Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
Atomic Spectroscopy: Effects of Temperature01:27

Atomic Spectroscopy: Effects of Temperature

Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Equilibrium Conditions for a Particle01:23

Equilibrium Conditions for a Particle

When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...

You might also read

Related Articles

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

Sort by
Same author

Mapping gene expression dynamics to developmental phenotypes with information entropy analysis.

NPJ systems biology and applications·2026
Same author

Critical Dynamics of the Anderson Transition on Small-World Graphs.

Physical review letters·2026
Same author

Quantum versus Classical Thermal Transport at Low Temperatures.

Physical review letters·2026
Same author

Non-Hermitian entanglement dip from scaling-induced exceptional criticality.

Science bulletin·2025
Same author

Geometrical representation of dynamical symmetries in ordinal pattern analysis of time series.

Physical review. E·2025
Same author

Enhancing Quantum Metrology by Quantum Resonance Dynamics.

Physical review letters·2025

Related Experiment Video

Updated: Jul 6, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Controlling the ratchet effect for cold atoms.

Anatole Kenfack1, Jiangbin Gong, Arjendu K Pattanayak

  • 1Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Strasse 38, D-01187 Dresden, Germany.

Physical Review Letters
|March 21, 2008
PubMed
Summary

High-order quantum resonances can be achieved in cold atoms by strengthening a delta-kicking ratchet potential. These resonances create larger directed currents than low-order ones, offering control over quantum transport.

More Related Videos

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Related Experiment Videos

Last Updated: Jul 6, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Area of Science:

  • Quantum physics
  • Atomic physics
  • Quantum transport

Background:

  • Low-order quantum resonances have been observed in cold atoms, leading to directed currents.
  • Controlling quantum transport is a key challenge in atomic physics.

Purpose of the Study:

  • To investigate the emergence of high-order quantum resonances in a delta-kicking ratchet potential.
  • To demonstrate that high-order resonances can induce larger ratchet currents than low-order ones.
  • To explore the potential for controlling quantum transport of cold atoms.

Main Methods:

  • Utilizing an experimentally achievable delta-kicking ratchet potential.
  • Increasing the strength of the ratchet potential to induce high-order quantum resonances.
  • Analyzing the resulting ratchet currents and comparing them to low-order resonances.

Main Results:

  • High-order quantum resonances naturally emerge with increasing ratchet potential strength.
  • These high-order resonances induce larger ratchet currents compared to low-order resonances.
  • The underlying classical limit of the system is fully chaotic.

Conclusions:

  • The strength of a delta-kicking ratchet potential can be used to control the emergence of high-order quantum resonances.
  • High-order quantum resonances offer a mechanism for enhancing directed currents in cold atom systems.
  • This work provides a novel method for controlling quantum transport of cold atoms.