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Related Experiment Video

Updated: May 26, 2026

An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

Published on: June 18, 2020

Entangling macroscopic diamonds at room temperature.

K C Lee¹, M R Sprague, B J Sussman

¹Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, UK.

Science (New York, N.Y.)

|December 7, 2011

Summary

This summary is machine-generated.

Researchers achieved quantum entanglement in the motion of two macroscopic diamonds at room temperature. This demonstrates that entanglement can persist in macroscopic solids under ambient conditions, advancing quantum technologies.

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Last Updated: May 26, 2026

An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

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Area of Science:

Quantum physics
Condensed matter physics
Optics

Background:

Quantum entanglement is typically fragile in macroscopic solids at room temperature due to environmental interactions.
Exploring entanglement in macroscopic systems is crucial for quantum technologies and understanding quantum-classical boundaries.

Purpose of the Study:

To generate and verify motional quantum entanglement between two macroscopic, millimeter-sized diamonds at room temperature.
To investigate the persistence of quantum entanglement in macroscopic solid bodies under ambient conditions.

Main Methods:

Utilizing Raman-scattered photons to measure nonclassical correlations.
Generating entanglement between the vibrational states of two spatially separated diamond samples.

Main Results:

Successfully generated motional entanglement between the two macroscopic diamonds.
Demonstrated positive concurrence with 98% probability, indicating strong nonclassical correlations.
Confirmed the persistence of entanglement in macroscopic solids at room temperature.

Conclusions:

Quantum entanglement can be achieved and maintained in macroscopic solid objects under ambient conditions.
This work opens new avenues for macroscopic quantum technologies and fundamental physics research.