Quantum two level systems and Kondo-like traps as possible sources of decoherence in superconducting qubits

Abstract

We discuss the origin of decoherence in Josephson junction qubits. We find that two level systems in the surrounding insulator cannot be the dominant source of noise in small qubits. We argue that electron traps in the Josephson barrier with large Coulomb repulsion would give noise that agrees both in magnitude and in temperature dependence with experimental data.

4 pages, no figures

References in corpus (10)

• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Manipulating the Quantum State of an Electrical Circuit
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• Coherent dynamics of a flux qubit coupled to a harmonic oscillator
• Quantum oscillations in two coupled charge qubits
• Charge echo in a Cooper-pair box
• Quantum noise in the Josephson charge qubit
• Low- and high-frequency noise from coherent two-level systems
• Models of environment and T_1 relaxation in Josephson Charge Qubits

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