query: Misconceptions about the Klein-Gordon and Dirac equations and their problems
positive_passages.docid: 150985
positive_passages.text: Why can't the Klein-Gordon equation explain the hydrogen atom but the Dirac equation does?
negative_passages.docid: 88658
negative_passages.text: Confusion regarding the principle of least action in Landau & Lifshitz "The Classical Theory of Fields"
negative_passages.docid: 70774
negative_passages.text: Why can't the Schrödinger equation be solved exactly for multi-electron atoms? Does some solution exist even in principle?
negative_passages.docid: 26125
negative_passages.text: Does the canonical commutation relation fix the form of the momentum operator?
negative_passages.docid: 80259
negative_passages.text: Trouble understanding the Bohr model of the atom
negative_passages.docid: 34350
negative_passages.text: matter wave and wave function
negative_passages.docid: 131016
negative_passages.text: Question about Klein-Gordon field Lagrangian
negative_passages.docid: 80342
negative_passages.text: Plane waves solutions for Dirac equation in terms of eigenstates of helicity
negative_passages.docid: 32932
negative_passages.text: What are the mathematical problems in introducing Spin 3/2 fermions?
negative_passages.docid: 51644
negative_passages.text: Differential Equations for Physicists
negative_passages.docid: 74065
negative_passages.text: Proof of de Broglie wavelength for electron
negative_passages.docid: 143668
negative_passages.text: Theoretical reasons for charge quantization
negative_passages.docid: 146926
negative_passages.text: Why don't products of Dirac deltas integrate correctly?
negative_passages.docid: 41407
negative_passages.text: How to derive or justify the expressions of momentum operator and energy operator?
negative_passages.docid: 49348
negative_passages.text: S. Weinberg, “The Quantum theory of fields: Foundations” (1995), Eq. (9.2.15)
negative_passages.docid: 57961
negative_passages.text: Some doubts about photons
negative_passages.docid: 61603
negative_passages.text: Why is the Yang–Mills existence and mass gap problem so fundamental?