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Quantum Correlations in Nonlocal Boson Sampling.

Farid Shahandeh¹, Austin P Lund¹, Timothy C Ralph¹

¹Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, University of Queensland, St Lucia, Queensland 4072, Australia.

Physical Review Letters

|January 18, 2018

Summary

This summary is machine-generated.

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This study introduces a distributed quantum computation protocol where output correlations defy classical simulation, revealing true quantum correlations via phase-space nonclassicality.

Area of Science:

Quantum Information Science
Quantum Computation
Quantum Correlations

Background:

Understanding quantum correlations is vital for quantum information science.
Investigating how quantum correlations enhance quantum information protocols is key.

Purpose of the Study:

To report a distributed quantum computation protocol with classically correlated input/output states.
To demonstrate that output state correlations are not efficiently simulable classically.
To identify the violation of a specific classicality criterion.

Main Methods:

Development of a distributed quantum computation protocol.
Analysis of correlations between measurement outcomes of output states.
Comparison of classical and quantum simulation efficiencies.

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Application of the phase-space nonclassicality criterion.

Main Results:

The protocol's output state correlations cannot be efficiently simulated classically.
Local measurement outcomes of the output state are efficiently simulable classically.
The protocol violates the phase-space nonclassicality criterion.

Conclusions:

The global phase-space nonclassicality in the output state signifies genuine quantum correlations.
This protocol highlights a specific type of quantum correlation crucial for quantum information.
The findings contribute to distinguishing quantum from classical correlations in computation.