Performance analysis of quantum repeaters enabled by deterministically generated photonic graph states

• DOI: 10.22331/q-2023-02-16-924
• Publication Date: 2023-02-16T11:56:30Z
• Authors: Yuan Zhan; Paul Hilaire; Edwin Barnes; Sophia E. Economou; Shuo Sun
• Keywords: Quantum Physics; Physics; QC1-999; 0103 physical sciences; FOS: Physical sciences; Quantum Physics (quant-ph); 01 natural sciences

By encoding logical qubits into specific types of photonic graph states, one can realize quantum repeaters that enable fast entanglement distribution rates approaching classical communication. However, the generation these states requires a formidable resource overhead using traditional approaches based on linear optics. Overcoming this challenge, number new schemes have been proposed employ emitters to deterministically generate states. Although potential significantly reduce cost, systematic comparison repeater performance among different encodings and is lacking. Here, we quantitatively analyze two i.e. tree For both compare between schemes, single emitter coupled ancillary matter qubits, delayed feedback. We identify numerically optimal scheme at system parameters. Our analysis provides clear guideline selection for graph-state-based repeaters, lays out parameter requirements future experimental realizations schemes.