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Engineering Excited-State Interactions at Ultracold Temperatures
Mills, M Puri, P Li, M Schowalter, SJ Dunning, A Schneider, C Kotochigova, S Hudson, ER
Mills, M
Puri, P
Li, M
Schowalter, SJ
Dunning, A
Schneider, C
Kotochigova, S
Hudson, ER
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Pre-print
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2019-06-14
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10.1103/PhysRevLett.122.233401
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© 2019 American Physical Society. Using a recently developed method for precisely controlling collision energy, we observe a dramatic suppression of inelastic collisions between an atom and ion (Ca+Yb+) at low collision energy. This suppression, which is expected to be a universal phenomenon, arises when the spontaneous emission lifetime of the excited state is comparable to or shorter than the collision complex lifetime. We develop a technique to remove this suppression and engineer excited-state interactions. By dressing the system with a strong catalyst laser, a significant fraction of the collision complexes can be excited at a specified atom-ion separation. This technique allows excited-state collisions to be studied, even at ultracold temperature, and provides a general method for engineering ultracold excited-state interactions.
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Physical Review Letters
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