| Autor: |
Kuroyama, Kazuyuki, Larsson, Marcus, Muramoto, Jo, Heya, Kentaro, Fujita, Takafumi, Allison, Giles, Valentin, Sascha R., Ludwig, Arne, Wieck, Andreas D., Matsuo, Sadashige, Oiwa, Akira, Tarucha, Seigo |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 99, 085203 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.99.085203 |
| Popis: |
Electron spins in GaAs quantum dots have been used to make qubits with high-fidelity gating and long coherence time, necessary ingredients in solid-state quantum computing. The quantum dots can also host photon qubits with energy applicable for optical communication, and can show a promising photon-to-spin conversion. The coherent interface is established through photo-excitation of a single pair of an electron and a Zeeman-resolved light-hole, not heavy-hole. However, no experiments on the single photon to spin conversion have been performed yet. Here we report on single shot readout of a single electron spin generated in a GaAs quantum dot by spin-selective excitation with linearly polarized light. A photo-electron spin generated from a Zeeman-resolved light-hole exciton is detected using an optical spin blockade method in a single quantum dot and a Pauli spin blockade method in a double quantum dot. We found that the blockade probability strongly depends on the photon polarization and the hole state, heavy- or light-hole, indicating a transfer of the angular momentum from single photons to single electron spins. Our demonstration will open a pathway to further investigation on fundamental quantum physics such as quantum entanglement between a wide variety of quantum systems and applications of quantum networking technology. |
| Databáze: |
arXiv |
| Externí odkaz: |
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