1. (Cubic SSFT) Super String Field Theory (Lecture II) I.Ya. Aref'eva
Steklov Mathematical Institute
Super
String Field Theory
(Cubic SSFT)
(Lecture II)
II SUMMER SCHOOL IN MODERN MATHEMATICAL PHYSICS September 1-12, Kopaonik, (SERBIA) YUGOSLAVIA

2. Tachyon Condensation in SSFT
OUTLOOK
String Field Theory
L.Bonora
SuperString Field Theory
Cubic SSFT action
2-nd
Tachyon Condensation in SSFT
1-st
Rolling Tachyon
Vacuum SuperString Field Theory
3-d
i) New BRST charge
ii) Special solutions - sliver, lump, etc.:
algebraic; surface states; Moyal representation

3. Super String Theory (NSR-formalism)
2dim Majorana spinor,

4. Super String Theory (NSR-formalism)

6. Super String Theory (NSR-formalism)
r=1/2 for R-sector;
r=0 for NS-sector
Quantization
Correlators

7. Identity Overlap
Gross, Jevicki
Three string vertex overlap

8. Fermionic Vertices
Identity
Three string vertex

9. Superstring (NSR-formalism); ghosts
r=1/2 for R-sector;
r=0 for NS-sector
Quantization
Bosonization

10. 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

11. String Field Theory on a non-BPS brane
I.A.,Belov,Koshelev,Medvedev(2001)
Parity
GSO
odd +
even -

12. Tachyon Condensation in SFT
Bosonic String - Tachyon
Super String has no Tachyon
Tachyon in GSO ( - ) sector of NS string
Kostelecky,Samuel (1989) V
Level truncation

13. Vertex operators in pictures –1 and 0+ 2 s -
3/2 r 1 t
1/2 u
Picture 0
Picture -1
Name
GSO
Level
Berkovits,Sen,Zwiebach (2000)
I.A.,Belov,Koshelev,Medvedev
(2001)

14. Tachyon Condensation in SSFT
97.5%
For the non-polinomial
Berkovic action (Berkovic,
Sen, Zwiebach): %, %
105%

15. FAQ: cubic unbounded
A.: Auxiliary fields
u, t fields

16. NO OPEN STRING EXCITATIONS
VSFT