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 …

The efficiency of the future devices for quantum information processing is limited mostly by
the finite decoherence rates of the individual qubits and quantum gates. Recently …

Superconducting circuits can behave like atoms making transitions between two levels.
Such circuits can test quantum mechanics at macroscopic scales and be used to conduct …

Experiments have lagged theory in exploring chemical interactions at temperatures so low
that translational degrees of freedom can no longer be treated classically. The difficulty has …

We theoretically investigate the influence of designed pulse sequences in restoring quantum
coherence lost due to background noise in superconducting qubits. We consider both 1/f …

A qubit subjected to pure dephasing due to classical Gaussian noise can be turned into a
spectrometer of this noise by utilizing its readout under properly chosen dynamical …

In structurally disordered solids, some atoms or small groups of atoms are able to quantum
mechanically tunnel between two nearly equivalent sites. These atomic tunneling systems …

The efficiency of the future devices for quantum information processing will be limited mostly
by the finite decoherence rates of the qubits. Recently, substantial progress was achieved in …

Recent progress with microfabricated quantum devices has revealed that an ubiquitous
source of noise originates in tunneling material defects that give rise to a sparse bath of …

Superconducting integrated circuits incorporating Josephson junctions are an attractive
candidate for scalable quantum information processing in the solid state. The strong …