Final answer:
In physics, the operator is known as the Hermitian Hamiltonian operator, representing the total energy of a system.
Explanation:
The operator is called Hamiltonian operator. The Hamiltonian operator is a type of operator in quantum mechanics that represents the total energy of a system. It is a Hermitian operator, meaning that when it operates on a function, it satisfies a specific condition related to its adjoint operation. In quantum mechanics, it is postulated that all operators representing dynamical variables are Hermitian.
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