Introduction to Haar measure tools in quantum information: A beginner's tutorial

AA Mele - Quantum, 2024 - quantum-journal.org
The Haar measure plays a vital role in quantum information, but its study often requires a
deep understanding of representation theory, posing a challenge for beginners. This tutorial …

[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 …

A Lie algebraic theory of barren plateaus for deep parameterized quantum circuits

M Ragone, BN Bakalov, F Sauvage, AF Kemper… - Nature …, 2024 - nature.com
Variational quantum computing schemes train a loss function by sending an initial state
through a parametrized quantum circuit, and measuring the expectation value of some …

Theory for equivariant quantum neural networks

QT Nguyen, L Schatzki, P Braccia, M Ragone, PJ Coles… - PRX Quantum, 2024 - APS
Quantum neural network architectures that have little to no inductive biases are known to
face trainability and generalization issues. Inspired by a similar problem, recent …

Projected state ensemble of a generic model of many-body quantum chaos

A Chan, A De Luca - Journal of Physics A: Mathematical and …, 2024 - iopscience.iop.org
The projected ensemble is based on the study of the quantum state of a subsystem A
conditioned on projective measurements in its complement. Recent studies have observed …

A new approach to strong convergence

CF Chen, J Garza-Vargas, JA Tropp… - arxiv preprint arxiv …, 2024 - arxiv.org
A family of random matrices $\boldsymbol {X}^ N=(X_1^ N,\ldots, X_d^ N) $ converges
strongly to a family $\boldsymbol {x}=(x_1,\ldots, x_d) $ in a $ C^* $-algebra if $\| P …

Shadow tomography on general measurement frames

L Innocenti, S Lorenzo, I Palmisano, F Albarelli… - PRX Quantum, 2023 - APS
We provide a new perspective on shadow tomography by demonstrating its deep
connections with the general theory of measurement frames. By showing that the formalism …