Entanglement in bosonic systems
Stein Olav Skrøvseth · Physical Review A · 2005
We present a technique to resolve a Gaussian density matrix and its time evolution through known expectation values in position and momentum. Further we find the full spectrum of this density matrix and apply the technique to a chain of harmonic oscillators to find agreement with conformal field theory in this domain. We also observe that a nonconformal state has a divergent entanglement entropy.