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Heath-bath effects in the dynamics of atom + cavity system are studied. The temperature effects are explored using thermofield dynamics formalism. It is found that the dynamics of the system is sensitive to small changes in the temperature and the thermal effects lead to increasing instabilities by causing transitions from regular to chaotic motion.Crown

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Experimental results for the absorption of ultrasonic waves in pure cyclohexanol and aqueous solution of cyclohexanol in the frequency range 0.06–150 MHz and at temperatures 30, 40, 50, and 60 °C are reported. The ultrasonic relaxation spectra of pure cyclohexanol investigated show two relaxation processes in contrast to those aqueous solutions of cyclohexanol, which indicate a single relaxation process. One relaxation process is located in the frequency range 0.01–1 MHz and the second in the range 0.8–10 GHz. The process with the lower relaxation frequency has been assigned to the “chair”–“chair” molecular conformations.

We consider the reflection-transmission of the Gaussian wave packet through the moving wall with absorbing boundary conditions based on the time dependent one-dimensional Schrödinger equation. The reflection coefficient is calculated for the case when the walls are fixed, and probability density is calculated for the case when the wall is moving linearly.