Entanglement in bosonic systems
arXiv:quant-ph/0508160 · doi:10.1103/PhysRevA.72.062305
Abstract
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 non-conformal state has a divergent entanglement entropy.
7 pages, 6 figures