Williamson theorem in classical, quantum, and statistical physics

• URL: http://arxiv.org/abs/2106.11965v2
• Date: Mon, 22 Nov 2021 14:06:37 GMT
• Title: Williamson theorem in classical, quantum, and statistical physics
• Authors: F. Nicacio
• Abstract summary: We show that applying the Williamson theorem reveals the normal-mode coordinates and frequencies of the system in the Hamiltonian scenario. A more advanced topic concerning uncertainty relations is developed to show once more its utility in a distinct and modern perspective.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this work we present (and encourage the use of) the Williamson theorem and its consequences in several contexts in physics. We demonstrate this theorem using only basic concepts of linear algebra and symplectic matrices. As an immediate application in the context of small oscillations, we show that applying this theorem reveals the normal-mode coordinates and frequencies of the system in the Hamiltonian scenario. A modest introduction of the symplectic formalism in quantum mechanics is presented, useing the theorem to study quantum normal modes and canonical distributions of thermodynamically stable systems described by quadratic Hamiltonians. As a last example, a more advanced topic concerning uncertainty relations is developed to show once more its utility in a distinct and modern perspective.

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