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Abstract: We argue that in a second order quantum phase transition driven by aninhomogeneous quench density of quasiparticle excitations is suppressed whenvelocity at which a critical point propagates across a system falls below athreshold velocity equal to the Kibble-Zurek correlation length times theenergy gap at freeze-out divided by $\hbar$. This general prediction issupported by an analytic solution in the quantum Ising chain. Our resultssuggest, in particular, that adiabatic quantum computers can be made moreadiabatic when operated in an -inhomogeneous- way.



Author: Jacek Dziarmaga, Marek M. Rams

Source: https://arxiv.org/



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