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Area of Science:

  • Condensed Matter Physics
  • Quantum Mechanics

Background:

  • The two-fluid model describes finite-temperature superfluids.
  • A new supersolid phase of matter exhibits mixed classical-superfluid dynamics.

Purpose of the Study:

  • To derive a single-fluid model for rigidly rotating supersolids.
  • To explain the origin of classical and superfluid motion from the wave function's phase.
  • To propose experimental methods for studying supersolid rotation.

Main Methods:

  • Theoretical derivation of a single-fluid model from the two-fluid model.
  • Analysis of the spatially varying phase of the global wave function.
  • Investigation of density-modulated superfluids.

Main Results:

  • A single-fluid model is derived for rotating supersolids.
  • Classical and superfluid dynamics arise from the wave function's phase.
  • The model facilitates the study of partially quantized supercurrents.

Conclusions:

  • The single-fluid model offers a more appropriate description for rotating supersolids.
  • This framework enables the design of experiments to probe unique supersolid rotational behaviors.
  • The findings are applicable to a broader range of density-modulated superfluids.