Deterministic local doubling of W states


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Yeşilyurt C., Buğu S., Özaydın F., Altıntaş A. A., Tame M., Yang L., ...More

OPTICA, vol.33, pp.2313-2319, 2016 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 33
  • Publication Date: 2016
  • Journal Name: OPTICA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2313-2319
  • Istanbul University Affiliated: No

Abstract

In large quantum systems, multipartite entanglement can be found in many inequivalent classes. Preparing states of arbitrary size in different classes is important for performing a wide range of quantum protocols. W" role="presentation" >W states, in particular, constitute a class with a variety of quantum networking protocols. However, all known schemes for preparing polarization encoded photonic W" role="presentation" >W states are probabilistic, with resource requirements increasing at least sub-exponentially. We propose a deterministic scheme for preparing W" role="presentation" >W states of size of any power of 2, which requires no prior entanglement and can be performed locally. We introduce an all-optical setup that can efficiently double the size of W" role="presentation" >W states of arbitrary size. Our scheme advances the use of W" role="presentation" >W states in real-world quantum networks and could be extended to other physical systems.