Course by A. S. Schwarz "Quantum mechanics and quantum field theory. Algebraic and geometric approaches" February 7–May 3, 2022, online
I am planning to consider some basic notions of quantum mechanics, quantum field theory and quantum statistical physics. In particular, I will discuss the notions of decoherence, of particle and quasiparticle, of scattering matrix and inclusive scattering matrix. The course is based on algebraic and geometric approaches to quantum theory. (The standard approach when states are represented by vectors in Hilbert space is not appropriate for systems with an infinite number of degrees of freedom.) In algebraic approach the starting point is an associative algebra with involution, self-adjoint elements of this algebra are identified with observables, the states are represented by positive linear functional on the algebra. (Quasi)particles are defined as elementary excitations of translation-invariant states. Scattering matrix of elementary excitations can be expressed in terms of Green functions (LSZ formula). Inclusive scattering matrix can be expressed in terms of generalized Green functions that appear in Keldysh formalism of non-equilibrium statistical physics. Geometric approach suggested in my papers starts with a convex set interpreted as a set of states. This approach also allows us to define elementary excitations and to develop scattering theory. It can be used to show that any theory can be obtained from classical mechanics if we can measure only a part of classical observables.
Please, address Daniil Rafikov, rafikov@mi-ras.ru, for Zoom data.
Financial support. The course is supported by the Ministry of Science and Higher Education of the Russian Federation (the grant to the Steklov International Mathematical Center, Agreement no. 075-15-2022-265).
Transcript of lectures
Lecturer
Schwarz Albert S
Institutions
Steklov Mathematical Institute of Russian Academy of Sciences, Moscow Steklov International Mathematical Center |
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Course by A. S. Schwarz "Quantum mechanics and quantum field theory. Algebraic and geometric approaches", February 7–May 3, 2022 |
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May 3, 2022 (Tue) |
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Lecture 13. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz May 3, 2022 20:05, online
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April 26, 2022 (Tue) |
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Lecture 12. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz April 26, 2022 20:05, online
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April 19, 2022 (Tue) |
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Lecture 11. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz April 19, 2022 20:05, online
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April 12, 2022 (Tue) |
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Lecture 10. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz April 12, 2022 20:05, online
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April 5, 2022 (Tue) |
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Lecture 9. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz April 5, 2022 20:05, online
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March 29, 2022 (Tue) |
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Lecture 8. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz March 29, 2022 20:05, online
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March 22, 2022 (Tue) |
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Lecture 7. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz March 22, 2022 20:05, online
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March 15, 2022 (Tue) |
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Lecture 6. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz March 15, 2022 20:05, online
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March 8, 2022 (Tue) |
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Lecture 5. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz March 8, 2022 20:05, online
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February 28, 2022 (Mon) |
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Lecture 4. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz February 28, 2022 20:00, online
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February 21, 2022 (Mon) |
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Lecture 3. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz February 21, 2022 20:00, online
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February 14, 2022 (Mon) |
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Lecture 2. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz February 14, 2022 20:00, online
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February 7, 2022 (Mon) |
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Lecture 1. Quantum mechanics and quantum field theory. Algebraic and geometric approaches A. S. Schwarz February 7, 2022 20:00, online
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