Many-particle localization by constructed disorder: enabling quantum computing with perpetually coupled qubits

摘要

We demonstrate that, in a many-particle system, particles can be stronglyconfined to their sites. The localization is obtained by constructing asequence of on-site energies that efficiently suppresses resonant hopping. Thetime during which a many-particle state remains strongly localized in aninfinite chain can exceed the reciprocal hopping frequency by $\agt 10^6$already for a narrow energy bandwidth. The results show viability of quantumcomputers with time-independent qubit coupling.