Approaching Quantum-Limited Amplification with Large Gain Catalyzed by Optical Parametric Amplifier Medium

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2017,（7）
• 页码范围: 76-82
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/0253-6102/68/1/76

摘要

Amplifier is at the heart of experiments carrying out the precise measurement of a weak signal.An idea quantum amplifier should have a large gain and minimum added noise simultaneously.Here,we consider the quantum measurement properties of the cavity with the OPA medium in the op-amp mode to amplify an input signal.We show that our nonlinear-cavity quantum amplifier has large gain in the single-value stable regime and achieves quantum limit unconditionally.