# Color Erasure Detectors Enable Chromatic Interferometry

## TL;DR

This paper introduces color erasure detectors that leverage quantum entanglement to enable chromatic interferometry, allowing interference measurements across different photon wavelengths with potential applications in microscopy and astronomy.

## Contribution

The paper presents a novel detector design that erases photon color information, facilitating new interferometry techniques across diverse wavelengths.

## Key findings

- Successfully demonstrated chromatic interferometry experimentally.
- Observed robust interference with both coherent and incoherent photon sources.
- Showcased potential applications in microscopy and astronomy.

## Abstract

By engineering and manipulating quantum entanglement between incoming photons and experimental apparatus, we construct single-photon detectors which cannot distinguish between photons of very different wavelengths. These color erasure detectors enable a new kind of intensity interferometry, with potential applications in microscopy and astronomy. We demonstrate chromatic interferometry experimentally, observing robust interference using both coherent and incoherent photon sources.