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In this Letter we investigate the lower bound energy of the usual Hamiltonian employed in Quantum Optics to model the interaction between a harmonic oscillator and a reservoir without the rotating wave approximation. We show that this model has serious inconsistencies and then we discuss the origin of these inconsistencies.
We study the peculiarities of the nonstationary Casimir effect (creation of photons in cavities with moving boundaries) in the special case of two resonantly coupled modes with frequencies ω 0 and (3+Δ)ω 0 , parametrically excited due to small amplitude oscillations of the ideal cavity wall at the frequency 2ω 0 (1+δ) (with δ , Δ 1). The effects of thermally induced...
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