What are the eigenvalues and eigenvectors of 4x4 density matrix?

I have a 4x4 density matrix (Trace 1) whose elements are nonzero. Its form is a  b  c  d b* e  f  g c* f* h  j d* g* j* k where a+e+h+k=1. Is there a simple way to find eigenvalues and...

26 May 2016 5,105 2 View