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Stabilized entanglement of massive mechanical oscillators
C F Ockeloen-Korppi1, E Damskägg1, J-M Pirkkalainen1
1Department of Applied Physics, Aalto University, Aalto, Finland.
Nature
|April 27, 2018
Summary
Scientists achieved quantum entanglement for massive macroscopic objects, specifically two micromechanical oscillators. This breakthrough extends quantum phenomena to larger scales, paving the way for new quantum technologies and fundamental physics research.
Area of Science:
- Quantum Physics
- Macroscopic Quantum Phenomena
- Quantum Technologies
Background:
- Quantum entanglement links systems regardless of distance, crucial for quantum technologies.
- Entanglement demonstrated in microscopic systems (photons, ions, spins) and devices.
- Entangling macroscopic objects' motion is challenging due to environmental vulnerability.
Purpose of the Study:
- To experimentally demonstrate entanglement of the center-of-mass motion of macroscopic objects.
- To overcome environmental decoherence challenges in macroscopic entanglement.
Main Methods:
- Utilized two massive micromechanical oscillators (approx. 10^12 atoms each).
- Coupled oscillators to a microwave-frequency electromagnetic cavity.
- Inferred steady-state entanglement via correlated mechanical fluctuations and cavity microwave analysis.
Main Results:
- Successfully created and stabilized entanglement of the center-of-mass motion for macroscopic oscillators.
- Demonstrated entanglement in the steady state using indirect measurement techniques.
Conclusions:
- Qualitatively extended the range of physical systems exhibiting quantum entanglement.
- Implications for quantum information processing, precision measurements, and fundamental physics.
- Opens new avenues for exploring quantum mechanics at larger scales.
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