Talk:Open Quantum Systems/The Density Matrix

Observable/Hermitian Basis
Partly question, partly suggestion: "Since the Pauli matrices $$\sigma_x, \sigma_y, \sigma_z$$ and the identity $$\sigma_0$$ form a basis for the vector space of hermitian $$2\times2$$ complex matrices, we can expand any observable..." I would mention the fact (? is it so?). --Nobelium (discuss • contribs) 18:56, 12 April 2014 (UTC)
 * Thanks for your suggestion (and your other edits), I have updated the article. Hweimer (discuss • contribs) 15:00, 19 May 2014 (UTC)