In this review recent investigations are summarized of many-body quantum systems with
long-range interactions, which are currently realized in Rydberg atom arrays, dipolar …

Interactions govern the flow of information and the formation of correlations between
constituents of many-body quantum systems, dictating phases of matter found in nature and …

Building scalable quantum systems that demonstrate performance enhancement based on
entanglement is a major goal in quantum computing and metrology. The main challenge …

Simple models of interacting spins have an important role in physics. They capture the
properties of many magnetic materials, but also extend to other systems, such as bosons …

Spin squeezing is a form of entanglement that reshapes the quantum projection noise to
improve measurement precision. Here, we provide numerical and analytic evidence for the …

The quantum alternating operator ansatz (QAOA) is a prominent example of variational
quantum algorithms. We propose a generalized QAOA called CD-QAOA, which is inspired …

The physical realization of Z 2 topological order as encountered in the paradigmatic toric
code has proven to be an elusive goal. We predict that this phase of matter can be realized …

Abstract In conventional Bardeen–Cooper–Schrieffer superconductors, electrons with
opposite momenta bind into Cooper pairs due to an attractive interaction mediated by …

We investigate the collective decay dynamics of atoms with a generic multilevel structure
(angular momenta F↔ F′) coupled to two light modes of different polarization inside a …

The interaction between an atomic ensemble and a light mode in a high-finesse optical
cavity can easily reach the strong-coupling regime, where quantum effects dominate. In this …