The paper analyzes the interaction of an atomic system with a quantum damped harmonic oscillator. Such an oscillator is the building block in the recently proposed models of bulk dielectrics and may also serve as a simple model of a small dielectric body. Dispersion and losses are taken into account by assuming the oscillator to be coupled to a zero-temperature reservoir consisting of an infini...

Experiments on periodically oscillating arrays consisting of from one to 64 nickel electrodes in sulfuric acid are carried out. Harmonic and relaxation oscillations that occur respectively in two regions of parameter space are considered. External resistors in parallel and series are added to vary the extent of global coupling among the oscillators. The array is heterogeneous due to small varia...

It is demonstrated that the general theory of Casimir and van der Waals forces describes interaction-induced equilibrium thermodynamic potentials damped harmonic oscillator bilinearly coupled to environment. An extended model for a suggested along lines forces, corresponding quantities obtained. While original involves heat bath consisting large number free oscillators having infinitesimal damp...

We discuss the fate of initial states of the cat type for the damped harmonic oscillator, mostly employing a linear version of the stochastic Schrödinger equation. We also comment on how such cat states might be prepared and on the relation of single realizations of the noise to single runs of experiments. Typeset using REVTEX 1

In this paper we consider the classical and quantum control of squeezed states of harmonic oscillators. This provides a method for reducing noise below the quantum limit and provides an example of the control of under-actuated systems in the stochastic and quantum context. We consider also the interaction of a squeezed quantum oscillator with an external heat bath.

The GP2 peptide is derived from the Human Epidermal growth factor Receptor 2 (HER2/nue), a marker protein for breast cancer present in saliva. In this paper we study the temperature dependent behavior of hydrated GP2 at terahertz frequencies and find that the peptide undergoes a dynamic transition between 200 and 220 K. By fitting suitable molecular models to the frequency response we determine...

In this work we investigate the propagation of electromagnetic waves in a homogenous dielectric linear medium with time-varying electric permittivity modulated exponentially at constant rate and de Sitter spacetime. We demonstrate that classical quantum dynamics for both cases are equivalent can be mapped into damped harmonic oscillators which generated by similar Hamiltonians. By making use Le...