Experimental quantum multimeter and one-qubit fingerprinting

Jiangfeng Du, Ping Zou, Xinhua Peng, Daniel K. L. Oi, L. C. Kwek, C. H. Oh, Artur Ekert

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


There has been much recent effort to realize quantum devices in many different physical systems. Among them, nuclear magnetic resonance (NMR) has been the first to demonstrate nontrivial quantum algorithms with small numbers of qubits and hence is a prototype for the key ingredients needed to build quantum computers. An important building block in many quantum applications is the scattering circuit, which can be used as a quantum multimeter to perform various quantum information processing tasks directly without recourse to quantum tomography. We implement in NMR a three-qubit version of the multimeter and also demonstrate a single-qubit fingerprinting.

Original languageEnglish
Article number042319
Pages (from-to)-
Number of pages4
JournalPhysical Review A
Issue number4
Publication statusPublished - Oct 2006


  • fredkin gate
  • information processor
  • computation
  • spectroscopy
  • logic
  • fingerprinting
  • quantum multimeter

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