Physics – Quantum Physics
Scientific paper
2010-10-14
Physics
Quantum Physics
Published in Physical Review A 82, 043814 (2010)
Scientific paper
10.1103/PhysRevA.82.043814
We propose to shape biphoton wave packets with an electromagnetically induced grating in a four-level double-$\Lambda$ cold atomic system. We show that the induced hybrid grating plays an essential role in directing the new fields into different angular positions, especially to the zeroth-order diffraction. A number of interesting features appear in the shaped two-photon waveforms. For example, broadening or narrowing the spectrum would be possible in the proposed scheme even without the use of a cavity.
Du Shengwang
Wen Jianming
Xiao Min
Zhai Yanhua
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