Quantum nondemolition measurement of photon-number distribution for a weak cavity field with resonant atoms

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: quantum nondemolition measurement photon-number distribution resonant atom
• 年，卷（期）: 2003,（1）
• 页码范围: 51-54
• 页数: 4页
• 分类号: O4
• 语种: 英文

摘要

We propose a quantum nondemolition measurement of the photon-number distribution for a weak cavity field with no more than two photons. The scheme is based on the resonant interaction of atoms with the cavity field, and thus the required interaction time is much shorter than that using dispersive interaction. This is important in view of decoherence. Our scheme can also be used to generate even and odd coherent states for a weak cavity field with resonant atoms.