Fast programmable entanglement of Barium ion qubits using Rydberg states and AC-Stark shifts
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| Format: | Preprint |
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2025
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| _version_ | 1866915404951060480 |
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| author | Vernon, Adam R. Peaks, Mitch |
| author_facet | Vernon, Adam R. Peaks, Mitch |
| contents | A scheme for excitation and individual addressing using Rydberg states of trapped Barium ions is presented for the purpose of fast gates and entanglement. Dipole matrix elements, dynamic polarizabilities, and one- and two-photon transition strengths are computed with a Supersymmetric Wentzel-Kramers-Brillouin (SWKB) method. A favorable two-photon excitation transition is identified, linking the 7s$1/2$ state to high-lying Rydberg states, with the strongest transition found to be 7s12->38s12. Additionally, the 7s1/2 state exhibits high polarizability around the telecom band at 1310 nm, enabling significant AC-Stark shift control with a turnkey laser at low power. This facilitates an individual addressing scheme by varying light intensity across an ion crystal, supporting sub-microsecond entangling gates between ion pairs with the strong and microwave-tunable Rydberg dipolar interaction. Selective addressing of individual ions by laser frequency tuning using the 6p3/2->7s1/2 transition is proposed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_00611 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fast programmable entanglement of Barium ion qubits using Rydberg states and AC-Stark shifts Vernon, Adam R. Peaks, Mitch Atomic Physics A scheme for excitation and individual addressing using Rydberg states of trapped Barium ions is presented for the purpose of fast gates and entanglement. Dipole matrix elements, dynamic polarizabilities, and one- and two-photon transition strengths are computed with a Supersymmetric Wentzel-Kramers-Brillouin (SWKB) method. A favorable two-photon excitation transition is identified, linking the 7s$1/2$ state to high-lying Rydberg states, with the strongest transition found to be 7s12->38s12. Additionally, the 7s1/2 state exhibits high polarizability around the telecom band at 1310 nm, enabling significant AC-Stark shift control with a turnkey laser at low power. This facilitates an individual addressing scheme by varying light intensity across an ion crystal, supporting sub-microsecond entangling gates between ion pairs with the strong and microwave-tunable Rydberg dipolar interaction. Selective addressing of individual ions by laser frequency tuning using the 6p3/2->7s1/2 transition is proposed. |
| title | Fast programmable entanglement of Barium ion qubits using Rydberg states and AC-Stark shifts |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2506.00611 |