Light-Mediated Collective Atomic Motion in an Optical Lattice Coupled to a Membrane.
Phys Rev Lett
; 120(7): 073602, 2018 Feb 16.
Article
em En
| MEDLINE
| ID: mdl-29542944
ABSTRACT
We observe effects of collective atomic motion in a one-dimensional optical lattice coupled to an optomechanical system. In this hybrid atom-optomechanical system, the lattice light generates a coupling between the lattice atoms as well as between atoms and a micromechanical membrane oscillator. For large atom numbers we observe an instability in the coupled system, resulting in large-amplitude atom-membrane oscillations. We show that this behavior can be explained by light-mediated collective atomic motion in the lattice, which arises for large atom numbers, small atom-light detunings, and asymmetric pumping of the lattice, in agreement with previous theoretical work. The model connects the optomechanical instability to a phase delay in the global atomic backaction onto the lattice light, which we observe in a direct measurement.
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MEDLINE
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En
Ano de publicação:
2018
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Article