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Quantum Zeno subspace and entangled Bose-Einstein condensates.

M Zhang1, L You

  • 1School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.

Physical Review Letters
|December 20, 2003
PubMed
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We propose an efficient method for creating maximally entangled atomic N-Greenberger-Horne-Zeilinger (GHZ) states in spinor condensates using laser fields. Atomic collisions facilitate deterministic entanglement, enabling robust quantum states.

Area of Science:

  • Atomic physics
  • Quantum optics
  • Condensed matter physics

Background:

  • Spinor Bose-Einstein condensates (BECs) offer a platform for quantum information processing.
  • Generating multi-particle entanglement is crucial for quantum technologies.
  • Previous methods for N-GHZ state generation face challenges in efficiency and determinism.

Purpose of the Study:

  • To propose an efficient and deterministic method for generating maximally entangled atomic N-GHZ states.
  • To utilize quantum Zeno subspace dynamics and atomic collisions for entanglement creation.
  • To provide a practical protocol implementable in current experimental setups.

Main Methods:

  • Driving internal state atomic Raman transitions using classical laser fields.
  • Analyzing the dynamics within a quantum Zeno subspace.

Related Experiment Videos

  • Identifying the role of atomic elastic collisions in entanglement generation.

    • Main Results:

    • Demonstration of efficient generation of the maximally entangled atomic N-GHZ state.
    • Identification of atomic elastic collisions as a key mechanism for deterministic entanglement.
    • The proposed method leverages quantum Zeno subspace dynamics.

    Conclusions:

    • The proposed protocol offers an efficient route to deterministic N-GHZ state generation in spinor condensates.
    • The method is experimentally feasible in laboratories investigating ferromagnetic spinor condensates, such as those with 87Rb atoms.
    • This work advances the creation of complex entangled states for quantum applications.