Quantum Manipulation of Ultracold Atoms
نویسندگان
چکیده
The generation of photon pairs is useful for a broad range of applications, from the fundamental (exclusion of hidden-variable formulations of quantum mechanics) to the more practical (quantum cryptography and quantum computation). A key parameter determining the usefulness of a particular source is its brightness, i.e., how many photon pairs per second are generated into a particular electromagnetic mode and frequency bandwidth. Parametric down-converters based on nonlinear crystals are excellent sources of photon pairs, but typically have large bandwidths of hundreds of GHz. However, new applications are emerging that demand large pair-generation rates into the narrow bandwidths (5 MHz) suitable for strong interaction of the photons with atoms and molecules.
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