Generation and confirmation of a (100 x 100)-dimensional entangled quantum system

Mario Krenn, Marcus Huber, Robert Fickler, Radek Lapkiewicz, Sven Ramelow, Anton Zeilinger

Research output: Contribution to journalArticleScientificpeer-review

202 Citations (Scopus)


Entangled quantum systems have properties that have fundamentally overthrown the classical worldview. Increasing the complexity of entangled states by expanding their dimensionality allows the implementation of novel fundamental tests of nature, and moreover also enables genuinely newprotocols for quantum information processing. Here we present the creation of a (100 x 100)-dimensional entangled quantum system, using spatial modes of photons. For its verification we develop a novel nonlinear criterion which infers entanglement dimensionality of a global state by using only information about its subspace correlations. This allows very practical experimental implementation as well as highly efficient extraction of entanglement dimensionality information. Applications in quantum cryptography and other protocols are very promising.

Original languageEnglish
Pages (from-to)6243-6247
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number17
Publication statusPublished - 29 Apr 2014
Externally publishedYes
Publication typeA1 Journal article-refereed


  • photonic spatial modes
  • quantum optics
  • Schmidt rank
  • entanglement witness


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