An efficient quantum filter for multiphoton states
量子物理
2009-11-10 v2
摘要
We propose a scheme for implementing a multipartite quantum filter that uses entangled photons as a resource. It is shown that the success probability for the 2-photon parity filter can be as high as 1/2, which is the highest that has so far been predicted without the help of universal two-qubit quantum gates. Furthermore, the required number of ancilla photons is the least of all current parity filter proposals. Remarkably, the quantum filter operates with probability 1/2 even in the N-photon case, irregardless of the number of photons in the input state.
引用
@article{arxiv.quant-ph/0406008,
title = {An efficient quantum filter for multiphoton states},
author = {Yuan Liang Lim and Almut Beige},
journal= {arXiv preprint arXiv:quant-ph/0406008},
year = {2009}
}
备注
8 pages, 2 figures, revised version, accepted for publication in J. Mod. Opt