Interferometric binary phase estimations

TL;DR

This paper introduces a global interferometric method for estimating an unknown phase with Heisenberg-limited precision, requiring no prior information and capable of arbitrary uncertainty reduction.

Contribution

It presents a novel interferometric scheme that encodes phase information in binary bits, achieving Heisenberg-limited accuracy without prior phase knowledge.

Findings

Achieves Heisenberg limit independently of output statistics

Requires no prior information for phase estimation

Demonstrates effectiveness through simulations

Abstract

We propose an interferometric scheme where each photon returns one bit of the binary expansion of an unknown phase. It sets up a method for estimating the phase value at arbitrary uncertainty. This strategy is global, since it requires no prior information, and it achieves the Heisenberg bound independently of the output statistics. We provide simulations and a characterization of this architecture.