Hamiltonian (quantum Mechanics)
In quantum mechanics, the Hamiltonian is the operator corresponding to the total energy of the system. It is usually denoted by H, also Ȟ or Ĥ. Its spectrum is the set of possible outcomes when one measures the total energy of a system. Because of its close relation to the time-evolution of a system, it is of fundamental importance in most formulations of quantum theory.
Read more about Hamiltonian (quantum Mechanics): Introduction, Schrödinger Equation, Dirac Formalism, Expressions For The Hamiltonian, Energy Eigenket Degeneracy, Symmetry, and Conservation Laws, Hamilton's Equations