Lecture
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14 Gen 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
1. Introduction. Why string theory? Field-theory amplitudes and UV divergences. A refresher on the Gamma function and its properties. The Veneziano amplitude.
21 Gen 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
2. Classical strings. From a point particle to the bosonic string. The Nambu-Goto action. The Polyakov action and its symmetries. The classical Virasoro constraints. 3. Quantum strings. Old-covariant quantisation. The Fock space of string states. The level-by-level construction of the string spectrum in the old-covariant way. Null states. Weinberg states.
28 Gen 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
4. The level-by-level construction of the string spectrum in the light-cone. Conformal field theory basics. The worldsheet CFT. Vertex operators. The Del Giudice, Di Vecchia, Fubini (DDF) method for the construction of the spectrum.
18 Feb 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
5. Regge trajectories. A refresher on Young diagrams and polarisations. Howe duality basics. An efficient and covariant technology for the construction of entire subleading Regge trajectories.
25 Feb 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
6. More on the worldsheet CFT. The ghost CFT. The rudiments of the computation of tree-level string scattering amplitudes. The method of the generating functional.
04 Mar 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
7. The tree-level 3-gluon amplitude using Wick's theorem and Yang-Mills from a low-energy string. The generating functional for the leading Regge trajectory and the leading Regge-tachyon-tachyon amplitude. 8. The calculation of the tree-level 4-tachyon (open string) amplitude: the Veneziano amplitude. Bulk and boundary CFTs. The Virasoro-Shapiro amplitude.
11 Mar 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
9. The Kawai-Lewellen-Tye relations between closed and open string amplitudes and their proof. The tree-level 3-graviton amplitude and General Relativity from a low-energy string. The double copy.
18 Mar 2026 (2h 00m)
CHRYSOULA Markou - Corso (attività didattica) - In presenza
10. The Ramond-Neveu-Schwarz superstring. The level-by-level construction of the superstring spectrum. An efficient and covariant technology for the construction of entire subleading Regge trajectories of the superstring.
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