Atomic state that is a coherent superposition?

[meyol99]

Can someone explain the meaning of the k vector and the general meaning of this equation?

 

[BvU]

1) k is the wave number $2\pi\over \lambda$
2) difficult if you don't show where this is appearing. Some Stokes amplitude ? In particular: what the $| g_j\rangle_n$ stand for.

 

[meyol99]

 

[PeterDonis]

@meyol99 please give a reference for what you are quoting from.

 

[meyol99]

Nicolas Sangouard, Christoph Simon, Hugues de Riedmatten, and Nicolas Gisin
"Quantum repeaters based on atomic ensembles and linear optics",
Rev. Mod. Phys. 83, 33 – Published 21 March 2011

 

[DrChinese]

Nicolas Sangouard, Christoph Simon, Hugues de Riedmatten, and Nicolas Gisin
"Quantum repeaters based on atomic ensembles and linear optics",
Rev. Mod. Phys. 83, 33 – Published 21 March 2011

Here it is:

https://arxiv.org/abs/0906.2699