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Quantum entanglement of linearly coupled quantum harmonic oscillators

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Quantum harmonic oscillators coupled through coordinates and momenta, represented by the Hamiltonian H[over ̂]=∑_{i=1}^{2}(p[over ̂]_{i}^{2}/2m_{i}+m_{i}ω_{i}^{2}/2x_{i}^{2})+H[over ̂]_{int}, where the interaction of two oscillators H[over ̂]_{int}=ik_{1... ...