4.6 Article

Bayesian experimental design and parameter estimation for ultrafast spin dynamics

Related references

Note: Only part of the references are listed.
Article Optics

Single and multi-pulse based X-ray photon correlation spectroscopy

Wonhyuk Jo et al.

Summary: The pulsed nature of synchrotron radiation allows for the study of microsecond dynamics in complex materials through speckle-based techniques. In this study, we measure the dynamics of a colloidal system by combining single and multiple X-ray pulses from a storage ring. We use speckle correlation techniques at various pulse patterns to collect correlation functions ranging from nanoseconds to milliseconds. The obtained dynamics are in good agreement with the expected dynamics of Brownian motions, demonstrating the potential of using individual X-ray pulse patterns for future pulsed X-ray investigations.

OPTICS EXPRESS (2023)

Article Optics

Deep reinforcement learning for quantum multiparameter estimation

Valeria Cimini et al.

Summary: This study proposes a model-free and deep-learning-based approach to efficiently implement Bayesian quantum metrology tasks without relying on precise knowledge of the system model. A neural network is trained directly on experimental data to learn the multiparameter Bayesian update, and a reinforcement learning algorithm provides feedback to set the system at its optimal working point. Experimental results demonstrate higher estimation performances compared to standard methods, showcasing the strength of combining these two black-box algorithms on an integrated photonic circuit.

ADVANCED PHOTONICS (2023)

Article Multidisciplinary Sciences

Capturing dynamical correlations using implicit neural representations

Sathya R. Chitturi et al.

Summary: This research utilizes a machine learning platform combined with linear spin wave theory simulations to extract and optimize advanced models for ordered magnetic systems using inelastic neutron scattering data. It provides a framework for real-time analysis of experimental data in condensed matter.

NATURE COMMUNICATIONS (2023)

Article Materials Science, Multidisciplinary

Computational approaches to model X-ray photon correlation spectroscopy from molecular dynamics

Shaswat Mohanty et al.

Summary: X-ray photon correlation spectroscopy (XPCS) and X-ray speckle visibility spectroscopy (XSVS) are two methods used to study dynamic processes in materials. Interpretation of the data is important to establish the connection between macroscopic responses and microstructural dynamics, and a computational framework is presented to model these experiments. The efficiency and accuracy of two computational methods are compared, and the computed X-ray speckle patterns capture density fluctuations and show agreement with experimental results.

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING (2022)

Article Physics, Applied

Robust Spin Relaxometry with Fast Adaptive Bayesian Estimation

Michael Caouette-Mansour et al.

Summary: Spin relaxometry with nitrogen-vacancy (N-V) centers in diamond is a versatile probe for condensed-matter and biological systems, offering a spectrally selective, atomically localized, and calibrated measurement of microwave-frequency magnetic noise. Adaptive Bayesian estimation and a four signal measurement protocol are proposed to optimize the sensitivity and speed up the acquisition process. The combined technique provides a practical and hardware-agnostic approach for a wide range of N-V relaxometry applications.

PHYSICAL REVIEW APPLIED (2022)

Article Physics, Applied

Femtosecond diffraction and dynamic high pressure science

Justin S. Wark et al.

Summary: High-pressure solid-state materials are prevalent in the Universe, and X-ray diffraction has been used for nearly a century to understand the structure of matter under extreme conditions. With advances in X-ray technologies, novel FELs can now produce high quality single-shot diffraction data in a short period of time.

JOURNAL OF APPLIED PHYSICS (2022)

Article Physics, Applied

Simplified Algorithms for Adaptive Experiment Design in Parameter Estimation

Robert D. McMichael et al.

Summary: This paper introduces computational methods and simplified algorithms that accelerate utility calculations, eliminating the barrier of utility calculation for practical application of efficient adaptive measurement.

PHYSICAL REVIEW APPLIED (2022)

Proceedings Paper Computer Science, Theory & Methods

Testing the data framework for an AI algorithm in preparation for high data rate X-ray facilities

Hongwei Chen et al.

Summary: The study demonstrates a framework for real-time X-ray data analysis at high repetition rates, utilizing a machine-learning algorithm for automatic extraction of contrast parameters.

