Emergence of quantum correlations from nonlocality swapping

Area of Science:

• Foundational physics
• Quantum information theory
• Nonlocality studies

Background:

• Generalized nonsignaling theories aim to identify unique features of quantum mechanics.
• Nonsignaling boxes are a key model for studying these theories.

Purpose of the Study:

• To develop a generalized nonsignaling model exhibiting quantumlike dynamics.
• To introduce the concept of a 'genuine box' within this framework.
• To explore phenomena analogous to quantum entanglement swapping and teleportation in a non-quantum context.

Main Methods:

• Revisiting and analyzing the paradigmatic model of nonsignaling boxes.
• Introducing and defining the concept of a 'genuine box'.
• Developing a 'coupler' device to facilitate nonlocality swapping.

Main Results:

• Presentation of the first generalized nonsignaling model with quantumlike dynamics.
• Demonstration of nonlocality swapping, analogous to quantum entanglement swapping.
• Demonstration of teleportation within the generalized nonsignaling framework.
• Emergence of a boundary between quantum and post-quantum correlations.

Conclusions:

• The developed generalized nonsignaling model provides a new platform for studying quantumlike phenomena.
• The study highlights the potential for non-quantum theories to exhibit complex correlations.
• The findings contribute to understanding the fundamental differences and similarities between quantum and other correlation theories.