The non-dissipative nonlinearity of Josephson junctions converts macroscopic
superconducting circuits into artificial atoms, enabling some of the best-controlled qubits …

Josephson junctions are a central element in superconducting quantum technology; in these
devices, irreversibility arises from abrupt slips of the quantum phase difference across the …

The interaction between light and matter remains a central topic in modern physics despite
decades of intensive research. Coupling an isolated emitter to a single mode of the …

Electromagnetic fields possess zero point fluctuations which lead to observable effects such
as the Lamb shift and the Casimir effect. In the traditional quantum optics domain, these …

The demonstration of coherent quantum phase slips (CQPS) in disordered superconductors
has opened up a new route towards exploring the fundamental charge–phase duality in …

A chain of Josephson junctions represents one of the simplest many-body models
undergoing a superconductor–insulator quantum phase transition,. Apart from zero …

Quantum physics in one spatial dimension is remarkably rich, yet even with strong
interactions and disorder, surprisingly tractable. This is due to the fact that the low-energy …

We present a theoretical study of quantum phases and quantum phase transitions occurring
in non-Hermitian P T-symmetric superconducting qubits chains described by a transverse …

Instantons, spacetime-localized quantum field tunneling events, are ubiquitous in correlated
condensed matter and high-energy systems. However, their direct observation through …

Experiments with one-dimensional arrays of Josephson junctions in the regime of
dominating charging energy show that the Coulomb blockade is lifted at the threshold …