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High-Order Topological Pumping on a Superconducting Quantum Processor.

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Summary
This summary is machine-generated.

Researchers experimentally demonstrated second-order topological pumps using superconducting qubits, creating localized states at corners. This work explores high-order topological phases through dynamical transport, inspiring future research.

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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Topological phases of matter

Background:

  • High-order topological phases feature topological pumping and boundary modes.
  • Second-order topological pumps exhibit unique topological properties.

Purpose of the Study:

  • To experimentally demonstrate second-order topological pumps.
  • To investigate topological properties of high-order topological phases using superconducting qubits.

Main Methods:

  • Utilized a 4x4 square lattice array of 16 superconducting qubits.
  • Prepared initial ground states via adiabatic schemes.
  • Adiabatically modulated the superlattice Bose-Hubbard Hamiltonian.

Main Results:

  • Successfully demonstrated two types of second-order topological pumps.
  • Created four 0-dimensional corner-localized states.
  • Observed evolution to a corner-localized state in a quadrupole configuration.
  • Investigated the robustness of topological pumps against on-site disorder.

Conclusions:

  • Experimental demonstration of second-order topological pumps using superconducting qubits.
  • Provides insights into the dynamical transport picture of high-order topological phases.
  • Inspires further research in topological quantum matter.