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Updated: May 12, 2026
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Experimental Verification of Multicopy Activation of Genuine Multipartite Entanglement
Robert Stárek1, Tim Gollerthan2, Olga Leskovjanová1
1Palacký University, Department of Optics, 17. listopadu 1192/12, 779 00 Olomouc, Czech Republic.
Physical Review Letters
|May 11, 2026
Summary
Genuine multipartite entanglement (GME) can be activated from multiple copies of less complex quantum states. This study experimentally demonstrates GME activation from two biseparable three-qubit states using trapped ions.
Area of Science:
- Quantum Information Processing
- Quantum Many-Body Systems
- Quantum Communication
Background:
- Genuine multipartite entanglement (GME) is crucial for quantum information processing, enabling tasks beyond classical capabilities.
- GME represents correlations stronger than biseparable states, which are mixtures of partially separable states.
- Previous theoretical work suggested GME activation from multiple copies of biseparable states.
Purpose of the Study:
- To experimentally demonstrate the activation of genuine multipartite entanglement (GME) from multiple copies of biseparable quantum states.
- To provide unambiguous evidence of GME activation in a physical quantum system.
- To explore the potential of multipartite entanglement activation for quantum information tasks.
Main Methods:
- Utilized a trapped-ion quantum processor to create and manipulate three-qubit states.
- Prepared two copies of a specific biseparable three-qubit state.
- Implemented quantum state tomography and entanglement witnesses to verify the presence of GME in the combined state.
Main Results:
- Successfully demonstrated the activation of genuine multipartite entanglement (GME) from two copies of a biseparable three-qubit state.
- Provided unambiguous experimental evidence of GME activation, confirming theoretical predictions.
- Showcased the feasibility of generating highly entangled states from less entangled precursors.
Conclusions:
- The experimental activation of GME from biseparable states challenges conventional understanding of quantum resources.
- This work highlights the potential of using multiple copies of quantum states to achieve enhanced entanglement.
- The findings pave the way for novel quantum communication protocols and advanced quantum computing applications.
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