During the last ten years, superconducting circuits have passed from being interesting
physical devices to becoming contenders for near-future useful and scalable quantum …

Since its introduction 25 years ago, the quantum weak value has gradually transitioned from
a theoretical curiosity to a practical laboratory tool. While its utility is apparent in the recent …

The realization of quantum error correction is an essential ingredient for reaching the full
potential of fault-tolerant universal quantum computation. Using a range of different …

In contrast to the spatial Bell's inequalities which probe entanglement between spatially
separated systems, the Leggett–Garg inequalities test the correlations of a single system …

The length of time that a quantum system can exist in a superposition state is determined by
how strongly it interacts with its environment. This interaction entangles the quantum state …

We present a scalable scheme for executing the error-correction cycle of a monolithic
surface-code fabric composed of fast-flux-tunable transmon qubits with nearest-neighbor …

With favourable error thresholds and requiring only nearest-neighbour interactions on a
lattice, the surface code is an error-correcting code that has garnered considerable attention …

Two topics, evolving rapidly in separate fields, were combined recently: the out-of-time-
ordered correlator (OTOC) signals quantum-information scrambling in many-body systems …

A central feature of quantum mechanics is that a measurement result is intrinsically
probabilistic. Consequently, continuously monitoring a quantum system will randomly …

We set out a general protocol for steering the state of a quantum system from an arbitrary
initial state toward a chosen target state by coupling it to auxiliary quantum degrees of …