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Probing quantum floating phases in Rydberg atom arrays
Jin Zhang1,2,3, Sergio H Cantú4, Fangli Liu5
1Department of Physics and Astronomy, University of Iowa, Iowa City, IA, USA. jzhang91@cqu.edu.cn.
Nature Communications
|January 17, 2025
Summary
Researchers experimentally observed the quantum floating phase in neutral-atom qubits. This incommensurate phase emerges from domain wall proliferation in ordered phases, exhibiting quasi-long-range order.
Area of Science:
- Quantum physics
- Condensed matter physics
- Atomic physics
Background:
- The floating phase is a theoretically predicted incommensurate phase.
- It is hypothesized to exist between crystalline ordered and disordered phases.
- Understanding such phases is key to quantum many-body systems.
Purpose of the Study:
- To experimentally investigate quantum phases in neutral-atom ladder arrays.
- To observe the emergence of the quantum floating phase.
- To analyze the characteristics of this incommensurate phase.
Main Methods:
- Utilized neutral-atom qubits in ladder arrays (up to 92 qubits).
- Performed site-resolved measurements of Rydberg state densities.
- Analyzed Fourier spectra of density-density correlations.
Main Results:
- Experimentally observed the quantum floating phase.
- Identified domain wall proliferation leading to the floating phase.
- Detected signatures of incommensurate wave order via Fourier analysis.
- Observed wave vectors approaching a continuum with increasing system size.
Conclusions:
- The study provides experimental evidence for the quantum floating phase.
- Demonstrated the transition from commensurate order to incommensurate quasi-long-range order.
- Motivates further research into commensurate-incommensurate transitions and non-equilibrium physics.
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