In the past 20 years, impressive progress has been made both experimentally and
theoretically in superconducting quantum circuits, which provide a platform for manipulating …

In this work we show that a tunable coupling between microwave resonators can be
engineered by means of simple Josephson junctions circuits, such as dc and rf …

We present a way to realize an n-qubit controlled phase gate with superconducting quantum-
interference devices (SQUIDs) by coupling them to a superconducting resonator. In this …

We propose how to generate macroscopic quantum superposition states using a microwave
cavity containing a superconducting charge qubit. Based on the measurement of charge …

Superconducting oscillators have been successfully used for quantum control and readout
devices in conjunction with superconducting qubits. Also, squeezed states can improve the …

We analyze three important experimental domains (SQUIDs, molecular interferometry, and
Bose–Einstein condensation) as well as quantum-biophysical studies of the neuronal …

An operational measure to quantify the sizes of some'macroscopic quantum superpositions',
realized in recent experiments, is proposed. The measure is based on the fact that a …

We show that by engineering the interaction with the environment, there exists a large class
of systems that can evolve irreversibly to a cat state. To be precise, we show that it is …

When a two-qubit system is initially maximally entangled, two independent decoherence
channels, one per qubit, would greatly reduce the entanglement of the two-qubit system …

We discuss a general method of model selection from experimentally recorded time-trace
data. This method can be used to distinguish between quantum and classical dynamical …