Bell's theorem, its foundations and applications in quantum communication

• Grant number: 24/19722-0
• Support Opportunities: Scholarships in Brazil - Program to Stimulate Scientific Vocations
• Start date: January 08, 2025
• End date: February 14, 2025
• Field of knowledge: Physical Sciences and Mathematics - Physics
• Principal Investigator: Rafael Chaves Souto Araujo
• Grantee: Henrique Vieira dos Santos Guerra
• Host Institution: Instituto Internacional de Física. Universidade Federal do Rio Grande do Norte (UFRN). Natal , SP, Brazil

Abstract

The violation of a Bell inequality brings to light the so-called quantum non-locality, essential for tasks such as quantum cryptography and understanding the limits of information processing. However, the traditional focus on causal structures constrained by Bell's theorem limits our understanding of quantum phenomena in more complex networks. With the growing investment from governments and companies in larger and more complex quantum networks, there is an urgent need to explore beyond these limitations, aiming for the development of the quantum internet. This work plan seeks to advance by exploring networks beyond Bell's structure, investigating new non-classical behaviors and their practical applications in communication, cryptography, and distributed computing. (AU)