An entanglement filter.
basic_science · Level V
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- Record sourced from PubMed, PMID 19164743.
- Also identified by DOI 10.1126/science.1167182.
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Abstract
The ability to filter quantum states is a key capability in quantum information science and technology, in which one-qubit filters, or polarizers, have found wide application. Filtering on the basis of entanglement requires extension to multi-qubit filters with qubit-qubit interactions. We demonstrated an optical entanglement filter that passes a pair of photons if they have the desired correlations of their polarization. Such devices have many important applications to quantum technologies.