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- W2086309809 abstract "The Quantum Zeno Effect (QZE) implies that a too frequent ($omega_phi to infty)$ observation of a quantum system would trap it in its initial state, even though it would be able to evolve to some other state if not observed. In our scheme, interacting spins in a 3-d cubic lattice, ``observe'' each other with a frequency $omega_phi $ $propto sqrt{J_x^2+J_y^2+J_z^2}/hbar $, where $J$'s are the coupling constants. This leads to a ``diffusive'' spread of a local excitation characterized by the constants $D_mu propto J_mu ^2/omega_phi .$ Thus, a strongly asymmetric interaction (e.g. $J_y/J_{x(z)}gg 1$), would hinder diffusion in the perpendicular directions ($D_{x(z)}to 0$) manifesting the QZE. We show that this effect is present in numerical solutions of simple 2-d systems. This reduction in the diffusion kinetics was experimentally observed in paramagnetic compounds where the asymmetry of the interaction network manifests through an exchange narrowed linewidth$.$ New experimental designs are proposed." @default.
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- W2086309809 date "1998-03-01" @default.
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- W2086309809 title "Dimensional crossover in spin diffusion: A manifestation of the quantum Zeno effect" @default.
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- W2086309809 doi "https://doi.org/10.1103/physrevb.57.5017" @default.
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