The coherence of state-of-the-art superconducting qubit devices is predominantly limited by
two-level-system defects, which are found primarily at amorphous interface layers. Reducing …

The interaction strength of an oscillator to a qubit grows with the oscillator's vacuum field
fluctuations. The well-known degenerate parametric oscillator has revived interest in the …

Significant progress has been made in building large-scale superconducting quantum
processors based on flip-chip technology. In this work, we use flip-chip technology to realize …

Qubits made from superconducting materials are a mature platform for quantum information
science application, such as quantum computing. However, material-based losses are now …

Growing SiO 2 layer by wet-chemical oxidation of Si surfaces before growth of another
insulating film (s) is a used method to passivate Si interfaces in applications (eg, solar cell …

Quantum circuits show unprecedented sensitivity to external fluctuations compared to their
classical counterparts, and it can take as little as a single atomic defect somewhere in a mm …

As the field of superconducting quantum computing approaches maturity, optimization of
single-device performance is proving to be a promising avenue toward large-scale quantum …

One of the main limitations in state-of-the art solid-state quantum processors is qubit
decoherence and relaxation due to noise from adsorbates on surfaces, impurities at …

A major roadblock to scalable quantum computing is phase decoherence and energy
relaxation caused by qubits interacting with defect-related two-level systems (TLSs). Native …

Two-level system (TLS) defects constitute a major decoherence source of quantum
information science, but they are generally less understood at material interfaces than in …