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Photon Blockade with Ground-State Neutral Atoms.

A Cidrim1, T S do Espirito Santo2, J Schachenmayer3

  • 1Departamento de Física, Universidade Federal de São Carlos, Rod. Washington Luís, km 235-SP-310, 13565-905 São Carlos, SP, Brazil.

Physical Review Letters
|August 29, 2020
PubMed
Summary
This summary is machine-generated.

Photon blockade is achieved in neutral atom ensembles using dipole-dipole interactions. This enables quantum information protocols by controlling light-atom interactions with high precision.

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Quantum information science

Background:

  • Photon blockade is crucial for quantum information processing, enabling the control of single photons.
  • Neutral atom ensembles offer a promising platform for quantum technologies due to their scalability and long coherence times.

Purpose of the Study:

  • To demonstrate photon blockade in subwavelength ensembles of neutral atoms.
  • To explore the use of induced dipole-dipole interactions for enhanced quantum control.
  • To propose a novel protocol for quantum information processing.

Main Methods:

  • Utilizing induced dipole-dipole interactions in subwavelength ensembles of two-level, ground-state neutral atoms.
  • Engineering the energy shift of the single-excitation, superradiant state to create an effective two-level system.
  • Employing a coherent pump to induce Rabi oscillations between the ground and collective bright states.

Main Results:

  • Achieved photon blockade through engineered dipole-dipole interactions.
  • Demonstrated control over single-excitation states shared among N atoms.
  • Established an effective two-level system for precise light-atom interaction.

Conclusions:

  • The proposed protocol offers a promising avenue for quantum information protocols.
  • The use of long-lived clock transitions enhances robustness against environmental noise.
  • Subwavelength lattices provide new experimental possibilities for quantum computing and simulation.