Semidefinite programs are convex optimization problems involving a linear objective
function and a domain of positive-semidefinite matrices. Over the past two decades, they …

Entanglement is an important resource for quantum technologies. There are many ways
quantum systems can be entangled, ranging from the two-qubit case to entanglement in …

Scalable generation of genuine multipartite entanglement with an increasing number of
qubits is important for both fundamental interest and practical use in quantum-information …

We generate and characterize entangled states of a register of 20 individually controlled
qubits, where each qubit is encoded into the electronic state of a trapped atomic ion …

We propose an ordered set of experimentally accessible conditions for detecting
entanglement in mixed states. The k-th condition involves comparing moments of the …

Quantum networks are distributed quantum many-body systems with tailored topology and
controlled information exchange. They are the backbone of distributed quantum computing …

The Fisher information F gives a limit to the ultimate precision achievable in a phase
estimation protocol. It has been shown recently that the Fisher information for a linear two …

We present several entanglement criteria in terms of the quantum Fisher information that
help to relate various forms of multipartite entanglement to the sensitivity of phase …

We report the preparation and verification of a genuine 12-qubit entanglement in a
superconducting processor. The processor that we designed and fabricated has qubits lying …

One of the greatest challenges in the fields of quantum information processing and quantum
technologies is the detailed coherent control over each and every constituent of quantum …