albert einstein arnold sommerfeld atomic orbital boson bra-ket notation cartesian classical mechanics complex number consistent histories copenhagen interpretation david bohm david john candlin dirac delta function dirac equation double-slit experiment ehrenfest theorem elitzur-vaidman bomb-tester ensemble interpretation eugene wigner fermion heisenberg picture helium hidden variable theory hilbert space hugh everett iii hydrogen hydrogen atom interaction picture interference interpretation of quantum mechanics john stewart bell john von neumann louis de broglie many-worlds interpretation matrix mechanics max born max planck measurement in quantum mechanics momentum space niels bohr normalisable wave function old quantum theory orthonormal basis particle in a box pascual jordan path integral formulation paul dirac pauli equation pauli exclusion principle probability amplitude probability distribution quantum decoherence quantum entanglement quantum field theory quantum gravity quantum logic quantum mechanics quantum state quantum superposition quantum tunnelling real line real number relational quantum mechanics richard feynman rotation satyendra nath bose theory of everything transactional interpretation uncertainty principle vector space wave function collapse wave packet werner heisenberg wilhelm wien wolfgang pauli