Perfect Zeno effect through imperfect measurements at a finite frequency

ORAL

Abstract

The quantum Zeno effect (QZE) is usually thought to require infinitely frequent and perfect (i.e., projective) measurements to freeze the dynamics of quantum states. We show that perfect freezing of quantum states can also be achieved by more realistic non-projective measurements performed at a finite frequency. Furthermore, we show that, in the case of qubits, in contrast to the usual QZE, the state freezing via imperfect measurements can be adjusted to preserve arbitrary states in the Bloch sphere.

*arXiv:1410.3826

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Authors

  • David Layden

    • University of Waterloo (Department of Applied Mathematics), Institute for Quantum Computing

  • Eduardo Martin-Martinez

    • Univ of Waterloo
    • University of Waterloo (Department of Applied Mathematics), Institute for Quantum Computing, Perimeter Institute for Theoretical Physics
    • Institute for Quantum Computing / Perimeter Institute for Theoretical Physics

  • Achim Kempf

    • University of Waterloo (Department of Applied Mathematics), Institute for Quantum Computing, Perimeter Institute for Theoretical Physics