On the Duality of Teleportation and Dense Coding in Quantum Communication

Explore a conference talk from the 18th Theory of Quantum Computation, Communication and Cryptography Conference (TQC 2023) examining the relationship between quantum teleportation and dense coding protocols. Delve into how noisy entanglement affects quantum teleportation and discover a novel quantitative duality where teleportation protocols can be converted into dense coding protocols. Learn about the complete characterization of states offering no advantage in one-way teleportation over classical states, providing new insights into a significant open problem in quantum information science. Understand the implications for bound entangled states and their inability to exceed classical teleportation thresholds or provide advantages in dense coding. Examine the communication capacity perspective, including bounds on the accessible information of dense coding protocols in terms of teleportation fidelity. Delivered by Felix Leditzky at the University of Aveiro, Portugal, this 30-minute presentation advances theoretical understanding of quantum communication primitives and their interconnections.