Towards Realizing a Quantum Repeater based on a Spin-Photon Quantum Interface

In this talk, I will review recent experimental progresses in the development of a spin-photon quantum interface for the realization of a quantum repeater, including results from my previous group [1, 2]. I will discuss two different schemes that can be employed to realize a quantum repeater based on such a spin-photon quantum interface, one based on entanglement swapping and one based on photonic cluster states (also referred to as the one-way quantum repeater). I will highlight a recent proposal from our group on deterministic generation of photonic tree cluster states and repeater graph states by using only a single spin-tagged quantum emitter without any ancillary quantum memories [3], and discuss our vision in its experimental realizations.

[1] S. Sun et al., Nature Nanotechnology 11, 539–544 (2016)

[2] S. Sun et al., Science 361 (6397), 57-60 (2018)

[3] Y. Zhan and S. Sun, Physical Review Letters 125, 223601 (2020)