AI Article Synopsis
- The first detection of a Higgs-type amplitude mode has been achieved using Bragg spectroscopy in a strongly interacting condensate of ultracold atoms situated in an optical lattice.
- By comparing experimental results with a time-dependent bosonic Gutzwiller calculation, researchers were able to identify the amplitude mode accurately, demonstrating detection capabilities that exceed the linear response regime.
- A noticeable shift in the resonance frequencies of both sound and amplitude modes was observed, attributed to the finite intensity of the Bragg beam used in the experiments.
Article Abstract
We report the first detection of the Higgs-type amplitude mode using Bragg spectroscopy in a strongly interacting condensate of ultracold atoms in an optical lattice. By the comparison of our experimental data with a spatially resolved, time-dependent bosonic Gutzwiller calculation, we obtain good quantitative agreement. This allows for a clear identification of the amplitude mode, showing that it can be detected with full momentum resolution by going beyond the linear response regime. A systematic shift of the sound and amplitude modes' resonance frequencies due to the finite Bragg beam intensity is observed.
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| http://dx.doi.org/10.1103/PhysRevLett.106.205303 | DOI Listing |
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