Bloch oscillations emerge in continuum interacting quantum gases via strong interactions and are captured by generalized hydrodynamics in the Yang-Gaudin model, with finite-density renormalization from bound states.
Realization of fractional Fermi seas
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abstract
The Pauli exclusion principle is a cornerstone of quantum physics: it governs the structure of matter. Extensions of this principle, such as Haldane's generalized exclusion statistics, predict the existence of exotic quantum states characterized by fractional Fermi seas (FFS), i.e. momentum distributions with uniform but fractional occupancies. Here, we report the experimental realization of fractional Fermi seas in an excited one-dimensional Bose gas prepared through ramping cycles in the interaction strength. The resulting excited yet stable Bose-gas states exhibit Friedel oscillations, smoking-gun signatures of the underlying FFS. The stabilization of these states offers an opportunity to deepen our understanding of quantum thermodynamics in the presence of exotic statistics and paves the way for applications in quantum information and sensing.
years
2026 2verdicts
UNVERDICTED 2representative citing papers
Fermi seas with the same Euler characteristic χ_F possess distinct fine-grained topological structures captured by a new structural resolution factor, which topological superconductors inherit to produce anomalous gapless boundary states.
citing papers explorer
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Generalized Hydrodynamics of Bloch Oscillations in the Absence of a Lattice
Bloch oscillations emerge in continuum interacting quantum gases via strong interactions and are captured by generalized hydrodynamics in the Yang-Gaudin model, with finite-density renormalization from bound states.
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Fine-grained topological structures hidden in Fermi sea
Fermi seas with the same Euler characteristic χ_F possess distinct fine-grained topological structures captured by a new structural resolution factor, which topological superconductors inherit to produce anomalous gapless boundary states.