# Nonlocal Quantum Erasure of Phase Objects

## TL;DR

This paper demonstrates a nonlocal quantum erasure technique using a modified Franson interferometer to correct phase-object images, with potential applications in quantum imaging, microscopy, and secure communication.

## Contribution

It introduces an experimental method for nonlocal quantum erasure of phase objects using a modified Franson interferometer, expanding quantum imaging capabilities.

## Key findings

- Successful nonlocal erasure and correction of phase-object images
- Potential applications in quantum imaging and secure communication
- Demonstrates feasibility of nonlocal quantum erasure in practical setups

## Abstract

The Franson interference is a fourth order interference effect, which unlike the better known Hong-Ou-Mandel interference, does not require the entangled photon pairs to be present at the same space-time location for interference to occur - it is nonlocal. Here, we use a modified Franson interferometer to experimentally demonstrate the nonlocal erasure and correction of an image of a phase-object taken through coincidence imaging. This non-local quantum erasure technique can have several potential applications such as phase corrections in quantum imaging and microscopy and also user authentication of two foreign distant parties.