Optimal gain sensing of quantum-limited phase-insensitive amplifiers

• Main Authors: Nair, Ranjith, Tham, Guo Yao, Gu, Mile
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Physics; Ancilla Systems; Input Field
• Online Access: https://hdl.handle.net/10356/161264
• Institution: Nanyang Technological University

Phase-insensitive optical amplifiers uniformly amplify each quadrature of an input field and are of both fundamental and technological importance. We find the quantum limit on the precision of estimating the gain of a quantum-limited phase-insensitive amplifier using a multimode probe that may also...