Demonstration of universal control between non-interacting qubits using the Quantum Zeno effect

E. Blumenthal*, C. Mor, A. A. Diringer, L. S. Martin, P. Lewalle, D. Burgarth, K. B. Whaley, S. Hacohen-Gourgy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
26 Downloads (Pure)


The Zeno effect occurs in quantum systems when a very strong measurement is applied, which can alter the dynamics in non-trivial ways. Despite being dissipative, the dynamics stay coherent within any degenerate subspaces of the measurement. Here we show that such a measurement can turn a single-qubit operation into a two- or multi-qubit entangling gate, even in a non-interacting system. We demonstrate this gate between two effectively non-interacting transmon qubits. Our Zeno gate works by imparting a geometric phase on the system, conditioned on it lying within a particular non-local subspace. These results show how universality can be generated not only by coherent interactions as is typically employed in quantum information platforms, but also by Zeno measurements.

Original languageEnglish
Article number88
Pages (from-to)1-6
Number of pages6
Journalnpj quantum information
Issue number1
Publication statusPublished - Dec 2022

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Copyright © 2022, The Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


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