Experimental Distribution of Entanglement with Separable Carriers

A. Fedrizzi*, M. Zuppardo, G.G. Gillett, M. A. Broome, M.P. Almeida, M. Paternostro, A.G. White, T. Paterek

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)
145 Downloads (Pure)

Abstract

The key requirement for quantum networking is the distribution of entanglement between nodes. Surprisingly, entanglement can be generated across a network without direct transfer - or communication - of entanglement. In contrast to information gain, which cannot exceed the communicated information, the entanglement gain is bounded by the communicated quantum discord, a more general measure of quantum correlation that includes but is not limited to entanglement. Here, we experimentally entangle two communicating parties sharing three initially separable photonic qubits by exchange of a carrier photon that is unentangled with either party at all times. We show that distributing entanglement with separable carriers is resilient to noise and in some cases becomes the only way of distributing entanglement through noisy environments.
Original languageEnglish
Article number230504
Number of pages5
JournalPhysical Review Letters
Volume111
Issue number23
Early online date04 Dec 2013
DOIs
Publication statusPublished - 06 Dec 2013

Keywords

  • DENSITY-MATRICES
  • QUANTUM
  • COMMUNICATION
  • STATES

Fingerprint

Dive into the research topics of 'Experimental Distribution of Entanglement with Separable Carriers'. Together they form a unique fingerprint.

Cite this