Tachyon condensation and Vacuum SuperString Field Theory

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(Cubic SSFT)
(Lecture II)
II SUMMER SCHOOL INMODERN
MATHEMATICAL PHYSICS September 1-12,
2002Kopaonik, (SERBIA) YUGOSLAVIA
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OUTLOOK
SuperString Field Theory

• Cubic SSFT action

2-nd

• Tachyon Condensation in SSFT

• Rolling Tachyon

1-st

• Vacuum SuperString Field Theory

3-d
i) New BRST charge ii) Special solutions -
sliver, lump, etc. algebraic surface
states Moyal representation
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Super String Theory (NSR-formalism)
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Super String Theory (NSR-formalism)
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(No Transcript)
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Super String Theory (NSR-formalism)
r1/2 for R-sector r0 for NS-sector
Quantization
Correlators
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Identity Overlap
Gross, Jevicki
Three string vertex overlap
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Fermionic Vertices
Identity
Three string vertex
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Superstring (NSR-formalism) ghosts
r1/2 for R-sector r0 for NS-sector
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Cubic Super String Field Theory
E.Witten (1986)
Went,.
PROBLEMS
E.O.M.
I.A., Medvedev, Zubarev (1990) Preitschopf,
Thorn, Yost (1990)
Up to a kernal
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String Field Theory on a non-BPS brane

• I.A.,Belov,Koshelev,Medvedev(2001)

Parity GSO
odd
even -
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Tachyon Condensation in SFT

• Bosonic String - Tachyon

• Super String has no Tachyon

• Tachyon in GSO ( - ) sector of NS string

Kostelecky,Samuel (1989)

• Level truncation

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Vertex operators in pictures 1 and 0
Berkovits,Sen,Zwiebach (2000)
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Tachyon Condensation in SSFT
For the non-polinomial Berkovic action
(Berkovic, Sen, Zwiebach) 85,
90.5
97.5
105
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FAQ cubic unbounded
A. Auxiliary fields
u, t fields
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NO OPEN STRING EXCITATIONS
VSFT