Deterministic generation of multiparticle entanglement by quantum Zeno dynamics

G. Barontini, L. Hohmann, F. Haas, J. Esteve, J. Reichel

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Multiparticle entangled quantum states, a key resource in quantum-enhanced metrology and computing, are usually generated by coherent operations exclusively. However, unusual forms of quantum dynamics can be obtained when environment coupling is used as part of the state generation. In this work, we used quantum Zeno dynamics (QZD), based on nondestructive measurement with an optical microcavity, to deterministically generate different multiparticle entangled states in an ensemble of 36 qubit atoms in less than 5 microseconds. We characterized the resulting states by performing quantum tomography, yielding a time-resolved account of the entanglement generation. In addition, we studied the dependence of quantum states on measurement strength and quantified the depth of entanglement. Our results show that QZD is a versatile tool for fast and deterministic entanglement generation in quantum engineering applications.
Original languageEnglish
Pages (from-to)1317-1321
Number of pages5
JournalScience
Volume349
Issue number6254
DOIs
Publication statusPublished - 18 Sep 2015

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