Posted:

**Oct 06, 2011 8:59 pm**hackenslash wrote:No. In physics, an operator is more than a mathematical entity.

Nothing can be both a mathematical and a physical entity.

hackenslash wrote:

For example, energy, momentum and spin are all operators, and are real quantities.

"Physical Quantities:

Hermitian operators in the Hilbert space associated with a system represent physical quantities, and their eigenvalues represent the possible results of measurements of those quantities."

(http://plato.stanford.edu/entries/qm/)

This means that operators aren't physical quantities (properties) themselves but mathematical representations thereof.