Amorphous solids show surprisingly universal behaviour at low temperatures. The
prevailing wisdom is that this can be explained by the existence of two-state defects within …

A major issue for the implementation of large-scale superconducting quantum circuits is the
interaction with interfacial two-level system (TLS) defects that lead to qubit parameter …

We demonstrate that a high kinetic inductance disordered-superconductor nanowire can
realize a circuit element–known as a superinductor–with a characteristic impedance greater …

The performance of a great variety of electronic devices—ranging from semiconductor
transistors to superconducting qubits—is hampered by low-frequency noise with spectra …

Noise and decoherence due to spurious two-level systems located at material interfaces are
long-standing issues for solid-state quantum devices. Efforts to mitigate the effects of two …

$1/f $ noise caused by microscopic Two-Level Systems (TLS) is known to be very
detrimental to the performance of superconducting quantum devices but the nature of these …

Quantum circuits interact with the environment via several temperature-dependent degrees
of freedom. Multiple experiments to-date have shown that most properties of …

Frequency instability of superconducting resonators and qubits leads to dephasing and time-
varying energy loss and hinders quantum processor tune-up. Its main source is dielectric …

The loss and noise mechanisms of superconducting resonators are useful tools for
understanding decoherence in superconducting circuits. While the loss mechanisms have …

The microwave properties of nano-scale structures are important in a wide variety of
applications in quantum technology. Here we describe a low-power cryogenic near-field …