Tachyon Condensation in SFT

1
Tachyon Condensation in SFT

• Bosonic String - Tachyon

• Sen's Conjectures (1999)

• Brane Tension Vacuum Energy

• Tachyon Condensation in SFT

• Tachyon in GSO ( - )

• Level truncation

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Tachyon Condensation in SSFT
3
Vertex operators in pictures 1 and 0
E.Witten,(1986)
I.A,, Medvedev, Zubarev (1990) Preitschopf,
Thorn, Yost, (1990)
Berkovits(1995)
N.B.,Sen,Zviebach(2000)
I.A, Belov, Koshelev, P.M. (2001)
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Vacuum String Field Theory on a non-BPS brane

• I.A., Belov, Giryavets

VSSFT
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Structure of new Q
solution of E.O.M
SFT in the background field
,
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E.O.M.
Analog of Noncommutative Soliton in Strong
Coupling Limit
Gopakumar, Minwalla,Strominger
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Sliver
I.A., Belov, Giryavets Marino, Schiappa
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Special Solutions
(the ABC in pictures)

• Sliver

• Butterfly

• Lump