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Results tagged with quantum-mechanics
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user 65510
Quantum mechanics describes the microscopic properties of nature in a regime where classical mechanics no longer applies. It explains phenomena such as the wave-particle duality, quantization of energy, and the uncertainty principle and is generally used in single-body systems. Use the quantum-field-theory tag for the theory of many-body quantum-mechanical systems.
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Deriving Nakajima–Zwanzig
I would like help on one step of the derivation of the Nakajima–Zwanzig equations. Specifically given the below equations:
$${\partial_t}\left( \begin{matrix}
\mathcal{P} \\
\mathcal{Q} \\
\en …
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Why energy expectation values (Energy) are functions of coefficients of corresponding trial ...
I don't think I have a physical interpretation. But I like to think about it as a two-step process:
i. Showing that the expectation value of the energy for the ground state wavefunction is the lowest …