Efficient population transfer via non-ergodic extended states in quantum spin glass

12 Jul 2018Kostyantyn KechedzhiVadim SmelyanskiyJarrod R. McCleanVasil S. DenchevMasoud MohseniSergei IsakovSergio BoixoBoris AltshulerHartmut Neven

We analyze a new computational role of coherent multi-qubit quantum tunneling that gives rise to bands of non-ergodic extended (NEE) quantum states each formed by a superposition of a large number of computational states (deep local minima of the energy landscape) with similar energies. NEE provide a mechanism for population transfer (PT) between computational states and therefore can serve as a new quantum subroutine for quantum search, quantum parallel tempering and reverse annealing optimization algorithms... (read more)

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