High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers
Diamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen-vacancy (NV) electron spins enabling scalable entangle...
Saved in:
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2025-05-01
|
| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.15.021069 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Diamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen-vacancy (NV) electron spins enabling scalable entanglement. Entanglement between dipolar-coupled NV spin pairs has been demonstrated but with a limited fidelity, and its error sources have not been characterized. Here, we design and implement a robust two-qubit gate between NV electron spins in diamond and quantify the influence of multiple error sources on the gate performance. Experimentally, we demonstrate a record gate fidelity of F_{2q}=(96.0±2.5)% under ambient conditions. Our identification of the dominant errors paves the way towards NV-NV gates beyond the error correction threshold. |
|---|---|
| ISSN: | 2160-3308 |