Preparation of narrow-band photons for atomic-based quantum memory with a type-I phase matched periodical poled KTP crystal
Bao-sen SHI (史保森) , Chang ZHAI (翟畅) , Fu-yuan WANG (王福源) , Guang-can GUO (郭光灿)
Front. Phys. ›› 2010, Vol. 5 ›› Issue (2) : 131 -146.
Preparation of narrow-band photons for atomic-based quantum memory with a type-I phase matched periodical poled KTP crystal
Transferring a quantum state between a photon and a quantum memory is the key point for realizing a long-distance quantum communication, and is also a basic ingredient of linear optical quantum computation. In an atomic-based network, the efficient coupling between a photon and an atomic system is a prerequisite for realizing the transfer of information between them, which requires that the photon should have a comparable bandwidth with the natural bandwidth of an atom. Therefore, generating a narrow-band photon has become a very important topic in the quantum information field. One simple and efficient way is cavity-enhanced spontaneously parametric down-conversion. In this paper, we will review and introduce a series of experiments done in our group for realizing this goal. We believe these works are very useful for the research in this direction.
quantum memory / narrow-band photons / KTP crystal
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Higher Education Press and Springer-Verlag Berlin Heidelberg
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