The randomized measurement toolbox

A Elben, ST Flammia, HY Huang, R Kueng… - Nature Reviews …, 2023 - nature.com
Programmable quantum simulators and quantum computers are opening unprecedented
opportunities for exploring and exploiting the properties of highly entangled complex …

Entanglement barrier and its symmetry resolution: Theory and experimental observation

A Rath, V Vitale, S Murciano, M Votto, J Dubail… - PRX Quantum, 2023 - APS
The operator entanglement (OE) is a key quantifier of the complexity of a reduced density
matrix. In out-of-equilibrium situations, eg, after a quantum quench of a product state, it is …

[HTML][HTML] Analysing quantum systems with randomised measurements

P Cieśliński, S Imai, J Dziewior, O Gühne, L Knips… - Physics Reports, 2024 - Elsevier
Measurements with randomly chosen settings determine many important properties of
quantum states without the need for a shared reference frame or calibration. They naturally …

Native qudit entanglement in a trapped ion quantum processor

P Hrmo, B Wilhelm, L Gerster, MW van Mourik… - Nature …, 2023 - nature.com
Quantum information carriers, just like most physical systems, naturally occupy high-
dimensional Hilbert spaces. Instead of restricting them to a two-level subspace, these high …

Optimizing shadow tomography with generalized measurements

HC Nguyen, JL Bönsel, J Steinberg, O Gühne - Physical Review Letters, 2022 - APS
Advances in quantum technology require scalable techniques to efficiently extract
information from a quantum system. Traditional tomography is limited to a handful of qubits …

Universal qudit gate synthesis for transmons

LE Fischer, A Chiesa, F Tacchino, DJ Egger, S Carretta… - PRX Quantum, 2023 - APS
Gate-based quantum computers typically encode and process information in two-
dimensional units called qubits. Using d-dimensional qudits instead may offer intrinsic …

Resource-efficient high-dimensional entanglement detection via symmetric projections

S Morelli, M Huber, A Tavakoli - Physical Review Letters, 2023 - APS
We introduce two families of criteria for detecting and quantifying the entanglement of a
bipartite quantum state of arbitrary local dimension. The first is based on measurements in …

Variational quantum simulation of U (1) lattice gauge theories with qudit systems

PP Popov, M Meth, M Lewestein, P Hauke… - Physical Review …, 2024 - APS
Lattice gauge theories are fundamental to various fields, including particle physics,
condensed matter, and quantum information theory. Recent progress in the control of …

High-fidelity, multiqubit generalized measurements with dynamic circuits

P Ivashkov, G Uchehara, L Jiang, DS Wang, A Seif - PRX Quantum, 2024 - APS
Generalized measurements, also called positive operator-valued measures (POVMs), can
offer advantages over projective measurements in various quantum information tasks. Here …

Dual-frame optimization for informationally complete quantum measurements

LE Fischer, T Dao, I Tavernelli, F Tacchino - Physical Review A, 2024 - APS
Randomized measurement protocols such as classical shadows represent powerful
resources for quantum technologies, with applications ranging from quantum state …