Isolated spin qubits in SiC with a high-fidelity infrared spin-to-photon interface
| Autor: | Christle, David J., Klimov, Paul V., Casas, Charles F. de las, Szász, Krisztián, Ivády, Viktor, Jokubavicius, Valdas, Hassan, Jawad ul, Syväjärvi, Mikael, Koehl, William F., Ohshima, Takeshi, Son, Nguyen T., Janzén, Erik, Gali, Ádám, Awschalom, David D. |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Phys. Rev. X 7, 021046 (2017) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevX.7.021046 |
| Popis: | The divacancies in SiC are a family of paramagnetic defects that show promise for quantum communication technologies due to their long-lived electron spin coherence and their optical addressability at near-telecom wavelengths. Nonetheless, a mechanism for high-fidelity spin-to-photon conversion, which is a crucial prerequisite for such technologies, has not yet been demonstrated. Here we demonstrate a high-fidelity spin-to-photon interface in isolated divacancies in epitaxial films of 3C-SiC and 4H-SiC. Our data show that divacancies in 4H-SiC have minimal undesirable spin-mixing, and that the optical linewidths in our current sample are already similar to those of recent remote entanglement demonstrations in other systems. Moreover, we find that 3C-SiC divacancies have millisecond Hahn-echo spin coherence time, which is among the longest measured in a naturally isotopic solid. The presence of defects with these properties in a commercial semiconductor that can be heteroepitaxially grown as a thin film on shows promise for future quantum networks based on SiC defects. Comment: 26 pages, 4 figures |
| Databáze: | arXiv |
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