Generation of frequency-bin heralded GHZ and W three-photon entangled states on integrated photonic chips

• Grant number: 25/01292-2
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• Start date: September 01, 2025
• End date: August 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Breno Marques Goncalves Teixeira
• Grantee: Eduardo da Costa Lima
• Supervisor: Daniele Bajoni
• Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
• Institution abroad: Università degli Studi di Pavia, Italy
• Associated to the scholarship: 23/03513-0 - Quantum correlated light source in photonic chips, BP.DD

Abstract

Photonic integrated devices has shown to be a great platform to generate and ma-nipulate quantum bipartite states with relatively easy techniques, but it is possible togo beyond to multipartite states by implementing new ways of information encoding.In such setups, states used in quantum computation and quantum communication canbe generated with high emission rates, such as GHZ and W states, for multiple pho-ton entanglement. In this project, we propose the experimental generation of GHZ andW heralded three-photon entangled states encoded in frequency, that is, a four-photonfrequency-bin. The photonic chips are based on Silicon Nitride waveguides, using infraredlight. We expect to generate frequency-bin heralded GHZ and W states with emissionrate of at least of 1 kHz.