A paradigm for entanglement and information swapping of two qubits

TL;DR

This paper explores how a general two-qubit unitary operation affects entanglement, entropy, and purity, revealing that initial product states can lead to zero entanglement during interaction.

Contribution

It introduces a general framework for analyzing entanglement dynamics in two-qubit systems with various initial states.

Findings

Initial product states can result in zero entanglement during evolution

Entanglement, entropy, and purity are influenced by initial state configurations

Distinct initial states lead to different entanglement dynamics

Abstract

Based on a general unitary operation of two-qubit system, we investigate the dynamics of entanglement, entropy and purity. Distinctive features in the different initial states settings of an interacting bipartite system are explored. The striking effects of initial product states on entanglement shows that zeros entanglement can be obtained during the development of the interaction.