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WORLD SCIENTIFIC (EUROPE) eBooks

Sources of Rydberg Atoms

Published May 5, 2026• 0 citations
Publisher
DOI
10.1142/9781800618817_0005

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We propose an efficient free-space scheme to create single photons in a well-defined spatiotemporal mode. To that end, we first prepare a single source atom in an excited Rydberg state. The source atom interacts with a large ensemble of ground-state atoms via a laser-mediated dipole-dipole exchange interaction. Using an adiabatic passage with a chirped laser pulse, we produce a spatially extended spin wave of a single Rydberg excitation in the ensemble, accompanied by the transition of the source atom to another Rydberg state. The collective atomic excitation can then be converted to a propagating optical photon via a coherent coupling field. In contrast to previous approaches, our single-photon source does not rely on the strong coupling of a single emitter to a resonant cavity, nor does it require the heralding of collective excitation or complete Rydberg blockade of multiple excitations in the atomic ensemble.

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Electric Field Analysis in a Cold-Ion Source Using Stark Spectroscopy of Rydberg Atoms

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Cold-atom-based ion sources (CABIS) are a timely example of how laser cooling and trapping can be used in practical applications, such as nanofabrication and microscopy. Unfortunately, Coulomb repulsion between ions can significantly deteriorate CABIS performance. The authors demonstrate that embedded Rydberg atoms can be used for noninvasive, near-real-time measurement of the electric fields between ions in CABIS, and thereby to control Coulomb-induced degradation via feedback. The spectra of different Rydberg states reveal which states are suitable for low- and high-field monitoring, and this work also sheds light on many-body interactions between ultracold ions and neutral atoms.

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Laboratory Studies of Rydberg Atoms

Daniel Kleppner

Astrophysics and space science library•Jan 1, 1980•0 citations
We propose an efficient free-space scheme to create single photons in a well-defined spatiotemporal mode. To that end, we first prepare a single source atom in an excited Rydberg state. The source atom interacts with a large ensemble of ground-state atoms via a laser-mediated dipole-dipole exchange interaction. Using an adiabatic passage with a chirped laser pulse, we produce a spatially extended spin wave of a single Rydberg excitation in the ensemble, accompanied by the transition of the source atom to another Rydberg state. The collective atomic excitation can then be converted to a propagating optical photon via a coherent coupling field. In contrast to previous approaches, our single-photon source does not rely on the strong coupling of a single emitter to a resonant cavity, nor does it require the heralding of collective excitation or complete Rydberg blockade of multiple excitations in the atomic ensemble.
Cold-atom-based ion sources (CABIS) are a timely example of how laser cooling and trapping can be used in practical applications, such as nanofabrication and microscopy. Unfortunately, Coulomb repulsion between ions can significantly deteriorate CABIS performance. The authors demonstrate that embedded Rydberg atoms can be used for noninvasive, near-real-time measurement of the electric fields between ions in CABIS, and thereby to control Coulomb-induced degradation via feedback. The spectra of different Rydberg states reveal which states are suitable for low- and high-field monitoring, and this work also sheds light on many-body interactions between ultracold ions and neutral atoms.