Quantum Disentanglement Eraser: an optical implementation using three-photon spontaneous decay

TL;DR

This paper proposes an optical implementation of the quantum disentanglement eraser using three-photon spontaneous decay, demonstrating how information erasure can restore entanglement and its relevance for quantum computation.

Contribution

It introduces a practical optical setup for the disentanglement eraser using three-photon decay, linking quantum information concepts with experimental implementation.

Findings

Proposed an optical scheme using three-photon decay in a crystal.

Illustrated the role of information erasure in restoring entanglement.

Highlighted potential applications in quantum computation.

Abstract

The 'disentanglement eraser' or 'entanglement restorer' scheme allows retrieving entanglement by erasing the information about the formation of a classical (or separable) state. It suggests an analogy between the pairs of properties: entangled-separable and wave-particle, the latter as described in the 'quantum eraser'. The scheme illustrates the physical importance of information in quantum systems, and it is also useful as a building block for quantum computation. An optical setup for its simple implementation using three-photon decay in a centro-symmetrical crystal is proposed.