Coherent and Dephasing Spectroscopy for Single-Impurity Probing of an Ultracold Bath
Adam D, Bouton Q, Nettersheim J, Burgardt S, Widera A (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 129
Article Number: 120404
Journal Issue: 12
DOI: 10.1103/PhysRevLett.129.120404
Abstract
We report Ramsey spectroscopy on the clock states of individual Cs impurities immersed in an ultracold Rb bath. We record both the interaction-driven phase evolution and the decay of fringe contrast of the Ramsey interference signal to obtain information about bath density or temperature nondestructively. The Ramsey fringe is modified by a differential shift of the collisional energy when the two Cs states superposed interact with the Rb bath. This differential shift is directly affected by the mean gas density and the details of the Rb-Cs interspecies scattering length, affecting the phase evolution and the contrast of the Ramsey signal. Additionally, we enhance the temperature dependence of the phase shift preparing the system close to a low-magnetic-field Feshbach resonance where the s-wave scattering length is significantly affected by the collisional (kinetic) energy. Analyzing coherent phase evolution and decay of the Ramsey fringe contrast, we probe the Rb cloud's density and temperature. Our results point at using individual impurity atoms as nondestructive quantum probes in complex quantum systems.
Involved external institutions
Germany (DE)How to cite
APA:
Adam, D., Bouton, Q., Nettersheim, J., Burgardt, S., & Widera, A. (2022). Coherent and Dephasing Spectroscopy for Single-Impurity Probing of an Ultracold Bath. Physical Review Letters, 129(12). https://doi.org/10.1103/PhysRevLett.129.120404
MLA:
Adam, Daniel, et al. "Coherent and Dephasing Spectroscopy for Single-Impurity Probing of an Ultracold Bath." Physical Review Letters 129.12 (2022).
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