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A research field within general optical physics concerned with light and its material interaction: where light is modelled by full quantum mechanical description.

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Stimulated emission interrupted by collisions

When the atom is emitting electromagnetic wave in a classical view it is an oscillating dipole. If during the emission that atom interacts with another atom via collision, emission is interrupted and …
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Stimulated emission interrupted by collisions

Ok, so I learned the answer to that problem. As the atoms never truly collide, like ping-pong balls can in a microscopic view, the effect is easily explainable. During the emission of a photon, when …
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1 vote
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Virtual energy level in the Bloch sphere representation

How the Bloch vector would evolve, if the electron makes a transition to a virtual energy level (placed below the excited state of our two-level atom), as it does in all sorts of phenomena in nonlinea …
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4 votes
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Photons in coulomb field

Does coulomb field contain photons? As 1 THz and 1 kHz fields differ only in frequency, how does 0 Hz field differ from them?
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