Insufficiency of avoided crossings for witnessing large-scale quantum coherence in flux qubits
Insufficiency of avoided crossings for witnessing large-scale quantum coherence in flux qubits
Do experiments based on superconducting loops segmented with Josephson junctions (e.g., flux qubits) show macroscopic quantum behavior in the sense of Schr\"odinger's cat example? Various arguments based on microscopic and phenomenological models were recently adduced in this debate. We approach this problem by adapting (to flux qubits) the framework of …