Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

The Quantum-Mechanical Model of an Atom

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.

Thermodynamic Systems

Thermodynamic Systems

A thermodynamic system is a set of objects whose thermodynamic properties are of interest. The system is considered to be embedded in its surroundings or the environment. The system and its environment can exchange heat and do work on each other through a boundary that separates them. However, the immediate surroundings of the system interact with it directly and therefore have a much stronger influence on its behavior and properties.
Consider an example of tea boiling in a kettle. The...

Phylogenetic Trees

Phylogenetic Trees

Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.

Virtual Work for a System of Connected Rigid Bodies

Virtual Work for a System of Connected Rigid Bodies

Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...

Net Torque Calculations

Net Torque Calculations

When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...

Sequence Networks of Rotating Machines

Sequence Networks of Rotating Machines

A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

On the discretization error of the discrete generalized quantum master equation.

The Journal of chemical physics·2025

Same author

Interpolating numerically exact many-body wave functions for accelerated molecular dynamics.

Nature communications·2025

Same author

Investigating the collective nature of cavity-modified chemical kinetics under vibrational strong coupling.

Nanophotonics (Berlin, Germany)·2024

Same author

Correlation functions from tensor network influence functionals: The case of the spin-boson model.

The Journal of chemical physics·2024

Same author

Fast and accurate nonadiabatic molecular dynamics enabled through variational interpolation of correlated electron wavefunctions.

Faraday discussions·2024

Same author

Maximally localized dynamical quantum embedding for solving many-body correlated systems.

Nature computational science·2024

Search research articles

Related Experiment Video

Updated: Jan 10, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

pyTTN: An open-source toolbox for open and closed system quantum dynamics simulations using tree tensor networks.

Lachlan P Lindoy¹, Daniel Rodrigo-Albert¹, Yannic Rath¹

¹National Physical Laboratory, Teddington TW11 0LW, United Kingdom.

The Journal of Chemical Physics

|November 24, 2025

Summary

This summary is machine-generated.

We introduce the Python Tree Tensor Network (pyTTN) package for simulating quantum systems. This tool efficiently models quantum dynamics using Tree Tensor Networks (TTN) for both closed and open systems.

More Related Videos

Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization

Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization

Published on: August 22, 2025

Related Experiment Videos

Last Updated: Jan 10, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization

Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization

Published on: August 22, 2025

Area of Science:

Computational Physics
Quantum Chemistry
Quantum Information Science

Background:

Accurate simulation of quantum systems is crucial for understanding molecular dynamics and material properties.
Existing methods often face scalability challenges with increasing system size and complexity.
Tree Tensor Network (TTN) based wave function representations offer a promising approach for efficient quantum simulations.

Purpose of the Study:

To present the Python Tree Tensor Network (pyTTN) package for evaluating dynamical properties of quantum systems.
To enable efficient simulations of both closed and open quantum systems using TTN ansätze.
To provide a user-friendly and extendable platform for advanced quantum dynamics research.

Main Methods:

Utilizes Tree Tensor Network (TTN) representations for wave functions.
Implements adaptive bond dimension techniques via subspace expansion for efficiency.
Supports zero- and finite-temperature calculations for general Hamiltonians.
Includes tools for open quantum system dynamics, such as hierarchical equations of motion and generalized quasi-Lindblad methods.

Main Results:

Demonstrates the package's capability through benchmark simulations of photo-excitation dynamics in pyrazine.
Applies pyTTN to a challenging model of exciton dynamics in a donor-acceptor system.
Successfully models various open quantum systems, including the spin-boson model and Anderson impurity model.

Conclusions:

The pyTTN package offers a powerful, efficient, and user-friendly tool for quantum dynamics simulations.
Its design facilitates integration into broader computational modeling workflows.
pyTTN is well-suited for diverse applications in condensed matter physics, quantum chemistry, and quantum information science.