Gain narrowing in few-atom systems

Details Gain narrowing in few-atom systems Gain narrowing in few-atom systems

2006-04-06

arxiv.org/abs/quant-ph/0604040v2

Phys. Rev. Lett. 98, 103601 (2007)

Physics

Quantum Physics

Scientific paper

Using a density matrix approach, we study the simplest systems that display both gain and feedback: clusters of 2 to 5 atoms, one of which is pumped. The other atoms supply feedback through multiple scattering of light. We show that, if the atoms are in each other's near-field, the system exhibits large gain narrowing and spectral mode redistribution. The observed phenomena are more pronounced if the feedback is enhanced. Our system is to our knowledge the simplest exactly solvable microscopic system which shows the approach to laser oscillation.

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