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Category: Quantum Mechanics

Insightful posts related to Quantum Mechanics. You will find here solutions to problems, derivations, explanations etc.

Hellmann-Feynman Theorem YouTube tutorial

Quantum MechanicsJul 28, 2018 Manas Sharma

Manas SharmaPh.D. researcher at Friedrich-Schiller University Jena, Germany. I’m a physicist specializing in computational material science. I write efficient codes for simulating light-matter…

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Hydrogen – Relativistic Correction

Quantum MechanicsJun 5, 2017Jun 9, 2017 Manas Sharma

In this post, I will use the stationary(time-independent) first order perturbation theory, to find out the relativistic correction to the Energy of the…

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Harmonic Oscillator – Relativistic Correction

Quantum MechanicsJun 4, 2017Jun 9, 2017 Manas Sharma

In this post, I will use the stationary(time-independent) first order perturbation theory, to find out the relativistic correction to the Energy of the…

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Hellman-Feynman Theorem and its Applications – Quantum Mechanics

Quantum MechanicsApr 23, 2017Jul 28, 2018 Manas Sharma

Hellman-Feynman Theorem investigates how the energy of a system varies as the Hamiltonian varies. If a system is characterised by a Hamiltonian that…

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Expectation Value of 1/r for Hydrogen using Virial Theorem -Quantum Mechanics

Quantum MechanicsApr 22, 2017Apr 23, 2017 Manas Sharma

In this post we will be evaluating the expectation value of 1/r : using the Virial Theorem, that we proved and talked about…

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