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Realizing the multiparticle Hanbury Brown-Twiss interferometer using nitrogen-vacancy centers in diamond crystals
Physical Review Letters
|March 10, 2012
Summary
Researchers show that multiparticle Hanbury Brown-Twiss interferometry is possible in nitrogen-vacancy centers. This quantum optics phenomenon appears in the Nth-order correlation function for N particles, enhancing with entanglement.
Area of Science:
- Quantum optics
- Quantum information science
- Solid-state physics
Background:
- The Hanbury Brown-Twiss (HBT) effect traditionally describes intensity correlations in classical and quantum optics.
- Realizing multiparticle quantum interference in solid-state systems is crucial for quantum technologies.
Purpose of the Study:
- To demonstrate the feasibility of multiparticle Hanbury Brown-Twiss interferometry in a network of nitrogen-vacancy (NV) centers.
- To explore methods for enhancing quantum interference effects in such systems.
Main Methods:
- Utilizing a network of nitrogen-vacancy centers as a quantum platform.
- Analyzing the Nth-order intensity correlation function for an N-particle system.
- Implementing a postselection process involving multipartite Greenberger-Horne-Zeilinger (GHZ) entanglement.
- Testing entanglement properties using the Svetlichny inequality.
Main Results:
- The Nth-order intensity correlation function uniquely manifests the interference effect for N particles in the NV center network.
- A postselection technique successfully enhances the observed interference.
- Generation and verification of multipartite GHZ entanglement were achieved.
- The Svetlichny inequality confirmed the presence of genuine multipartite entanglement.
Conclusions:
- Nitrogen-vacancy centers provide a viable platform for realizing multiparticle HBT interferometry.
- Quantum interference effects in multiparticle systems can be amplified using entanglement-based postselection.
- This work paves the way for advanced quantum sensing and information processing applications using NV centers.
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