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Multiparticle interference, Greenberger-Horne-Zeilinger entanglement, and full counting statistics.
1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
Physical Review Letters
|February 21, 2006
Summary
We reveal that Nth-order current correlations in a quantum transport setup show Aharonov-Bohm oscillations, unlike lower orders. This arises from N-particle entanglement, potentially violating Bell inequalities and proving quantum nonlocality.
Area of Science:
- Quantum physics
- Quantum transport phenomena
- Many-body entanglement
Background:
- The Hanbury Brown-Twiss setup is crucial for studying quantum interference.
- Aharonov-Bohm oscillations reveal the influence of magnetic flux on charged particles.
- Understanding multiparticle entanglement is key to quantum information science.
Purpose of the Study:
- To investigate quantum transport in a generalized N-particle Hanbury Brown-Twiss setup.
- To explore the role of magnetic flux on current cross-correlations.
- To demonstrate N-particle quantum nonlocality through multiparticle interference.
Main Methods:
- Theoretical analysis of quantum transport.
- Calculation of Nth-order cumulants of current cross-correlations.
- Investigation of orbital Greenberger-Horne-Zeilinger entanglement.
Main Results:
- The Nth-order cumulant exhibits Aharonov-Bohm oscillations.
- Lower-order cumulants do not show these oscillations.
- Orbital Greenberger-Horne-Zeilinger entanglement is identified as the source of interference.
Conclusions:
- N-particle quantum interference leads to unique Aharonov-Bohm oscillations.
- Violation of generalized Bell inequalities is possible, confirming N-particle quantum nonlocality.
- The study highlights the significance of multiparticle entanglement in quantum transport.