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Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
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Deterministic generation of two-dimensional multi-photon cluster states.

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This summary is machine-generated.

Researchers developed a device to create large-scale entangled microwave photonic states. This breakthrough advances quantum communication, quantum computing, and quantum metrology.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Superconducting Quantum Systems

Background:

  • Multidimensional cluster states are crucial for quantum technologies like communication and computing.
  • Generating large-scale entangled photonic states is a significant challenge in quantum information science.

Purpose of the Study:

  • To present a novel device for emitting large-scale entangled microwave photonic states.
  • To demonstrate the generation of 2D cluster states in a ladder architecture.

Main Methods:

  • Utilized coupled superconducting transmon qubits tuneably coupled to a common waveguide.
  • Employed interleaving two-qubit gates with controlled photon emission.
  • Generated time- and frequency-multiplexed cluster states of itinerant microwave photons.

Main Results:

  • Achieved fidelities above 0.50 for cluster states with up to eight qubits.
  • Observed nonzero localizable entanglement for states involving up to 16 qubits.
  • Demonstrated a device capable of generating 2D grids of entangled microwave photons.

Conclusions:

  • The developed device architecture is effective for generating multidimensional cluster states.
  • This architecture is adaptable for creating various tensor network states and is scalable.
  • The findings pave the way for enhanced quantum communication and computation.