Density Matrix and Squeezed Vacuum State for General CouplingHarmonic Oscillator |
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| Authors: | SONG Tong-Qiang |
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| Affiliation: | Department of Physics, Ningbo University, Ningbo 315211, China |
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| Abstract: | By taking a unitary transformation approach, we study two harmonicoscillators with both kinetic coupling and coordinate coupling terms, andderive the density matrix of the system. The results show that the groundstate of the system is a rotated two single-mode squeezed state. |
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| Keywords: | density matrix squeezed vacuum state coupling harmonic oscillator |
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