Work

Conclusive precision bounds for SU(1,1) interferometers

Year: 2019

Type: article

Abstract: In this paper, we revisit the quantum Fisher information (QFI) calculation in SU(1,1) interferometer considering different phase configurations. When one of the input modes is a vacuum state, we show by using phase averaging, different phase configurations give the same QFI. In addition, by casting the phase estimation as a two-parameter estimation problem, we show that the calculation of the quantum Fisher information matrix (QFIM) is necessary in general. Particularly, within this setup, the phase-averaging method is equivalent to a two-parameter estimation problem. We also calculate the phase sensitivity for different input states using QFIM approach.

Source: Physical Review A

DOI: 10.1103/physreva.99.042122

Authors: Chenglong You, Sushovit Adhikari, Xiaoping Ma, Masahide Sasaki, Masahiro Takeoka, Jonathan P. Dowling

Institutions: Louisiana State University, National Institute of Information and Communications Technology, Qingdao University of Science and Technology, Ocean University of China, University of Science and Technology of China, New York University Shanghai

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, National Natural Science Foundation of China, Army Research Office

OpenAlex ID: W2897998228

FWCI: 2.391

Cites: 26

Cited by: 47

Related to: 10