Sudden Death of Entanglement

TL;DR

This paper reviews recent progress on entanglement sudden death, a phenomenon where environmental noise rapidly destroys quantum entanglement, challenging the robustness of quantum information systems.

Contribution

It summarizes recent findings on entanglement sudden death, highlighting its implications for quantum information and the understanding of quantum decoherence.

Findings

Entanglement can be abruptly destroyed by environmental noise.

ESD occurs faster than traditional decoherence models predict.

Understanding ESD is crucial for developing robust quantum technologies.

Abstract

A new development in the dynamical behavior of elementary quantum systems is the surprising discovery that correlation between two quantum units of information called qubits can be degraded by environmental noise in a way not seen previously in studies of dissipation. This new route for dissipation attacks quantum entanglement, the essential resource for quantum information as well as the central feature in the Einstein-Podolsky-Rosen so-called paradox and in discussions of the fate of Schr\"{o}inger's cat. The effect has been labeled ESD, which stands for early-stage disentanglement or, more frequently, entanglement sudden death. We review recent progress in studies focused on this phenomenon.