2022 4TH ANNUAL WORKSHOP ON EXTREME-SCALE EXPERIMENT-IN-THE-LOOP COMPUTING, XLOOP (2022)

Article Chemistry, Analytical

Particle Filters: A Hands-On Tutorial

Jos Elfring et al.

Summary: The particle filter algorithm has become popular since the early 1990s and is widely used for solving estimation problems. Extensive research has improved the standard algorithm, making it more applicable, but selecting and implementing an advanced version of the particle filter can be challenging for those with limited hands-on experience. Lack of implementation details in theory-oriented papers further complicates this task.

SENSORS (2021)

Article Physics, Applied

Sequential Bayesian experiment design for adaptive Ramsey sequence measurements

Robert D. McMichael et al.

Summary: The paper introduces a sequential Bayesian experiment design protocol for optimizing efficiency in Ramsey measurements, comparing it to other protocols. The Bayesian design is shown to be 2-5 times faster when estimating a single parameter, and converges four times faster when estimating four parameters, compared to other methods.

JOURNAL OF APPLIED PHYSICS (2021)

Article Instruments & Instrumentation

Optbayesexpt: Sequential Bayesian Experiment Design for Adaptive Measurements

Robert D. McMichael et al.

JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY (2021)

Article Multidisciplinary Sciences

Absolute contrast estimation for soft X-ray photon fluctuation spectroscopy using a variational droplet model

N. G. Burdet et al.

Summary: X-ray photon fluctuation spectroscopy using a two-pulse mode at the Linac Coherent Light Source shows potential for studying quantum fluctuations in materials but faces challenges in data analysis complexity. Modifying numerical modeling tools can optimize parameters for extracting speckle contrast, allowing for measurement of correlation time for spontaneous fluctuations.

SCIENTIFIC REPORTS (2021)

Article Quantum Science & Technology

A machine learning approach to Bayesian parameter estimation

Samuel Nolan et al.

Summary: This theoretical study introduces a new method for Bayesian estimation using artificial neural networks, which shows superior performance with limited calibration data and is suitable for black-box sensors without explicit fitting models.

NPJ QUANTUM INFORMATION (2021)

Article Chemistry, Physical

X-ray Free Electron Laser-Induced Synthesis of ε-Iron Nitride at High Pressures

Huijeong Hwang et al.

Summary: The ultrafast synthesis of epsilon-Fe3N1+x from Fe and N-2 under high pressure using XFEL was observed, demonstrating the exploration of time-dependence of reactions under high-pressure conditions by coupling intense X-ray exposures with the source time structure.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2021)

Review Crystallography

Protein Dynamics and Time Resolved Protein Crystallography at Synchrotron Radiation Sources: Past, Present and Future

Jose M. Martin-Garcia

Summary: The ultrabright and ultrashort pulses from XFELs have enabled studies of crystallized molecular machines under 'native' conditions at room temperature. Upgraded synchrotrons with sophisticated focusing optics and fast detectors offer new possibilities for time-resolved crystallography experiments. Increasing publications report new findings in structural dynamics of protein macromolecules using this approach.

CRYSTALS (2021)

Review Chemistry, Multidisciplinary

From Femtoseconds to Hours-Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

Felix Lehmkuehler et al.

Summary: X-ray photon correlation spectroscopy (XPCS) is a technique that enables the study of sample dynamics between micrometer and atomic length scales, benefiting from the increased brilliance of next-generation synchrotron radiation and Free-Electron Laser (FEL) sources. The time scales accessible by XPCS scale with the square of the coherent flux, allowing for studies over more than 18 orders of magnitude in time.

APPLIED SCIENCES-BASEL (2021)

Article Multidisciplinary Sciences

Topological magnon insulators in two-dimensional van der Waals ferromagnets CrSiTe3 and CrGeTe3: Toward intrinsic gap-tunability

Fengfeng Zhu et al.

Summary: The study reports the realization of topological magnon insulators in CrXTe3 compounds, confirming the nontrivial nature of gap opening at the magnon band-crossing Dirac points and the emergence of corresponding in-gap topological edge states. This class of remarkable 2D materials is expected to lead to new technological applications in magnonics and topological spintronics.

