4.6 Review

Bimolecular Chemistry in the Ultracold Regime

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Detection of Long-Lived Complexes in Ultracold Atom-Molecule Collisions

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Summary: A thorough understanding of molecular scattering in the ultralow temperature regime is crucial for realizing long coherence times and enabling tunable interactions in molecular gases. The study investigates collisional loss in an ultracold mixture, showing that a 1064 nm laser can efficiently deplete the complex population via photoexcitation.

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Nuclear spin conservation enables state-to-state control of ultracold molecular reactions

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Summary: By leveraging the conservation of nuclear spins throughout the reaction process, control over the product state of bimolecular reactions has been demonstrated by manipulating the reactants' nuclear spins. This technique allows for changing the occupation of product states by altering the coherent superposition of initial nuclear spin states, enabling control of reaction inputs and outputs with quantum-state resolution. The techniques demonstrated here open up possibilities to study quantum entanglement between reaction products and ultracold reaction dynamics at the state-to-state level.

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Mechanistic Insights into Ultracold Chemical Reactions under the Control of the Geometric Phase

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Summary: Ultracold chemical reactions involve collisions at temperatures near absolute zero, which can lead to significant reactivity in molecular systems with barrierless and exoergic reaction pathways. The study reveals that the geometric phase can significantly alter the outcome of ultracold reactions, and quantum control techniques may be effective in controlling reactivity.

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Probing Photoinduced Two-Body Loss of Ultracold Nonreactive Bosonic 23Na87Rb and 23Na39K Molecules

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Quantum reactive scattering calculations for the cold and ultracold Li + LiNa → Li2 + Na reaction

Brian K. Kendrick

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Summary: Chemical reactions at ultralow temperatures provide an ideal platform for testing quantum chemistry and scattering theories. By reporting the full product state distribution for the reaction 2KRb -> K-2 + Rb-2, this study demonstrates experimental control over initial quantum degrees of freedom and reveals deviations from statistical theory in the state-pairs observed. The completeness of the measurements sets a benchmark for advancing quantum dynamics calculations.

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Observation of resonant dipolar collisions in ultracold 23Na 87Rb rotational mixtures

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Summary: Our investigation focuses on dipolar collisions in rotational state mixtures of ultracold bosonic (NaRb)-Na-23-Rb-87 molecules, where the resonant dipole-dipole interaction is found to significantly modify collisions even in the absence of an electric field. We reveal this effect by measuring enhanced two-body loss rate constants in the mixtures, and demonstrate that the dipolar interaction strength can be tuned with microwave spectroscopy. Additionally, observations of contributions from hyperfine changing collisions are made when the rotational level combination is not of the lowest energy.

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Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing

Zoe Z. Yan et al.

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Advances and New Challenges to Bimolecular Reaction Dynamics Theory

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Low-energy collisions between carbon atoms and oxygen molecules in a magnetic trap

Michael Karpov et al.

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Ultracold Gas of Bosonic 23Na39K Ground-State Molecules

Kai K. Voges et al.

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Direct laser cooling of a symmetric top molecule

Debayan Mitra et al.

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Xiaodong He et al.

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Dipolar evaporation of reactive molecules to below the Fermi temperature

Giacomo Valtolina et al.

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Kyle Matsuda et al.

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Sticky collisions of ultracold RbCs molecules

Philip D. Gregory et al.

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Yair Segev et al.

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Photoinduced Two-Body Loss of Ultracold Molecules

Arthur Christianen et al.

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An optical tweezer array of ultracold molecules

Loic Anderegg et al.

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Direct observation of bimolecular reactions of ultracold KRb molecules

M. -G. Hu et al.

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Laser cooling of optically trapped molecules

Loic Anderegg et al.

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Magnetic Trapping of an Ultracold Gas of Polar Molecules

D. J. McCarron et al.

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Collisions of ultracold 23Na 87Rb molecules with controlled chemical reactivities

Xin Ye et al.

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Timur M. Rvachov et al.

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Xing Wu et al.

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Creation of an Ultracold Gas of Ground-State Dipolar 23Na87Rb Molecules

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Coherent Microwave Control of Ultracold 23Na40K Molecules

Sebastian A. Will et al.

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B. J. Bjork et al.

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Justin Jankunas et al.

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Steven A. Moses et al.

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B. K. Kendrick et al.

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Caroline C. Womack et al.

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Etay Lavert-Ofir et al.

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Statistical product distributions for ultracold reactions in external fields

Maykel L. Gonzalez-Martinez et al.

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Laser cooling and slowing of CaF molecules

V. Zhelyazkova et al.

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Creation of Ultracold 87Rb133Cs Molecules in the Rovibrational Ground State

Peter K. Molony et al.

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Ultracold Dense Samples of Dipolar RbCs Molecules in the Rovibrational and Hyperfine Ground State

Tetsu Takekoshi et al.

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J. Baron et al.

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Scattering of ultracold molecules in the highly resonant regime

Michael Mayle et al.

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Infrared Absorption Spectrum of the Simplest Criegee Intermediate CH2OO

Yu-Te Su et al.

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Goulven Quemener et al.

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Quantum dynamics of complex-forming bimolecular reactions

H. Guo

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Jason N. Byrd et al.

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Ian W.M. Smith

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Stark-induced adiabatic Raman passage for preparing polarized molecules

Nandini Mukherjee et al.

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Controlling the quantum stereodynamics of ultracold bimolecular reactions

M. H. G. de Miranda et al.

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Physics and Chemistry of Cold Molecules

Olivier Dulieu et al.

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Laser cooling of a diatomic molecule

E. S. Shuman et al.

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Dipolar collisions of polar molecules in the quantum regime

K. -K. Ni et al.

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An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice

Johann G. Danzl et al.

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Reactions of ultracold alkali-metal dimers

Piotr S. Zuchowski et al.

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Product-state control of bi-alkali-metal chemical reactions

Edmund R. Meyer et al.

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Feshbach resonances in ultracold gases

Cheng Chin et al.

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Quantum-State Controlled Chemical Reactions of Ultracold Potassium-Rubidium Molecules

S. Ospelkaus et al.

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Wave-Packet and Coherent Control Dynamics

Kenji Ohmori

ANNUAL REVIEW OF PHYSICAL CHEMISTRY (2009)

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Martin T. Bell et al.

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A dipolar gas of ultracold molecules

K. -K. Ni et al.

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Stable Topological Superfluid Phase of Ultracold Polar Fermionic Molecules

N. R. Cooper et al.

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O. Dulieu et al.

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F. Lang et al.

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Theoretical studies on bimolecular reaction dynamics

David C. Clary

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K. -K. Ni et al.

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Brian C. Sawyer et al.

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Philippe F. Weck et al.

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H Sato

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