generated by chiral currents with singular self-OPE. The solution is algebraically identical to the Kiermaier-Okawa-Soler solution and it is gauge equivalent to the TakahashiTanimoto identity-based solution. It is wedge-based and we can analytically evaluate the Ellwood invariant and the action, reproducing the expected results from BCFT. By studying the isomorphism between the states of the initial and final background a dual derivation of the Ellwood invariant is also obtained.

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“…The result for the overlap is identical to the effect of a coupling between an on-shell closed string state and a general open string field. 4) Consequently, the analytic solutions can be regarded as the tachyon vacuum solution in marginally deformed backgrounds. This result implies that in the original theory the vacuum energy of the identity-based solutions is zero, although the direct calculation gives indefinite results.…”

Section: §1 Introductionmentioning

confidence: 99%

Tachyon vacuum of bosonic open string field theory in marginally deformed backgrounds

Inatomi

Kishimoto

Takahashi

2013

Progress of Theoretical and Experimental Physics

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We consider bosonic open string field theory in marginally deformed backgrounds, which is obtained by expanding the string field around the identity-based solutions associated with marginal deformations. We find a new set of string fields which satisfies the KBc algebra, but the nilpotent kinetic operator is that of the theory expanded around the identity-based marginal solution. By use of these string fields, we construct the tachyon vaccum solution in marginally deformed backgrounds. The vacuum energy density is equivalent to that of the tachyon vacuum without marginal deformations.The gauge invariant overlap is changed according to the effect of marginal deformations, as expected from known results in CFT. These results suggest that the vacuum energy is zero for the identity-based marginal solutions in the original theory.1 typeset using P T P T E X.cls Ver.0.9

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Marginal Deformations and Closed String Couplings in Open String Field Theory

Cited by 18 publications

References 23 publications

On nontrivial solutions around a marginal solution in cubic superstring field theory

On nontrivial solutions around a marginal solution in cubic superstring field theory

A simple solution for marginal deformations in open string field theory

Tachyon vacuum of bosonic open string field theory in marginally deformed backgrounds

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