Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits

Abstract

Since the very first experiments, superconducting circuits have suffered from strong coupling to environmental noise, destroying quantum coherence and degrading performance. In state-of-the-art experiments, it is found that the relaxation time of superconducting qubits fluctuates as a function of time. We present measurements of such fluctuations in a 3D-Transmon circuit and develop a qualitative model based on interactions within a bath of background two-level systems (TLS) which emerge from defects in the device material. In our model, the time-dependent noise density acting on the qubit emerges from its near-resonant coupling to high-frequency TLS which experience energy fluctuations due to their interaction with thermally fluctuating TLS at low frequencies. We support the model by providing experimental evidence of such energy fluctuations observed in a single TLS in a phase qubit circuit.

14 pages, 7 figures, as published

References in corpus (12)

• Charge insensitive qubit design derived from the Cooper pair box
• Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
• State tomography of capacitively shunted phase qubits with high fidelity
• Low- and high-frequency noise from coherent two-level systems
• Observation of directly interacting coherent two-level systems in a solid
• Generalized Tunneling Model for TLS in amorphous materials and its predictions for their dephasing and the noise in superconducting microresonators
• Measuring the temperature dependence of individual two-level systems by direct coherent control
• A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor
• Dissipation in circuit quantum electrodynamics: lasing and cooling of a low-frequency oscillator
• Quantitative evaluation of defect-models in superconducting phase qubits
• Multi-photon spectroscopy of a hybrid quantum system
• Nonequilibrium Spin Noise and Noise of Susceptibility

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