This letter is used to represent the weighted sum over the outer product of each possible state with itself for a mixed quantum state, the density matrix.
The meson prefixed by this letter is the vector meson isospin triplet. This letter is used to represent the weighted sum over the outer product of each possible state with itself for a mixed quantum state, the density matrix. This letter represents a quantity given by the derivative of charge with respect to (*) volume, and is proportional to the divergence of the electric field by Gauss's law. It also represents the ratio between the magnitudes of the applied magnetic field and current density in a material, the resistivity. This Greek letter is used to represent a quantity measured against water to give specific gravity. For 10 points, name this Greek letter used to represent density.
The meson prefixed by this letter is the vector meson isospin triplet.
rho