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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Quantum information science

Background:

  • Subradiant states in quantum emitter chains are crucial for photon storage.
  • Storing multiple excitations typically requires delocalized states with challenging fermionic correlations.

Purpose of the Study:

  • To identify a new class of accessible dark states for enhanced quantum storage.
  • To enable high-fidelity preparation and minimally invasive readout of stored quantum information.

Main Methods:

  • Theoretical identification of quasilocalized dark states in finite chains of two-level quantum emitters.
  • Analysis of state properties at specific lattice constants (integer multiples of wavelength).
  • Proposal for experimental implementation using superconducting transmon qubits and coplanar waveguides.

Main Results:

  • Discovery of quasilocalized dark states with up to 50% excitation per qubit.
  • These states emerge at specific lattice constants, simplifying experimental access.
  • Demonstrated potential for high-fidelity preparation and readout with minimal losses.

Conclusions:

  • The identified dark states offer a promising resource for superior photon storage and controlled release.
  • The proposed experimental setup using superconducting qubits is feasible with current technology.
  • This work paves the way for practical quantum memory applications.