Coherence effects on estimating two-point separation

Abstract

The quantum Fisher information (FI), when applied to the estimation of the separation of two point sources, has been shown to be non-zero in cases where the coherence between the sources is known. Although it has been claimed that ignorance of the coherence causes the quantum FI to vanish (a resurgence of Rayleigh’s curse), a more complete analysis including both the magnitude and phase of the coherence parameter is given here. Partial ignorance of the coherence is shown to potentially break Rayleigh’s curse, whereas complete ignorance guarantees its resurgence.

Document Details

Document Type
Pub Defense Publication
Publication Date
Feb 16, 2021
Source ID
10.1364/optica.403497

Entities

People

  • A. N. Vamivakas
  • Kevin Liang
  • S. A. Wadood

Organizations

  • Defense Advanced Research Projects Agency

Tags

Readers

  • Calculus or Mathematical Analysis
  • Political Violence and Terrorism Studies.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Quantum Computing
  • Quantum Science - Quantum Dots