On-chip spin-photon entanglement based on single-photon scattering
- URL: http://arxiv.org/abs/2205.12844v2
- Date: Mon, 3 Jul 2023 07:54:54 GMT
- Title: On-chip spin-photon entanglement based on single-photon scattering
- Authors: Ming Lai Chan, Alexey Tiranov, Martin Hayhurst Appel, Ying Wang,
Leonardo Midolo, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Anders
S{\o}ndberg S{\o}rensen and Peter Lodahl
- Abstract summary: We demonstrate an on-chip entangling gate between an incoming photon and a stationary quantum-dot spin qubit.
Results represent a major step in realizing a quantum node capable of both photonic entanglement generation and on-chip quantum logic.
- Score: 2.4567119332161234
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: The realization of on-chip quantum gates between 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 in
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 an on-chip entangling gate between an
incoming photon and a stationary quantum-dot spin qubit. The gate is based on
sequential scattering of a time-bin encoded photon with a waveguide-embedded
quantum dot and operates on sub-microsecond timescale; two orders of magnitude
faster than other platforms. Heralding on detection of a reflected photon
renders the gate fidelity fully immune to spectral wandering of the emitter.
These results represent a major step in realizing a quantum node capable of
both photonic entanglement generation and on-chip quantum logic, as demanded in
quantum networks and quantum repeaters.
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