How to localize excitations in a quantum computer with perpetually coupled qubits

摘要

Strong many-particle localization is studied in a 1D array of perpetually coupled qubits and an equivalent 1D system of interacting fermions. We construct a bounded sequence of the on-site fermion energies, or qubit transition frequencies, that suppresses resonant hopping between both nearest and remote neighbors. Besides quasi-exponential decay of the single-particle transition amplitude, it leads to long lived strongly localized many-particle states. This makes quantum computing with time-independent qubit coupling viable.