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

Magnetic Fields

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...

Magnetic Field of a Solenoid

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...

Magnetic Field Lines

Magnetic Field Lines

The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:

Energy In A Magnetic Field

Energy In A Magnetic Field

If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...

Magnetic Field Of A Current Loop

Magnetic Field Of A Current Loop

Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.

Magnetic Field due to Moving Charges

Magnetic Field due to Moving Charges

A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...

You might also read

Related Articles

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

Sort by

Same author

Filter circuit for suppression of electric-field noise in Rydberg-atom experiments.

The Review of scientific instruments·2025

Same author

Forbidden atomic transitions driven by an intensity-modulated laser trap.

Nature communications·2015

Same author

Ionization of Rydberg atoms by standing-wave light fields.

Nature communications·2013

Same author

Crocin and geniposide profiles and radical scavenging activity of gardenia fruits (Gardenia jasminoides Ellis) from different cultivars and at the various stages of maturation.

Fitoterapia·2009

Same author

Small-molecule screening using a human primary cell model of HIV latency identifies compounds that reverse latency without cellular activation.

The Journal of clinical investigation·2009

Same author

Berberine lowers blood glucose in type 2 diabetes mellitus patients through increasing insulin receptor expression.

Metabolism: clinical and experimental·2009

Search research articles

Related Experiment Video

Updated: Feb 2, 2026

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

Interplay between optical pumping and Rydberg EIT in magnetic fields.

Linjie Zhang, Shanxia Bao, Hao Zhang

|November 25, 2018

Summary

This summary is machine-generated.

Zeeman spectroscopy reveals magnetic field effects on Rydberg electromagnetically induced transparency (EIT) in cesium vapor. Quadratic Zeeman effects cause spectral asymmetry at higher magnetic fields.

More Related Videos

Assessing the Influence of Personality on Sensitivity to Magnetic Fields in Zebrafish

Assessing the Influence of Personality on Sensitivity to Magnetic Fields in Zebrafish

Published on: March 18, 2019

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Published on: May 22, 2020

Related Experiment Videos

Last Updated: Feb 2, 2026

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

Assessing the Influence of Personality on Sensitivity to Magnetic Fields in Zebrafish

Assessing the Influence of Personality on Sensitivity to Magnetic Fields in Zebrafish

Published on: March 18, 2019

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Published on: May 22, 2020

Area of Science:

Atomic Physics
Quantum Optics
Spectroscopy

Background:

Electromagnetically induced transparency (EIT) is a quantum interference phenomenon.
Rydberg atoms, with highly excited states, exhibit strong interactions with external fields.
Zeeman effects influence atomic energy levels in the presence of magnetic fields.

Purpose of the Study:

To investigate Zeeman spectroscopy of a Rydberg EIT system in a cesium vapor cell.
To analyze the influence of magnetic fields on EIT spectral properties.
To model the interplay between Rydberg EIT and optical pumping under magnetic fields.

Main Methods:

Performed Zeeman spectroscopy on a ladder-type Rydberg EIT system in a room-temperature Cs vapor cell.
Applied magnetic fields up to 50 Gauss.
Utilized a quantum Monte Carlo wave-function approach for spectral modeling.

Main Results:

Observed distinct magnetic interaction regimes: linear Zeeman, quadratic Zeeman, and Paschen-Back.
Demonstrated the dependence of Rydberg EIT spectra on magnetic field strength and polarization.
Identified significant spectral asymmetry due to the quadratic Zeeman effect of the intermediate state at ≥40 Gauss.

Conclusions:

The study elucidates the complex magnetic field dependencies in Rydberg EIT systems.
The quadratic Zeeman effect plays a crucial role in spectral asymmetry at higher magnetic fields.
Quantitative modeling accurately reproduces experimental observations, validating the theoretical approach.