Three-photon energy–time entanglement
By L. Shalm, Deny Hamel, Zhizhong Yan, C. Simon, Kevin J. Resch, T. Jennewein. Nature Physics, 2012
176 citations recorded by the source corpus.
Many-particle entangled states and entanglement between continuous properties are valuable resources for quantum information, but are notoriously difficult to generate. An experiment now entangles the energy and emission times of three photons, creating generalized Einstein–Podolsky–Rosen correlations. Entangled quantum particles have correlations stronger than those allowed by classical physics. These correlations are at the heart of deep foundational questions in quantum mechanics1,2,3, and form the basis of many emerging quantum technologies4,5,6,7,8,9. Although the discrete variables of up to 14 ions10 and the continuous variables between three intense optical beams11,12 have been entangled, it has remained an open challenge to entangle the continuous properties of three or more individual particles. Here we experimentally demonstrate genuine tripartite continuous-variable entanglement between three separated particles. In our set-up the three particles are photons created directly from a single input photon; the creation process leads to quantum correlations between the energies and emission times of the photons. The entanglement between our photons is the three-party generalization of the Einstein–Podolsky–Rosen1 correlations for continuous variables, and could serve as a valuable resource in a wide variety of quantum information tasks.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/d23b706c3cc4877d8656eee608a34ab8e2a4ae47
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Entanglement certification from theory to experiment (2018, unknown): “[197] L.”
- Direct generation of three-photon polarization entanglement (2014, background): “This was recently verified experimentally [23], under the assumption that downconversion conserves energy.”
- Nonlinear optical signals and spectroscopy with quantum light (2016, background): “Entangled quantum states with higher photon numbers (Shalm et al., 2013) promise access to the χ(5)-susceptibility and its additional information content.”
- Multipartite Einstein–Podolsky–Rosen steering and genuine tripartite entanglement with optical networks (2014, background): “N systems are genuinely N -partite entangled if and only if the entanglement of the N -party system cannot be produced by mixing quantum states with fewer than N systems entangled [16, 17].”