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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Entangling the spatial properties of laser beams
Katherine Wagner1, Jiri Janousek, Vincent Delaubert
1Australian Research Council Centre of Excellence for Quantum-Atom Optics, Australian National University, Canberra ACT 0200, Australia.
Science (New York, N.Y.)
|July 26, 2008
Summary
Researchers demonstrate macroscopic quantum entanglement of light beams, overcoming fundamental limits in optical measurements. This breakthrough advances quantum metrology and interferometry using spatial entanglement.
Area of Science:
- Quantum Physics
- Quantum Optics
- Optical Metrology
Background:
- Position and momentum entanglement are foundational in quantum mechanics.
- Optical metrology and interferometry face accuracy limits due to the Heisenberg uncertainty principle.
- Spatial entanglement of optical beams offers a potential solution to surpass these classical limitations.
Purpose of the Study:
- To extend position and momentum entanglement to bright optical beams.
- To demonstrate the feasibility of using spatial entanglement for enhanced optical measurements.
- To quantify the quality of entanglement for practical applications.
Main Methods:
- Utilizing bright optical beams for position and momentum entanglement.
- Implementing techniques based on spatial entanglement.
- Quantifying entanglement using inseparability and the Einstein-Podolsky-Rosen criterion.
Main Results:
- Achieved a normalized inseparability value of 0.51.
- Obtained a normalized Einstein-Podolsky-Rosen criterion value of 0.62.
- Demonstrated high-quality macroscopic quantum entanglement in optical beams.
Conclusions:
- Conclusively demonstrated macroscopic position and momentum quantum entanglement in an optical system.
- Confirmed the availability of resources for spatial multimode quantum protocols.
- Paved the way for overcoming uncertainty principle limitations in optical metrology and interferometry.
