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

Fixed Action Patterns

Fixed Action Patterns

A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.

Fixing Double-strand Breaks

Fixing Double-strand Breaks

The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...

Fixing Double-strand Breaks

Fixing Double-strand Breaks

Growth versus Fixed Mindset

Growth versus Fixed Mindset

Carol Dweck introduced the term mindset to describe individuals' beliefs about their intellectual and personal capabilities. These beliefs significantly influence psychological processes such as motivation, goal-setting, and perseverance, ultimately shaping academic and life outcomes. Individuals generally possess one of two mindsets- a fixed or a growth mindset—each promoting different responses to success, failure, and challenge.Fixed vs. Growth MindsetA fixed mindset assumes that one's...

Quantum Numbers

Quantum Numbers

It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.

Dosage Regimen: Fixed Dose

Dosage Regimen: Fixed Dose

Fixed-dose regimens are a common approach to administer drugs to achieve and maintain desired levels of the drug in the body. In this dosing strategy, a specific amount of medication is given at regular intervals, often multiple times a day, to ensure a consistent drug concentration in the bloodstream.
Fixed-dose regimens can be used for various routes of administration, including intravenous (IV) injections and oral medications. For IV administration, a predetermined amount of the drug is...

You might also read

Related Articles

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

Sort by

Same author

Accurate Atomic Correlation and Total Energies for Correlation-Consistent Effective Core Potentials II: Rb-Xe Elements.

Journal of chemical theory and computation·2026

Same author

Assessing orbital optimization in variational and diffusion Monte Carlo.

The Journal of chemical physics·2026

Same author

Quantum Monte Carlo Pair Orbital Wave Functions for Periodic Systems.

Physical review letters·2025

Same author

A new generation of effective core potentials: Selected lanthanides and heavy elements II.

The Journal of chemical physics·2025

Same author

Reproducibility of fixed-node diffusion Monte Carlo across diverse community codes: The case of water-methane dimer.

The Journal of chemical physics·2025

Same author

Identifying Band Inversions in Topological Materials Using Diffusion Monte Carlo.

Journal of chemical theory and computation·2025

Same journal

Erratum: Low-dimensional model for adaptive networks of spiking neurons [Phys. Rev. E 111, 014422 (2025)].

Physical review. E·2026

Same journal

Disentangling the effects of many-body forces on depletion interactions.

Physical review. E·2026

Same journal

Charge transport and mode transition in dual-energy electron beam diodes.

Physical review. E·2026

Same journal

Optimization of multisite reactions in complex compartmentalized media.

Physical review. E·2026

Same journal

Origin of geometric cohesion in nonconvex granular materials: Interplay between interdigitation and rotational constraints enhancing frictional stability.

Physical review. E·2026

Same journal

Interaction of walkers with a standing Faraday wave.

Physical review. E·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Feb 15, 2026

Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock

Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock

Published on: June 6, 2011

Quantum Monte Carlo with variable spins: Fixed-phase and fixed-node approximations.

Cody A Melton¹, Lubos Mitas¹

¹Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA.

Physical Review. E

|January 20, 2018

Summary

This summary is machine-generated.

The fixed-phase spinor diffusion Monte Carlo method offers a more robust approach to electronic structure calculations than the fixed-node method. It simplifies complex calculations and reduces errors, improving accuracy for quantum systems.

More Related Videos

Graphene Enclosure of Chemically Fixed Mammalian Cells for Liquid-Phase Electron Microscopy

Graphene Enclosure of Chemically Fixed Mammalian Cells for Liquid-Phase Electron Microscopy

Published on: September 21, 2020

Head Implants for the Neuroimaging of Awake, Head-Fixed Rats

Head Implants for the Neuroimaging of Awake, Head-Fixed Rats

Published on: September 7, 2022

Related Experiment Videos

Last Updated: Feb 15, 2026

Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock

Fixed Volume or Fixed Pressure: A Murine Model of Hemorrhagic Shock

Published on: June 6, 2011

Graphene Enclosure of Chemically Fixed Mammalian Cells for Liquid-Phase Electron Microscopy

Graphene Enclosure of Chemically Fixed Mammalian Cells for Liquid-Phase Electron Microscopy

Published on: September 21, 2020

Head Implants for the Neuroimaging of Awake, Head-Fixed Rats

Head Implants for the Neuroimaging of Awake, Head-Fixed Rats

Published on: September 7, 2022

Area of Science:

Quantum Monte Carlo methods
Computational physics
Electronic structure theory

Background:

The fixed-node approximation is a standard but sometimes problematic method in quantum Monte Carlo simulations.
Nodal boundary conditions can be complex and lead to artificial errors in calculations.
Spinor wave functions are essential for describing systems with spin-dependent interactions.

Purpose of the Study:

To investigate the fixed-phase spinor diffusion Monte Carlo method.
To compare its performance and properties against the established fixed-node method.
To explore its potential as a general electronic structure calculation technique.

Main Methods:

Developing and applying spinor-based wave functions with full space-spin symmetry.
Utilizing the fixed-phase approximation to simplify calculations.
Comparing fixed-phase results with fixed-node results for first-row systems.

Main Results:

The fixed-phase method can achieve the fixed-node limit under specific conditions.
Fixed-phase calculations offer a more intuitive interpretation as bosonic states.
Complexifying wave functions smooths out divergences and reduces sampling variations.
Calculations on first-row systems show quantitative agreement with fixed-node results.

Conclusions:

The fixed-phase approximation presents advantages over the fixed-node method, including simpler interpretation and reduced errors.
It offers a more general and potentially more accurate approach for electronic structure calculations.
This method opens avenues for developing more sophisticated trial wave functions.