Universal gates for a metastable qubit in strontium-88
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909648313909248 |
|---|---|
| author | Tao, Renhao Lib, Ohad Gyger, Flavien Timme, Hendrik Ammenwerth, Maximilian Bloch, Immanuel Zeiher, Johannes |
| author_facet | Tao, Renhao Lib, Ohad Gyger, Flavien Timme, Hendrik Ammenwerth, Maximilian Bloch, Immanuel Zeiher, Johannes |
| contents | Metastable atomic qubits are a highly promising platform for the realization of quantum computers, owing to their scalability and the possibility of converting leakage errors to erasure errors mid-circuit. Here, we demonstrate and characterize a universal gate set for the metastable fine-structure qubit encoded between the $^3\text{P}_0$ and $^3\text{P}_2$ states in bosonic strontium-88. We find single-qubit gate fidelities of 0.993(1), and two-qubit gate fidelities of 0.9945(6) after correcting for losses during the gate operation. Furthermore, we present a novel state-resolved detection scheme for the two fine-structure states that enables high-fidelity detection of qubit loss. Finally, we leverage the existence of a stable ground state outside the qubit subspace to perform mid-circuit erasure conversion using fast destructive imaging. Our results establish the strontium fine-structure qubit as a promising candidate for near-term error-corrected quantum computers, offering unique scaling perspectives. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_10714 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universal gates for a metastable qubit in strontium-88 Tao, Renhao Lib, Ohad Gyger, Flavien Timme, Hendrik Ammenwerth, Maximilian Bloch, Immanuel Zeiher, Johannes Quantum Physics Atomic Physics Metastable atomic qubits are a highly promising platform for the realization of quantum computers, owing to their scalability and the possibility of converting leakage errors to erasure errors mid-circuit. Here, we demonstrate and characterize a universal gate set for the metastable fine-structure qubit encoded between the $^3\text{P}_0$ and $^3\text{P}_2$ states in bosonic strontium-88. We find single-qubit gate fidelities of 0.993(1), and two-qubit gate fidelities of 0.9945(6) after correcting for losses during the gate operation. Furthermore, we present a novel state-resolved detection scheme for the two fine-structure states that enables high-fidelity detection of qubit loss. Finally, we leverage the existence of a stable ground state outside the qubit subspace to perform mid-circuit erasure conversion using fast destructive imaging. Our results establish the strontium fine-structure qubit as a promising candidate for near-term error-corrected quantum computers, offering unique scaling perspectives. |
| title | Universal gates for a metastable qubit in strontium-88 |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2506.10714 |