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Indistinguishability of Elementary Systems as a Resource for Quantum Information Processing.
Rosario Lo Franco1,2, Giuseppe Compagno2
1Dipartimento di Energia, Ingegneria dell'Informazione e Modelli Matematici, Università di Palermo, Viale delle Scienze, Edificio 9, 90128 Palermo, Italy.
Identical particles can create entanglement when overlapping, a quantum resource previously unconfirmed. This discovery enables new quantum information processing applications like teleportation.
Area of Science:
- Quantum Information Science
- Quantum Physics
- Quantum Computing
Background:
- Quantum networks rely on identical systems for quantum information processing.
- The potential of particle indistinguishability as a quantum resource is an open research question.
Purpose of the Study:
- To investigate if particle indistinguishability is an exploitable quantum resource.
- To demonstrate the existence and utility of entanglement from independently prepared identical particles.
Main Methods:
- Studying independently prepared identical particles.
- Analyzing spatial overlap of particles.
- Utilizing separated localized measurements to reveal entanglement.
Main Results:
- Operational entanglement is demonstrated to exist between independently prepared identical particles when they spatially overlap.
- This entanglement is proven to be physical and directly exploitable.
- Entanglement can be manifested through separated localized measurements.
Conclusions:
- Particle indistinguishability is confirmed as a utilizable quantum resource.
- The findings pave the way for novel quantum-enhanced applications.
- This research advances the understanding of fundamental quantum mechanics for practical applications.

