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Related Experiment Videos

Entangled light from white noise.

M B Plenio1, S F Huelga

  • 1Quantum Optics and Laser Science Group, Blackett Laboratory, Imperial College of Science, Technology and Medicine, London, SW7 2BW, United Kingdom.

Physical Review Letters
|May 15, 2002
PubMed
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This study shows how entanglement between optical cavities can be generated using only incoherent noise. Maximum entanglement occurs at intermediate noise levels, demonstrating a stochastic resonance effect.

Area of Science:

  • Quantum optics
  • Quantum information processing
  • Atomic physics

Background:

  • Entanglement is a key resource in quantum information processing.
  • Generating entanglement often requires coherent control methods.
  • The role of noise in quantum systems is typically considered detrimental.

Purpose of the Study:

  • To investigate the generation of entanglement between two optical cavities coupled to a single atom.
  • To explore the influence of an external white noise field on this entanglement.
  • To understand the potential for noise to play a constructive role in quantum information tasks.

Main Methods:

  • Modeling an atom interacting with two distinct leaky optical cavities.
  • Driving the system with an external optical white noise field.

Related Experiment Videos

  • Analyzing the conditions for entanglement generation between the cavity light fields.

    • Main Results:

    • Entanglement between the optical cavity light fields arises from the interaction.
    • Maximum entanglement is observed at intermediate values of cavity damping rates and white noise intensity.
    • Entanglement vanishes for very low or very high damping rates and noise intensities, showing stochastic-resonancelike behavior.

    Conclusions:

    • Entanglement can be generated through exclusively incoherent means (noise).
    • Noise can play a constructive role in quantum information processing tasks.
    • This work highlights a novel pathway for creating entangled quantum states.