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Related Experiment Video

Updated: Jun 4, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
05:30

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Quantum networks reveal quantum nonlocality.

Daniel Cavalcanti1, Mafalda L Almeida, Valerio Scarani

  • 1Centre for Quantum Technologies, National University of Singapore, Singapore 117542, Singapore. dcavalcanti@gmail.com

Nature Communications
|February 10, 2011
PubMed
Summary
This summary is machine-generated.

Quantum nonlocality, where quantum systems defy classical explanation, is crucial for quantum technologies. This study reveals nonlocality can be activated in quantum states through network measurements, even if initially local.

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Last Updated: Jun 4, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
05:30

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Area of Science:

  • Quantum Information Science
  • Foundations of Quantum Mechanics
  • Quantum Information Theory

Background:

  • Quantum nonlocality, the inability of classical physics to explain certain composite quantum system measurements, is fundamental to quantum theory.
  • Quantum nonlocality is a key resource for quantum technologies like communication, key distribution, state estimation, and randomness extraction.
  • Determining if a quantum state exhibits nonlocality remains a significant challenge.

Purpose of the Study:

  • To introduce a novel framework for analyzing quantum nonlocality in distributed and measured quantum states within networks.
  • To investigate how network configurations influence the nonlocal properties of quantum states.
  • To explore the conditions under which local quantum states can exhibit nonlocality.

Main Methods:

  • Development of a theoretical framework to study quantum states distributed and measured in network settings.
  • Analysis of one-way entanglement distillable states within this network framework.
  • Investigation of the additivity property of quantum nonlocality as a resource.

Main Results:

  • Demonstration that any one-way entanglement distillable state generates nonlocal correlations within the proposed network framework.
  • Proof that quantum nonlocality is a non-additive resource, meaning it can be activated.
  • Identification of quantum states that are locally defined at the single-copy level but exhibit nonlocality when multiple copies are considered in a network.

Conclusions:

  • Quantum nonlocality is a resource that can be activated, challenging the notion of simple additivity.
  • The emergence of nonlocality is contingent upon the measurement context, particularly in network configurations.
  • This research provides new insights into the nature and utilization of quantum nonlocality in complex quantum systems.