On-chip spin-photon entanglement based on photon-scattering of a quantum dot
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On-chip spin-photon entanglement based on photon-scattering of a quantum dot. / Chan, Ming Lai; Tiranov, Alexey; Appel, Martin Hayhurst; Wang, Ying; Midolo, Leonardo; Scholz, Sven; Wieck, Andreas D.; Ludwig, Arne; Sorensen, Anders Sondberg; Lodahl, Peter.
In: npj Quantum Information, Vol. 9, No. 1, 49, 19.05.2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - On-chip spin-photon entanglement based on photon-scattering of a quantum dot
AU - Chan, Ming Lai
AU - Tiranov, Alexey
AU - Appel, Martin Hayhurst
AU - Wang, Ying
AU - Midolo, Leonardo
AU - Scholz, Sven
AU - Wieck, Andreas D.
AU - Ludwig, Arne
AU - Sorensen, Anders Sondberg
AU - Lodahl, Peter
PY - 2023/5/19
Y1 - 2023/5/19
N2 - The realization of on-chip quantum interfaces between flying photons and solid-state spins is a key building block for quantum-information processors, enabling, e.g., distributed quantum computing, where remote quantum registers are interconnected by flying photons. Self-assembled quantum dots integrated into nanostructures are one of the most promising systems for such an endeavor thanks to their near-unity photon-emitter coupling and fast spontaneous emission rate. Here we demonstrate high-fidelity on-chip entanglement between an incoming photon and a stationary quantum-dot hole spin qubit. The entanglement is induced by sequential scattering of the time-bin encoded photon interleaved with active spin control within a microsecond, two orders of magnitude faster than those achieved in other solid-state platforms. Conditioning on the detection of a reflected photon renders the entanglement fidelity immune to the spectral wandering of the emitter. These results represent a major step towards realizing a quantum node capable of interchanging information with flying photons and on-chip quantum logic, as required for quantum networks and quantum repeaters.
AB - The realization of on-chip quantum interfaces between flying photons and solid-state spins is a key building block for quantum-information processors, enabling, e.g., distributed quantum computing, where remote quantum registers are interconnected by flying photons. Self-assembled quantum dots integrated into nanostructures are one of the most promising systems for such an endeavor thanks to their near-unity photon-emitter coupling and fast spontaneous emission rate. Here we demonstrate high-fidelity on-chip entanglement between an incoming photon and a stationary quantum-dot hole spin qubit. The entanglement is induced by sequential scattering of the time-bin encoded photon interleaved with active spin control within a microsecond, two orders of magnitude faster than those achieved in other solid-state platforms. Conditioning on the detection of a reflected photon renders the entanglement fidelity immune to the spectral wandering of the emitter. These results represent a major step towards realizing a quantum node capable of interchanging information with flying photons and on-chip quantum logic, as required for quantum networks and quantum repeaters.
KW - LOGIC GATE
KW - STATE
KW - GENERATION
KW - INTERFACE
KW - TRANSPORT
KW - ATOM
U2 - 10.1038/s41534-023-00717-5
DO - 10.1038/s41534-023-00717-5
M3 - Journal article
VL - 9
JO - npj Quantum Information
JF - npj Quantum Information
SN - 2056-6387
IS - 1
M1 - 49
ER -
ID: 347790498