SCIENCE ADVANCES (2021)

Review Optics

Recent progress of laboratory astrophysics with intense lasers

Hideaki Takabe et al.

Summary: Since the birth of lasers in 1960 by T.H. Maiman, rapid progress in high-power lasers has mainly been used to study the scientific feasibility of laser fusion. Intense lasers for inertial confinement fusion have attracted attention as a new future energy source, leading to research on hydrodynamic instability and turbulent mixing of compressible fluids. Collaboration between laser plasma researchers and astrophysicists has led to the proposal and promotion of laboratory astrophysics with intense lasers, which has diversified to study various nonlinear physics of collisionless plasmas in the last decade. A review of recent papers and a focus on modeling cosmic-ray acceleration with lasers hint at the future main topic in laboratory astrophysics research.

HIGH POWER LASER SCIENCE AND ENGINEERING (2021)

Article Physics, Multidisciplinary

Spontaneous fluctuations in a magnetic Fe/Gd skyrmion lattice

M. H. Seaberg et al.

Summary: Magnetic skyrmions, as topological spin textures, exhibit inherent fluctuations suggesting similarities with high-temperature superconductors, rather than freezing into a static crystal. The study of fluctuation properties of Fe/Gd skyrmion lattice using short-pulsed x rays reveals underdamped oscillations and critical-like slowing down of fluctuations before the continuous phase transition.

PHYSICAL REVIEW RESEARCH (2021)

Article Quantum Science & Technology

Neural-Network Heuristics for Adaptive Bayesian Quantum Estimation

Lukas J. Fiderer et al.

Summary: Quantum metrology faces challenges in practice due to limited resources, but the adaptive Bayesian approach allows efficient resource utilization through adaptive experiment design. Fast numerical solutions for Bayesian updates and adaptive experiment design are crucial for practical success. Neural networks can be trained to develop fast and strong experiment-design heuristics, outperforming established heuristics for important quantum estimation tasks. This method complements existing techniques and forms a comprehensive framework for adaptive quantum estimation.

PRX QUANTUM (2021)

Article Materials Science, Multidisciplinary

X-ray free electron laser heating of water and gold at high static pressure

Rachel J. Husband et al.

Summary: This study demonstrates a fast experimental strategy for creating and probing extreme states of H2O using static compression and ultrafast X-ray laser heating. Indirect X-ray laser heating of water via a gold absorber showed no evidence of reactivity, providing essential insights into understanding planetary interiors.

COMMUNICATIONS MATERIALS (2021)

Article Materials Science, Multidisciplinary

Interplay of Dzyaloshinskii-Moriya and Kitaev interactions for magnonic properties of Heisenberg-Kitaev honeycomb ferromagnets

Li-Chuan Zhang et al.

Summary: This paper demonstrates the distinction of magnitudes of Dzyaloshinskii-Moriya and Kitaev interactions in two-dimensional materials, with a focus on magnonic transport properties. It reveals nontrivial magnonic topological properties in honeycomb ferromagnets and the significant impact of a magnetic field on magnonic topological transport properties.

PHYSICAL REVIEW B (2021)

Review Materials Science, Multidisciplinary

A snapshot review-Fluctuations in quantum materials: from skyrmions to superconductivity

L. Shen et al.

Summary: Studying fluctuations offers a fresh perspective to understand material properties, and can be related to dynamic susceptibility through the fluctuation-dissipation theorem. The new X-ray tool provides an opportunity to uncover new physics in quantum materials, with future measurements planned for exploring unconventional superconductivity.

MRS ADVANCES (2021)

Article Physics, Multidisciplinary

Fundamental Spin Interactions Underlying the Magnetic Anisotropy in the Kitaev Ferromagnet CrI3

Inhee Lee et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Applied

Skyrmion fluctuations at a first-order phase transition boundary

V Esposito et al.

APPLIED PHYSICS LETTERS (2020)

Article Physics, Multidisciplinary

Probing light-driven quantum materials with ultrafast resonant inelastic X-ray scattering

Matteo Mitrano et al.

COMMUNICATIONS PHYSICS (2020)

Article Materials Science, Multidisciplinary

Theory for time-resolved resonant inelastic x-ray scattering

Yuan Chen et al.

