Quantum Two-Level Systems in Josephson Junctions as Naturally Formed Qubits
Quantum Two-Level Systems in Josephson Junctions as Naturally Formed Qubits
The two-level systems (TLSs) naturally occurring in Josephson junctions constitute a major obstacle for the operation of superconducting phase qubits. Since these TLSs can possess remarkably long decoherence times, we show that such TLSs can themselves be used as qubits, allowing for a well controlled initialization, universal sets of quantum …