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Deterministic Generation of Photonic Entangled States Using Decoherence-Free Subspaces.

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Summary
This summary is machine-generated.

Collective states of matter enable deterministic generation of quantum light states using a minimal three-emitter model. This approach facilitates quantum information technologies by creating entangled photonic states through controlled light-matter interactions.

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Condensed matter physics

Background:

  • Quantum states of light are crucial for quantum information technologies.
  • Deterministic generation of these states is a significant challenge.
  • Collective phenomena in matter offer potential resources for quantum control.

Purpose of the Study:

  • To propose and model a system for the deterministic generation of quantum states of light.
  • To utilize collective states of matter as a resource for quantum information processing.
  • To demonstrate the generation of specific entangled photonic states.

Main Methods:

  • A minimal model of three emitters coupled to a terminated one-dimensional waveguide (half-waveguide).
  • Exploiting photon-mediated interactions to create bright and dark states.
  • Utilizing local driving and frequency control for quantum gates within a decoherence-free subspace.
  • Coupling emitters to bright states for photon emission and light-matter gates.

Main Results:

  • Emergence of bright and dark states from emitter interactions.
  • Dark states form a decoherence-free subspace, preventing dissipation.
  • Arbitrary quantum gates are achievable within the decoherence-free subspace.
  • Demonstration of generating entangled photonic states (GHZ, cluster states) via sequential gates.

Conclusions:

  • Collective states of matter provide a robust platform for deterministic quantum light generation.
  • The proposed system enables high-fidelity quantum gates and the creation of complex entangled states.
  • This work advances the development of quantum information technologies through novel light-matter interfaces.