PHYSICAL REVIEW B (2019)

Article Physics, Multidisciplinary

Topological Spin Excitations in Honeycomb Ferromagnet CrI3

Lebing Chen et al.

PHYSICAL REVIEW X (2018)

Article Physics, Multidisciplinary

Nanosecond X-Ray Photon Correlation Spectroscopy on Magnetic Skyrmions

M. H. Seaberg et al.

PHYSICAL REVIEW LETTERS (2017)

Article Multidisciplinary Sciences

Reconstruction from limited single-particle diffraction data via simultaneous determination of state, orientation, intensity, and phase

Jeffrey J. Donatelli et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2017)

Review Statistics & Probability

A Review of Modern Computational Algorithms for Bayesian Optimal Design

Elizabeth G. Ryan et al.

INTERNATIONAL STATISTICAL REVIEW (2016)

Article Physics, Condensed Matter

A first theoretical realization of honeycomb topological magnon insulator

S. A. Owerre

JOURNAL OF PHYSICS-CONDENSED MATTER (2016)

Article Physics, Multidisciplinary

X-ray free-electron lasers: from dreams to reality

C. Pellegrini

PHYSICA SCRIPTA (2016)

Article Physics, Multidisciplinary

Realization of the Haldane-Kane-Mele Model in a System of Localized Spins

Se Kwon Kim et al.

PHYSICAL REVIEW LETTERS (2016)

Article Spectroscopy

Time-resolved X-ray photoelectron spectroscopy techniques for the study of interfacial charge dynamics

Stefan Neppl et al.

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA (2015)

Article Physics, Condensed Matter

Linear spin wave theory for single-Q incommensurate magnetic structures

S. Toth et al.

JOURNAL OF PHYSICS-CONDENSED MATTER (2015)

Article Engineering, Multidisciplinary

Fast estimation of expected information gains for Bayesian experimental designs based on Laplace approximations

Quan Long et al.

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING (2013)

Article Computer Science, Interdisciplinary Applications

Simulation-based optimal Bayesian experimental design for nonlinear systems

Xun Huan et al.

JOURNAL OF COMPUTATIONAL PHYSICS (2013)

Review Physics, Applied

Status and prospects of x-ray free-electron lasers (X-FELs): a simple presentation

Primoz Rebernik Ribic et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2012)

Article Physics, Multidisciplinary

Robust online Hamiltonian learning

Christopher E. Granade et al.

NEW JOURNAL OF PHYSICS (2012)

Article Physics, Multidisciplinary

High Contrast X-ray Speckle from Atomic-Scale Order in Liquids and Glasses

S. O. Hruszkewycz et al.

PHYSICAL REVIEW LETTERS (2012)

Article Physics, Multidisciplinary

Quantum criticality

Subir Sachdev et al.

PHYSICS TODAY (2011)

Article Physics, Multidisciplinary

Resonant inelastic x-ray scattering studies of elementary excitations

Luuk J. P. Ament et al.

REVIEWS OF MODERN PHYSICS (2011)

Article Spectroscopy

X-ray photoelectron spectroscopy: Progress and perspectives

C. S. Fadley

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA (2010)

Review Astronomy & Astrophysics

A review of X-ray intensity fluctuation spectroscopy

Mark Sutton

COMPTES RENDUS PHYSIQUE (2008)

Article Chemistry, Multidisciplinary

Single particle X-ray diffractive imaging

Michael J. Bogan et al.

NANO LETTERS (2008)

Article Instruments & Instrumentation

Speckle-visibility spectroscopy: A tool to study time-varying dynamics

R Bandyopadhyay et al.

REVIEW OF SCIENTIFIC INSTRUMENTS (2005)

Review Biochemistry & Molecular Biology

Synchrotron crystallography

WA Hendrickson

TRENDS IN BIOCHEMICAL SCIENCES (2000)

Article Instruments & Instrumentation

Using direct illumination CCDs as high-resolution area detectors for X-ray scattering

F Livet et al.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2000)

Review Physics, Multidisciplinary

Phonon spectroscopy by inelastic x-ray scattering

E Burkel

REPORTS ON PROGRESS IN PHYSICS (2000)