Vibrationally highly excited trilobite molecules stabilized by non-adiabatic coupling
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arXiv
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| Format: | Preprint |
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2025
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| author | Srikumar, Rohan Exner, Markus Blättner, Richard Schmelcher, Peter Eiles, Matthew T. Ott, Herwig |
| author_facet | Srikumar, Rohan Exner, Markus Blättner, Richard Schmelcher, Peter Eiles, Matthew T. Ott, Herwig |
| contents | We report on the observation of highly excited ($ν\sim 100)$ vibrational states of a trilobite ultralong-range Rydberg molecule in $^{87}$Rb. These states manifest spectroscopically in a regularly spaced series of peaks red-detuned from the $25f_{7/2}$ dissociation threshold. The existence and observed stability of these states requires the almost complete suppression of the adiabatic decay pathway induced by the $P$-wave shape resonance of Rb. This stabilization is predicted to occur only for certain Rydberg levels where the avoided crossing between trilobite and $P$-wave dominated butterfly potential energy curves nearly vanishes, allowing the vibrational states to diabatically traverse the crossing with almost unit probability. This is the first direct measurement of beyond-Born-Oppenheimer physics in long-range Rydberg molecules, and paves the way for future experiments to access and manipulate wavepackets formed from high-lying vibrational states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_15509 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Vibrationally highly excited trilobite molecules stabilized by non-adiabatic coupling Srikumar, Rohan Exner, Markus Blättner, Richard Schmelcher, Peter Eiles, Matthew T. Ott, Herwig Atomic Physics Quantum Physics We report on the observation of highly excited ($ν\sim 100)$ vibrational states of a trilobite ultralong-range Rydberg molecule in $^{87}$Rb. These states manifest spectroscopically in a regularly spaced series of peaks red-detuned from the $25f_{7/2}$ dissociation threshold. The existence and observed stability of these states requires the almost complete suppression of the adiabatic decay pathway induced by the $P$-wave shape resonance of Rb. This stabilization is predicted to occur only for certain Rydberg levels where the avoided crossing between trilobite and $P$-wave dominated butterfly potential energy curves nearly vanishes, allowing the vibrational states to diabatically traverse the crossing with almost unit probability. This is the first direct measurement of beyond-Born-Oppenheimer physics in long-range Rydberg molecules, and paves the way for future experiments to access and manipulate wavepackets formed from high-lying vibrational states. |
| title | Vibrationally highly excited trilobite molecules stabilized by non-adiabatic coupling |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2502.15509 |