Quantum control of a single $\mathrm{H}_2^+$ molecular ion
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909680158113792 |
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| author | Holzapfel, David Schmid, Fabian Schwegler, Nick Stadler, Oliver Stadler, Martin Ferk, Alexander Home, Jonathan P. Kienzler, Daniel |
| author_facet | Holzapfel, David Schmid, Fabian Schwegler, Nick Stadler, Oliver Stadler, Martin Ferk, Alexander Home, Jonathan P. Kienzler, Daniel |
| contents | Science is founded on the benchmarking of theoretical models against experimental measurements, with the challenge that for all but the simplest systems, the calculations required for high precision become extremely challenging. $\mathrm{H}_2^+$ is the simplest stable molecule, and its structure is calculable to high precision. However, studying $\mathrm{H}_2^+$ experimentally presents significant challenges: Standard control methods such as laser cooling are not applicable due to the long lifetimes of its rotational and vibrational states. Here we solve this issue by combining buffer gas cooling to quench the $\mathrm{H}_2^+$ rovibrational excitation with quantum logic operations between $\mathrm{H}_2^+$ and a co-trapped 'helper' ion to control the molecule's hyperfine structure. This enables us to perform pure quantum state preparation, coherent control, and non-destructive readout, which we use to demonstrate high-resolution microwave spectroscopy in the hyperfine structure of $\mathrm{H}_2^+$ with a precision of 2 Hz. Our results pave the way for high precision spectroscopy of $\mathrm{H}_2^+$ in both the microwave and optical domains. Due to the wide applicability of buffer gas cooling, our method provides a general tool for molecular ion species that are hard to control with quantum logic tools alone. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_06495 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum control of a single $\mathrm{H}_2^+$ molecular ion Holzapfel, David Schmid, Fabian Schwegler, Nick Stadler, Oliver Stadler, Martin Ferk, Alexander Home, Jonathan P. Kienzler, Daniel Atomic Physics Chemical Physics Quantum Physics Science is founded on the benchmarking of theoretical models against experimental measurements, with the challenge that for all but the simplest systems, the calculations required for high precision become extremely challenging. $\mathrm{H}_2^+$ is the simplest stable molecule, and its structure is calculable to high precision. However, studying $\mathrm{H}_2^+$ experimentally presents significant challenges: Standard control methods such as laser cooling are not applicable due to the long lifetimes of its rotational and vibrational states. Here we solve this issue by combining buffer gas cooling to quench the $\mathrm{H}_2^+$ rovibrational excitation with quantum logic operations between $\mathrm{H}_2^+$ and a co-trapped 'helper' ion to control the molecule's hyperfine structure. This enables us to perform pure quantum state preparation, coherent control, and non-destructive readout, which we use to demonstrate high-resolution microwave spectroscopy in the hyperfine structure of $\mathrm{H}_2^+$ with a precision of 2 Hz. Our results pave the way for high precision spectroscopy of $\mathrm{H}_2^+$ in both the microwave and optical domains. Due to the wide applicability of buffer gas cooling, our method provides a general tool for molecular ion species that are hard to control with quantum logic tools alone. |
| title | Quantum control of a single $\mathrm{H}_2^+$ molecular ion |
| topic | Atomic Physics Chemical Physics Quantum Physics |
| url | https://arxiv.org/abs/2409.06495 |