Title: Entangled States: The Secret for Unhackable Communication and Reliable Computing

Speaker: Prof. Sourin Das, IISER, kolkata

Abstract: In this talk, I will introduce the concept of *k*-uniform states in *N*-qubit systems and examine their significance in the landscape of modern quantum information science. *K*-uniform states, defined by their property of maximal entanglement across every subset of *k* qubits, have drawn considerable attention for their potential in advancing various quantum technologies. I will highlight their applications in (a) Quantum Error Correction (QEC) and detection, (b) sequentially encodable quantum memory, and (c) Quantum Key Distribution (QKD), thereby emphasizing the essential role these states play in shaping the future of quantum information processing.

References:

1. n-qubit states with maximum entanglement across all bipartitions: A graph state approach, Sowrabh Sudevan, Sourin Das, arXiv:2201.05622

2. Multipartite entanglement and quantum error identification in D-dimensional cluster states Sowrabh Sudevan, Daniel Azses, Emanuele G. Dalla Torre, Eran Sela, Sourin Das, arXiv:2303.15508, Phys. Rev. A 108, 022426 (2023)

3. Sequentially Encodable Codeword Stabilized Codes Sowrabh Sudevan, Sourin Das, Thamadathil Aswanth, Nupur Patanker, Navin Kashyap, arXiv:2405.06142 , Proceedings of the 2024 International Symposium on Information Theory (ISIT 2024)

4. Codeword Stabilized Codes from m-Uniform Graph States, Accepted for publication in IEEE Journal on Selected Areas in Information Theory

5. Majority-Agreed Key Distribution using Absolutely Maximally Entangled Stabilizer States Sowrabh Sudevan, Ramij Rahaman, Sourin Das, arXiv:2411.15545