Physics – Quantum Physics
Scientific paper
2009-03-25
Physics
Quantum Physics
7 pages, 3 figures
Scientific paper
Starting from a microscopic theory, we derive a master equation for a harmonic oscillator coupled to a bath of non-interacting oscillators. We follow a non-perturbative approach, proposed earlier by us for the free Brownian particle. The diffusion constants are calculated analytically and the positivity of the Master Equation is shown to hold above a critical temperature. We compare the long time behaviour of the average kinetic and potential energies with known thermodynamic results. In the limit of vainishing oscillator frequency of the system, we recover the results of the free Brownian particle.
Kumar Jishad
Sinha Supurna
Sreeram P. A.
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