Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Q53: Quantum Networks: Modeling, Components and Demonstrations
3:00 PM–5:36 PM,
Wednesday, March 6, 2024
Room: 202AB
Sponsoring
Unit:
DQI
Chair: Allen Zang, University of Chicago
Abstract: Q53.00002 : Remote Quantum Networking with Single Rare-earth Ions: Tripartite Entanglement Heralding*
3:12 PM–3:24 PM
Presenter:
Chun-Ju Wu
(Caltech)
Authors:
Chun-Ju Wu
(Caltech)
Andrei Ruskuc
(Caltech)
Emanuel Green
(Caltech)
Sophie Hermans
(California Institute of Technology)
Joonhee Choi
(Stanford)
Andrei Faraon
(Caltech)
Here, we demonstrate the scalability of a novel entanglement protocol (presented in the previous talk) by generating tripartite entangled states of 171Yb:YVO4 optically addressed qubits, distributed between two remote nanophotonic cavities.
Specifically, we show that entanglement of three 171Yb ions can be heralded with a single photon protocol. Since the ions possess different optical frequencies, the stochastic photon detection time imprints two random quantum phases, leading to a mixed state. However, with precise measurement of the photon arrival time, the phases can be evaluated and counteracted in real-time via a feedforward phase shift of the qubits. Through this real-time phase compensation, we are able to prepare entangled three-ion W states with a fidelity of 60% and a heralding rate of 3 Hz. This result shows both the scalability of our platform and the robustness of our entanglement protocol.
*AFOSR FA9550-22-1-0178NSF 2210570IQIM - 2317110
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