Interaction-free measurement and forward scattering
量子物理
2009-10-31 v1
摘要
Interaction-free measurement is shown to arise from the forward-scattered wave accompanying absorption: a "quantum silhouette" of the absorber. Accordingly, the process is not free of interaction. For a perfect absorber the forward-scattered wave is locked both in amplitude and in phase. For an imperfect one it has a nontrivial phase of dynamical origin (``colored silhouette"), measurable by interferometry. Other examples of quantum silhouettes, all controlled by unitarity, are briefly discussed.
引用
@article{arxiv.quant-ph/9804058,
title = {Interaction-free measurement and forward scattering},
author = {Tamás Geszti},
journal= {arXiv preprint arXiv:quant-ph/9804058},
year = {2009}
}
备注
4 pages in RevTex + 1 figure in eps; submitted to Phys. Rev. A since 09Jan98; now updated