Learning many-body Hamiltonians with Heisenberg-limited scaling

HY Huang, Y Tong, D Fang, Y Su - Physical Review Letters, 2023 - APS
Learning a many-body Hamiltonian from its dynamics is a fundamental problem in physics.
In this Letter, we propose the first algorithm to achieve the Heisenberg limit for learning an …

Inverse Mpemba effect demonstrated on a single trapped ion qubit

S Aharony Shapira, Y Shapira, J Markov, G Teza… - Physical Review Letters, 2024 - APS
The Mpemba effect is a counterintuitive phenomena in which a hot system reaches a cold
temperature faster than a colder system, under otherwise identical conditions. Here, we …

Practical Hamiltonian learning with unitary dynamics and Gibbs states

A Gu, L Cincio, PJ Coles - Nature Communications, 2024 - nature.com
We study the problem of learning the parameters for the Hamiltonian of a quantum many-
body system, given limited access to the system. In this work, we build upon recent …

Heisenberg-limited Hamiltonian learning for interacting bosons

H Li, Y Tong, T Gefen, H Ni, L Ying - npj Quantum Information, 2024 - nature.com
We develop a protocol for learning a class of interacting bosonic Hamiltonians from
dynamics with Heisenberg-limited scaling. For Hamiltonians with an underlying bounded …

Lindblad tomography of a superconducting quantum processor

GO Samach, A Greene, J Borregaard, M Christandl… - Physical Review …, 2022 - APS
As progress is made towards the first generation of error-corrected quantum computers,
robust characterization and validation protocols are required to assess the noise …

Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics

A Valenti, G Jin, J Léonard, SD Huber, E Greplova - Physical Review A, 2022 - APS
Large-scale quantum devices provide insights beyond the reach of classical simulations.
However, for a reliable and verifiable quantum simulation, the building blocks of the …

Optimal short-time measurements for Hamiltonian learning

A Zubida, E Yitzhaki, NH Lindner, E Bairey - arXiv preprint arXiv …, 2021 - arxiv.org
Characterizing noisy quantum devices requires methods for learning the underlying
quantum Hamiltonian which governs their dynamics. Often, such methods compare …

Optimized steering: Quantum state engineering and exceptional points

P Kumar, K Snizhko, Y Gefen, B Rosenow - Physical Review A, 2022 - APS
The state of a quantum system may be steered towards a predesignated target state,
employing a sequence of weak blind measurements (where the detector's readouts are …

Engineering two-qubit mixed states with weak measurements

P Kumar, K Snizhko, Y Gefen - Physical review research, 2020 - APS
It is known that protocols based on weak measurements can be used to steer quantum
systems into predesignated pure states. Here we show that weak-measurement-based …

[HTML][HTML] Recovery of a generic local Hamiltonian from a degenerate steady state

J Zhou, DL Zhou - Physics Letters A, 2024 - Elsevier
Hamiltonian Learning (HL) is essential for validating quantum systems in quantum
computing. Not all Hamiltonians can be uniquely recovered from a steady state. HL success …