Physics – Quantum Physics
Scientific paper
2005-08-22
Phys. Rev. A 72, 062305 (2005)
Physics
Quantum Physics
7 pages, 6 figures
Scientific paper
10.1103/PhysRevA.72.062305
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.
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