Quantum-mechanical effects at the macroscopic level were first explored in Josephson-
junction-based superconducting circuits in the 1980s. In recent decades, the emergence of …

We present an overview of recent advances in the study of energy dynamics and
mechanisms for energy conversion in qubit systems with special focus on realizations in …

Radiation sensors based on the heating effect of absorbed radiation are typically simple to
operate and flexible in terms of input frequency, so they are widely used in gas detection 1 …

We have realized a new interaction between superconducting qubits and a readout cavity
that results in the displacement of a coherent state in the cavity, conditioned on the state of …

While the squeezing of a propagating field can, in principle, be made arbitrarily strong, the
cavity-field squeezing is subject to the well-known 3 dB limit, and thus has limited …

Cavity quantum electrodynamics (QED) uses a cavity to engineer the mode structure of the
vacuum electromagnetic field such as to enhance the interaction between light and matter …

Qubit readout is an indispensable element of any quantum information processor. In this
work, we experimentally demonstrate a nonperturbative cross-Kerr couplingbetween a …

The Gottesman-Kitaev-Preskill (GKP) code encodes a logical qubit into a bosonic system
with resilience against single-photon loss, the predominant error in most bosonic systems …

We perform readout of a quantum-dot hybrid qubit coupled to a superconducting resonator
through a parametric, longitudinal interaction mechanism. Our experiments are performed …

Detectors of propagating microwave photons have recently been realized using
superconducting circuits. However, a number-resolved photocounter is still missing. In this …