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

Dimensionless Groups in Fluid Mechanics

Dimensionless Groups in Fluid Mechanics

Dimensionless groups in fluid mechanics provide simplified ratios that help analyze fluid behavior without relying on specific units. The Reynolds number (Re), which represents the ratio of inertial to viscous forces, distinguishes between laminar and turbulent flows, making it essential in the design of pipelines and aerodynamic surfaces. The Froude number (Fr), the ratio of inertial to gravitational forces, is particularly useful in predicting wave formation and hydraulic jumps in...

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. Schrödinger...

Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

Pressure Variation in a Fluid at Rest

Pressure Variation in a Fluid at Rest

In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in pressure...

Viscosity of Fluid

Viscosity of Fluid

Viscosity measures the resistance a fluid offers to flow and deformation. It results from internal friction between layers of fluid moving relative to one another. Dynamic viscosity, denoted by the Greek letter mu (μ), quantifies the force needed to move one fluid layer over another. For Newtonian fluids like water and air, the relationship between the shearing stress and the rate of shearing strain is linear, meaning their viscosity remains constant regardless of the applied stress.

Deriving the Speed of Sound in a Liquid

Deriving the Speed of Sound in a Liquid

As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave propagating...

You might also read

Related Articles

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

Sort by

Same author

Intestinal motility shapes spatiotemporal patterns of enterohemorrhagic <i>Escherichia coli</i> colonization and virulence gene expression in the host gut.

Infection and immunity·2026

Same author

Using Mixed Methods Research to Optimize Healthy Lifestyle Intervention Adaptation for Web-based Delivery: A Pragmatic Approach.

Journal of mixed methods research·2026

Same author

Vacuum tunneling of vortices in two-dimensional <sup>4</sup>He superfluid films.

Proceedings of the National Academy of Sciences of the United States of America·2025

Same author

Fertility in lactating dairy cows following timed embryo transfer with fresh in vitro-produced embryos derived from conventional or sex-sorted semen.

Journal of dairy science·2025

Same author

Optimizing Exposure Measures in Large-Scale Household Air Pollution Studies: Results from the Multicountry HAPIN Trial.

Environmental science & technology·2025

Same author

Quantum Barkhausen noise induced by domain wall cotunneling.

Proceedings of the National Academy of Sciences of the United States of America·2024

Search research articles

Related Experiment Video

Updated: May 21, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

Quantum dynamics of a Bose superfluid vortex.

L Thompson¹, P C E Stamp

¹Department of Physics & Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada.

Physical Review Letters

|June 12, 2012

Summary

Quantum mechanics reveals new vortex behavior in Bose superfluids. Standard equations apply at low frequencies, but quantum effects cause significant delays at higher frequencies, impacting experiments.

Area of Science:

Quantum mechanics
Condensed matter physics
Bose-Einstein condensates

Background:

Vortices are fundamental excitations in superfluids.
Existing models (Hall-Vinen-Iordanskii) describe vortex dynamics classically.
Quantum effects become significant at low temperatures and high frequencies.

Purpose of the Study:

Derive a quantum mechanical equation of motion for vortices in 2D Bose superfluids.
Investigate the role of quasiparticle coupling.
Determine the validity of classical models under varying conditions.

Main Methods:

Developed a fully quantum-mechanical model.
Analyzed the coupling between vortex zero modes and quasiparticles.
Examined the behavior across different dimensionless frequencies (Ω).

More Related Videos

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Related Experiment Videos

Last Updated: May 21, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Main Results:

The lowest-order coupling between vortex zero modes and quasiparticles is quadratic, not linear.
Classical Hall-Vinen-Iordanskii equations are accurate only for Ω ≪ 1 (classical regime).
At Ω ≳ 1, quantum effects lead to highly retarded equations of motion.

Conclusions:

Quantum mechanics significantly modifies vortex dynamics in Bose superfluids at higher frequencies.
Classical models are insufficient outside the low-frequency regime.
The findings have important experimental implications for superfluid research.