Published June 23, 2017
| Version v1
Journal article
Open
Isolated spin qubits in SiC with a high-fidelity infrared spin-to-photon interface
Creators
- 1. University of Chicago
- 2. Hungarian Academy of Sciences
- 3. Linköping University
- 4. National Institutes for Quantum and Radiological Science and Technology
Description
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 high-fidelity spin-photon interface, which is a crucial prerequisite for such technologies, has not yet been demonstrated. Here, we demonstrate that such an interface exists 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 a 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 Si shows promise for future quantum networks based on SiC defects.
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PhysRevX.7.021046.pdf
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Additional details
Identifiers
- DOI
- 10.1103/PhysRevX.7.021046
- Other
- oai:uchicago.tind.io:11434
Funding
- National Science Foundation
- 1641099
- Directorate for Mathematical and Physical Sciences
- 1420709