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About
President
Governance
Partner Institutions
Visit
People
Management
Faculty
Postdocs
Visiting Scholars
Administration
Academic Support
Research
Research Groups
Courses
Seminars
Join Us
Faculty
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Life @ BIMSA
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Transportation
Facilities
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News
News
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Qiuzhen College, Tsinghua University
Yau Mathematical Sciences Center, Tsinghua University (YMSC)
Tsinghua Sanya International  Mathematics Forum (TSIMF)
Shanghai Institute for Mathematics and  Interdisciplinary Sciences (SIMIS)
Hetao Institute of Mathematics and Interdisciplinary Sciences
BIMSA > Local quantum field theory and string theory in BRST formalism
Local quantum field theory and string theory in BRST formalism
1, Quantization
This part is devoted to the rigorous quantization of symplectic vector spaces and Lagrangian subspaces of these spaces. To quantize, we should fix Darboux coordinates; the result does not depend on this choice (up to a constant factor). In the formalism of L-functionals, it is not necessary to fix Darboux coordinates. These ideas can be used to quantize quadratic action functionals, in particular, the Dirichlet functional, and to develop a simplified version of operator formalism in CFT.

2. Introduction to homological algebra and derived geometry. Applications to physics
Differential graded algebras. Homology. Euler characteristic and Lefschetz Trace formula. Quasi-isomorphism. BRST quantization. Projective modules and projective resolution. Koszul-Tate resolution. Cohomology of Lie algebras.

Supermanifolds. Q-manifolds and QP-manifolds. Derived geometry.
BV formalism.

3. Local field theories.
Sewing of two domains. Axiomatics of conformal theory. BV formalism and BFV formalism. Cattaneo-Mnev-Reshetikhin theory.

4. New approach to string theory and superstring theory [4],[5]
A classical theory with first-class constraints can be quantized in terms of the BRST formalism. One can describe a broad class of physical quantities for quantum theory and show that multiloop amplitudes of string theory are among these quantities.
Lecturer
Albert Schwarz
Date
17th March ~ 26th May, 2026
Location
Weekday Time Venue Online ID Password
Tuesday 10:40 - 12:15 A3-2-303 ZOOM 11 435 529 7909 BIMSA
Reference
1. Schwarz, Albert. Quantum mechanics and quantum field theory from algebraic and geometric viewpoints ( Springer, 2024)
2.Schwarz, Albert. "Quantum theory from classical mechanics near equilibrium." Letters in Mathematical Physics 115, no. 3 (2025): 76.
3.Schwarz, Albert. "Adiabatic definitions of scattering matrix and inclusive scattering matrix." arXiv preprint arXiv:2412.10634 (2024).
4. Schwarz, Albert. "A new approach to string theory." Universe 9, no. 10 (2023): 451.
5. Schwarz, Albert. "A new approach to superstring." Journal of High Energy Physics 2025, no. 4 (2025): 1-19.
Video Public
Yes
Notes Public
Yes
Language
English
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