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arXiv:quant-ph/0207030 · Solvay Conference on Physics

QUANTUM ZENO SUBSPACES AND DYNAMICAL SUPERSELECTION RULES

PAOLO FACCHI, Saverio Pascazio

Published Aug 1, 2003• 3 citations
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Abstract

The quantum Zeno evolution of a quantum system takes place in a proper subspace of the total Hilbert space. The physical and mathematical features of the "Zeno subspaces" depend on the measuring apparatus: when this is included in the quantum description, the Zeno effect becomes a mere consequence of the dynamics and, remarkably, can be cast in terms of an adiabatic theorem, with a dynamical superselection rule. We look at several examples and focus on quantum computation and decoherence-free subspaces.

DOI
10.1142/9789812704634_0015

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