Discrete-time quantum walks with the Dirac equation as continuum limit localize on topological defects in O(√N) steps with probability O(1/log N), numerically matching Grover search scaling.
The dirac equation as a quantum walk : higher dimensions, observational convergence
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The Grover search as a naturally occurring phenomenon
Discrete-time quantum walks with the Dirac equation as continuum limit localize on topological defects in O(√N) steps with probability O(1/log N), numerically matching Grover search scaling.