A Josephson Junction Microscope for Low-frequency Fluctuators

Abstract

The high-Q harmonic oscillator mode of a Josephson junction can be used as a novel probe of spurious two-level systems (TLSs) inside the amorphous oxide tunnel barriers of the junction. In particular, we show that spectroscopic transmission measurements of the junction resonator mode can reveal how the coupling magnitude between the junction and the TLSs varies with an external magnetic field applied in the plane of the tunnel barrier. The proposed experiments offer the possibility of clearly resolving the underlying coupling mechanism for these spurious TLSs, an important decoherence source limiting the quality of superconducting quantum devices.

4 pages, 3 figures

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Cited by in corpus (19)

• Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems
• 1/f noise: implications for solid-state quantum information
• Damping and decoherence of a nanomechanical resonator due to a few two level systems
• Decoherence of a qubit due to a quantum fluctuator or to a classical telegraph noise
• Anomalous avoided level crossings in a Cooper-pair box spectrum
• Circuit QED and sudden phase switching in a superconducting qubit array
• Multi-level Spectroscopy of Two-Level Systems Coupled to a dc SQUID Phase Qubit
• Microscopic model of critical current noise in Josephson-junction qubits: Subgap resonances and Andreev bound states
• Spectroscopy of a Cooper-Pair Box Coupled to a Two-Level System Via Charge and Critical Current
• Stabilizing and improving qubit coherence by engineering noise spectrum of two-level systems
• Quantum dynamics in nonequilibrium environments
• Broadband noise decoherence in solid-state complex architectures
• Jaynes Cummings treatment of superconducting resonators with dielectric loss due to two-level systems
• Realistic quantum manipulation of two-level system fluctuators
• Effects of external driving on the coherence time of a Josephson junction qubit in a bath of two level fluctuators
• A superconducting circuit probe for analog quantum simulators
• Damping and decoherence of Fock states in a nanomechanical resonator due to two level systems
• Implementing Genuine Multi-Qubit Entanglement of Two-Level-System Inside a Superconducting Phase Qubit
• A Controllable Interaction between Two-Level Systems inside a Josephson Junction