期刊
SCIENCE
卷 356, 期 6341, 页码 945-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aah6616
关键词
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资金
- CNRS [PICS06738]
- Harvard-MIT Center for Ultracold Atoms
- NSF [DMR-1308435]
- Air Force Office of Scientific Research Quantum Simulation Multidisciplinary University Research Initiative
- Humboldt Foundation
- Max Planck Institute for Quantum Optics
- European Research Council [278417]
- Austrian Science Foundation (FWF) [I1789-N20]
- Technical University of Munich-Institute for Advanced Study
- German Excellence Initiative
- European Union [291763]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1308435] Funding Source: National Science Foundation
- European Research Council (ERC) [278417] Funding Source: European Research Council (ERC)
The interplay of strong quantum correlations and far-from-equilibrium conditions can give rise to striking dynamical phenomena. We experimentally investigated the quantum motion of an impurity atom immersed in a strongly interacting one-dimensional Bose liquid and subject to an external force. We found that the momentum distribution of the impurity exhibits characteristic Bragg reflections at the edge of an emergent Brillouin zone. Although Bragg reflections are typically associated with lattice structures, in our strongly correlated quantum liquid they result from the interplay of short-range crystalline order and kinematic constraints on the many-body scattering processes in the one-dimensional system. As a consequence, the impurity exhibits periodic dynamics, reminiscent of Bloch oscillations, although the quantum liquid is translationally invariant. Our observations are supported by large-scale numerical simulations.
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