期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.083401
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资金
- AFOSR [FA9550-17-1-0366]
- NSF [1301773, 1600059]
- Robert A, Welch Foundation [C-0734, C-1844]
- FWF(Austria) [FWF-SFB041, FWF-SFB049]
- NSF through a grant for the Institute for Theoretical Atomic, Molecular, and Optical Physics at Harvard University
- Smithsonian Astrophysical Observatory
- ETH Pauli Center for Theoretical Studies
- Harvard-MIT CUA
- AFOSR Quantum Simulation MURI
- ARO-MURI on Atomtronics
- Walter Haefner Foundation
- ETH Foundation
- Yale University
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1308435] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1301773] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1600059] Funding Source: National Science Foundation
We report spectroscopic observation of Rydberg polarons in an atomic Bose gas. Polarons are created by excitation of Rydberg atoms as impurities in a strontium Bose-Einstein condensate. They are distinguished from previously studied polarons by macroscopic occupation of bound molecular states that arise from scattering of the weakly bound Rydberg electron from ground-state atoms. The absence of a p-wave resonance in the low-energy electron-atom scattering in Sr introduces a universal behavior in the Rydberg spectral line shape and in scaling of the spectral width (narrowing) with the Rydberg principal quantum number, n. Spectral features are described with a functional determinant approach (FDA) that solves an extended Frohlich Hamiltonian for a mobile impurity in a Bose gas. Excited states of polyatomic Rydberg molecules (trimers, tetrameters, and pentamers) are experimentally resolved and accurately reproduced with a FDA.
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