Entanglement and collective quantum operations

A. Chefles, C.R. Gilson, S.M. Barnett

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We show how shared entanglement, together with classical communication and local quantum operations, can be used to perform an arbitrary collective quantum operation upon N spatially-separated qubits. A simple teleportation-based protocol for achieving this, which requires 2(N-1) ebits of shared, bipartite entanglement and 4(N-1) classical bits, is proposed. In terms of the total required entanglement, this protocol is shown to be optimal for even N in both the asymptotic limit and for 'one-shot' applications.
Original languageEnglish
Pages (from-to)10-14
Number of pages4
JournalPhysics Letters A
Issue number1
Publication statusPublished - 14 Aug 2000


  • quantum operations
  • entanglement
  • quantum physics


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