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Entangling macroscopic oscillators exploiting radiation pressure.

Stefano Mancini1, Vittorio Giovannetti, David Vitali

  • 1INFM, Dipartimento di Fisica, Università di Milano, Via Celoria 16, I-20133 Milano, Italy.

Physical Review Letters
|March 23, 2002
PubMed
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Radiation pressure can entangle macroscopic oscillators, like mirrors, with current technology. This entanglement is robust against thermal noise and detectable with standard optomechanical equipment.

Area of Science:

  • Optomechanics
  • Quantum physics
  • Macroscopic quantum phenomena

Background:

  • Quantum entanglement is typically observed in microscopic systems.
  • Controlling macroscopic objects at the quantum level presents significant challenges.
  • Optomechanical systems offer a promising platform for exploring macroscopic quantum effects.

Purpose of the Study:

  • To investigate the feasibility of using radiation pressure for macroscopic entanglement.
  • To develop a new criterion for verifying entanglement in macroscopic systems.
  • To assess the robustness of radiation-induced entanglement against environmental noise.

Main Methods:

  • Theoretical analysis of radiation pressure interactions in optomechanical systems.
  • Development and application of a novel sufficient criterion for entanglement.

Related Experiment Videos

  • Modeling the effects of thermal noise on the entangled state.

    • Main Results:

    • Radiation pressure can indeed be used to entangle macroscopic oscillators (e.g., movable mirrors).
    • A new, practical criterion for confirming entanglement has been established.
    • The resulting entanglement demonstrates robustness against thermal noise.

    Conclusions:

    • Macroscopic entanglement via radiation pressure is achievable with existing technology.
    • The developed entanglement criterion and noise robustness are significant advancements.
    • Optomechanical readout apparatus can effectively detect the signature of this entanglement.