1.

Closed string symmetries in open string field theory: tachyon vacuum as sinesquare deformation
/ Kishimoto, Isao ; Kitade, Tomomi ; Takahashi, Tomohiko
We revisit the identitybased solutions for tachyon condensation in open bosonic string field theory (SFT) from the viewpoint of the sinesquare deformation (SSD). [...]
Published in PTEP 2018 (2018) 123B04
10.1093/ptep/pty125
arXiv:1809.01885
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2.

Vector profile and gauge invariant observables of string field theory solutions for constant magnetic field background
/ Ishibashi, Nobuyuki ; Kishimoto, Isao ; Masuda, Toru ; Takahashi, Tomohiko
We study profiles and gauge invariant observables of classical solutions corresponding to a constant magnetic field on a torus in open string field theory. [...]
Published in JHEP 1805 (2018) 144
10.1007/JHEP05(2018)144
arXiv:1804.01284
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3.

String field theory solution corresponding to constant background magnetic field
/ Ishibashi, Nobuyuki ; Kishimoto, Isao ; Takahashi, Tomohiko
Following the method recently proposed by Erler and Maccaferri, we construct solutions to the equation of motion of Witten's cubic string field theory, which describe a constant magnetic field background. [...]
Published in PTEP 2017 (2017) 013B06
10.1093/ptep/ptw185
arXiv:1610.05911
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4.

Open string fields as matrices
/ Kishimoto, Isao ; Masuda, Toru ; Takahashi, Tomohiko ; Takemoto, Shoko
We show that the action expanded around Erlerâ€“Maccaferri's Dbrane solution describes the Dbrane system where one Dbrane disappears due to tachyon condensation. [...]
Published in PTEP 2015 (2015) 033B05
10.1093/ptep/ptv023
arXiv:1412.4855
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5.

Observables for identitybased tachyon vacuum solutions
/ Kishimoto, Isao ; Masuda, Toru ; Takahashi, Tomohiko
We consider a modified algebra in bosonic open string field theory expanded around identitybased scalar solutions. [...]
Published in PTEP 2014 (2014) 103B02
10.1093/ptep/ptu136
arXiv:1408.6318
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6.

Comments on observables for identitybased marginal solutions in Berkovitsâ€™ superstring field theory
/ Isao Kishimoto ; Tomohiko Takahashi
We construct an analytic solution for tachyon condensation around identitybased marginal solutions in Berkovitsâ€™ WZWlike open superstring field theory. [...]
Published in JHEP 1407 (2014) 031
10.1007/JHEP07(2014)031
arXiv:1404.4427
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