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Observation of Genuine Three-Photon Interference.
Sascha Agne1, Thomas Kauten2, Jeongwan Jin1
1Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
Physical Review Letters
|April 29, 2017
Summary
Researchers demonstrated three-photon interference using Greenberger-Horne-Zeilinger (GHZ) states in a novel interferometer. This experiment achieves high-visibility multiparticle quantum interference, advancing quantum information science.
Area of Science:
- Quantum mechanics
- Quantum information science
- Multiparticle quantum interference
Background:
- Multiparticle quantum interference is crucial for quantum information and fundamental physics.
- Greenberger-Horne-Zeilinger (GHZ) states exhibit unique tripartite correlations without pairwise correlations.
- Theoretical studies on three-photon GHZ interferometers exist but lack experimental realization.
Purpose of the Study:
- To experimentally demonstrate three-photon interference distinct from two-photon or single-photon interference.
- To realize a three-photon Greenberger-Horne-Zeilinger (GHZ) interferometer.
- To explore multiphoton interferometry and its applications.
Main Methods:
- Utilized energy-time entangled photon triplets.
- Implemented a generalized Franson interferometer.
- Measured phase-dependent variations in three-photon coincidences.
Main Results:
- Successfully demonstrated three-photon interference.
- Observed phase-dependent coincidence variations with (92.7±4.6)% visibility.
- Confirmed interference not originating from lower-order photon interference.
Conclusions:
- The experiment provides the first realization of a three-photon GHZ interferometer.
- Demonstrated high-visibility multiparticle quantum interference.
- Opens new possibilities for multiphoton interferometry, fundamental quantum tests, and higher-dimensional quantum information applications.
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