Direct observation of a Feshbach resonance by coincidence detection of ions and electrons in Penning ionization collisions [PDF]
Nature Communications, 2020 Here the authors use ion-electron coincidence imaging method to explore collision dynamics. They observe Feshbach resonance in the Penning ionization collision of argon and excited helium atoms, resulting in singly charged argon ion and ground state ...
Baruch Margulis +2 more
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Experimental realization of a Rydberg optical Feshbach resonance in a quantum many-body system [PDF]
Nature Communications, 2018 Ultracold Rydberg molecules have characteristic properties that can be exploited for quantum control and applications. Here the authors demonstrate a Rydberg optical Feshbach resonance, which is based on ultra-long-range Rydberg molecules.
O. Thomas, C. Lippe, T. Eichert, H. Ott
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Above-threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider [PDF]
Nature Communications, 2017 Studies on energy-dependent scattering of ultracold atoms were previously carried out near zero collision energies. Here, the authors observe a magnetic Feshbach resonance in ultracold Rb collisions for above-threshold energies and their method can also ...
Milena S. J. Horvath +4 more
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Reshaped three-body interactions and the observation of an Efimov state in the continuum [PDF]
Nature CommunicationsEfimov trimers are exotic three-body quantum states that emerge from the different types of three-body continua in the vicinity of two-atom Feshbach resonances. In particular, as the strength of the interaction is decreased to a critical point, an Efimov
Yaakov Yudkin +4 more
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Feshbach hypothesis of high-Tc superconductivity in cuprates [PDF]
Nature CommunicationsResonant interactions associated with the emergence of a bound state constitute one of the cornerstones of modern many-body physics. Here we present a Feshbach perspective on the origin of strong pairing in Fermi-Hubbard type models.
Lukas Homeier +4 more
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High phase-space density gas of NaCs Feshbach molecules
Physical Review Research, 2022 We report on the creation of ultracold gases of bosonic Feshbach molecules of NaCs. The molecules are associated from overlapping gases of Na and Cs using a Feshbach resonance at 864.12(5)G.
Aden Z. Lam +7 more
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Collective excitation of Bose–Einstein condensate of 23Na via high-partial wave Feshbach resonance
New Journal of Physics, 2023 We experimentally observe the collective excitation (called surface-mode excitation) of Bose–Einstein condensate of ^23 Na by ramping the external magnetic field across the high-partial wave magnetic Feshbach resonance corresponding to vary the atomic ...
Zhenlian Shi +7 more
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Observation of magnetic Feshbach resonances between Cs and ^{173}Yb
Physical Review Research, 2022 We report the observation of magnetic Feshbach resonances between ^{173}Yb and ^{133}Cs. In a mixture of Cs atoms prepared in the (f=3,m_{f}=3) state and unpolarized fermionic ^{173}Yb, we observe resonant atom loss due to two sets of magnetic Feshbach ...
Tobias Franzen +6 more
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Feshbach resonances with large background scattering length: interplay with open-channel resonances [PDF]
, 2004 Feshbach resonances are commonly described by a single-resonance Feshbach model, and open-channel resonances are not taken into account explicitly. However, an open-channel resonance near threshold limits the range of validity of this model.
Kokkelmans, S. J. J. M. F. +3 more
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Atoms, 2019 Recent observations on resonance states of the positronium negative ion (Ps−) in the laboratory created huge interest in terms of the calculation of the resonance parameters of the simple three-lepton system.
Sabyasachi Kar, Yew Kam Ho
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