Ultracold LiCr: a new pathway to quantum gases of paramagnetic polar molecules
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909301846573056 |
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| author | Finelli, Stefano Ciamei, Alessio Restivo, Beatrice Schemmer, Maximilian Cosco, Antonio Inguscio, Massimo Trenkwalder, Andreas Zaremba-Kopczyk, Klaudia Gronowski, Marcin Tomza, Michal Zaccanti, Matteo |
| author_facet | Finelli, Stefano Ciamei, Alessio Restivo, Beatrice Schemmer, Maximilian Cosco, Antonio Inguscio, Massimo Trenkwalder, Andreas Zaremba-Kopczyk, Klaudia Gronowski, Marcin Tomza, Michal Zaccanti, Matteo |
| contents | Quantum gases of doubly-polar molecules represent appealing frameworks for a variety of cross-disciplinary applications, encompassing quantum simulation and computation, controlled quantum chemistry and precision measurements. Through a joint experimental and theoretical study, here we explore a novel class of ultracold paramagnetic polar molecules combining lithium alkali and chromium transition metal elements. Focusing on the specific bosonic isotopologue $^{6}$Li$^{53}$Cr, leveraging on the Fermi statistics of the parent atomic mixture and on suitable Feshbach resonances recently discovered, we produce up to $50\times10^3$ ultracold LiCr molecules at peak phase-space densities exceeding 0.1, prepared within the least-bound rotationless level of the LiCr electronic $sextet$ ground state $X^6Σ^+$. We thoroughly characterize the molecular gas, demonstrating the paramagnetic nature of LiCr dimers and the precise control of their quantum state. We investigate their stability against inelastic processes and identify a parameter region where pure LiCr samples exhibit lifetimes exceeding 0.2 s. Parallel to this, we employ state-of-the-art quantum-chemical calculations to predict the properties of LiCr ground and excited electronic states. We identify efficient paths to coherently transfer weakly-bound LiCr dimers to their absolute ground state, to deliver ultracold gases of doubly-polar molecules with significant electric (3.3 D) and magnetic ($5\,μ_\text{B}$) dipole moments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_08337 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultracold LiCr: a new pathway to quantum gases of paramagnetic polar molecules Finelli, Stefano Ciamei, Alessio Restivo, Beatrice Schemmer, Maximilian Cosco, Antonio Inguscio, Massimo Trenkwalder, Andreas Zaremba-Kopczyk, Klaudia Gronowski, Marcin Tomza, Michal Zaccanti, Matteo Quantum Gases Atomic Physics Quantum gases of doubly-polar molecules represent appealing frameworks for a variety of cross-disciplinary applications, encompassing quantum simulation and computation, controlled quantum chemistry and precision measurements. Through a joint experimental and theoretical study, here we explore a novel class of ultracold paramagnetic polar molecules combining lithium alkali and chromium transition metal elements. Focusing on the specific bosonic isotopologue $^{6}$Li$^{53}$Cr, leveraging on the Fermi statistics of the parent atomic mixture and on suitable Feshbach resonances recently discovered, we produce up to $50\times10^3$ ultracold LiCr molecules at peak phase-space densities exceeding 0.1, prepared within the least-bound rotationless level of the LiCr electronic $sextet$ ground state $X^6Σ^+$. We thoroughly characterize the molecular gas, demonstrating the paramagnetic nature of LiCr dimers and the precise control of their quantum state. We investigate their stability against inelastic processes and identify a parameter region where pure LiCr samples exhibit lifetimes exceeding 0.2 s. Parallel to this, we employ state-of-the-art quantum-chemical calculations to predict the properties of LiCr ground and excited electronic states. We identify efficient paths to coherently transfer weakly-bound LiCr dimers to their absolute ground state, to deliver ultracold gases of doubly-polar molecules with significant electric (3.3 D) and magnetic ($5\,μ_\text{B}$) dipole moments. |
| title | Ultracold LiCr: a new pathway to quantum gases of paramagnetic polar molecules |
| topic | Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2402.08337 |