IISER MOHALI

Abstract: Connecting quantum devices across large distances in a quantum network presents a multifaceted challenge, intricately linked to the diverse properties of different hardware platforms, some optimized as processing nodes, while others as quantum repeaters. From distributing entanglement over short distances to facilitating quantum communication across intercity scales, each network segment demands tailored requirements and improvement over the current state-of-the-art. This talk introduces the core building blocks of a quantum network, accessible for beginners, followed by an exploration of an application, namely, quantum teleportation. We analyze key trade-offs—such as coherence time, entanglement generation rate, and fidelity—required for achieving deterministic teleportation with fidelity beyond the classical limit. Using both analytical models and an extensive simulation framework implemented with NetSquid, a discrete-event simulator for quantum networks, we identify the hardware improvements essential for realizing quantum teleportation in real-world networks.