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...
Magnetic Field due to Moving Charges01:23

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...
Magnetic Moment of an Electron01:23

Magnetic Moment of an Electron

Electrons revolving around a nucleus are analogous to a circular current carrying loop. This current produces a magnetic dipole moment proportional to the electron's orbital angular momentum. Since the orbital angular momentum is quantized in terms of the reduced Planck's constant, the dipole moment is quantized in the Bohr Magneton. The value of the Bohr magneton is 9.27 x 10-24 Am2. Electrons also have an intrinsic spin angular momentum, and the associated spin magnetic moment is...
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
Magnetic Damping01:17

Magnetic Damping

Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
Magnetic Vector Potential01:15

Magnetic Vector Potential

In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...

You might also read

Related Articles

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

Sort by
Same author

Non-Local Parity Measurements and the Quantum Pigeonhole Effect.

Entropy (Basel, Switzerland)·2020
Same author

Revealing Hidden Quantum Correlations in an Electromechanical Measurement.

Physical review letters·2019
Same author

Stabilized entanglement of massive mechanical oscillators.

Nature·2018
Same author

Flux-tunable heat sink for quantum electric circuits.

Scientific reports·2018
Same author

Quantum systems under frequency modulation.

Reports on progress in physics. Physical Society (Great Britain)·2017
Same author

Noiseless Quantum Measurement and Squeezing of Microwave Fields Utilizing Mechanical Vibrations.

Physical review letters·2017

Related Experiment Video

Updated: May 14, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Motional averaging in a superconducting qubit.

Jian Li1, M P Silveri, K S Kumar

  • 1O. V. Lounasmaa Laboratory, Aalto University School of Science, P.O. Box 15100, FI-00076 AALTO, Espoo, Finland.

Nature Communications
|January 31, 2013
PubMed
Summary

Superconducting quantum bits simulate motional averaging by rapidly switching energy levels. This quantum simulation merges spectral lines, advancing quantum technology development.

Related Experiment Videos

Last Updated: May 14, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Area of Science:

  • Quantum computing
  • Condensed matter physics
  • Quantum simulation

Background:

  • Superconducting circuits with Josephson junctions are key for quantum technologies.
  • Studying complex condensed-matter phenomena in these circuits is of significant interest.

Purpose of the Study:

  • To perform an analogue simulation of motional averaging using a superconducting transmon.
  • To investigate the effects of controllable pseudo-random telegraph noise on the transmon's energy levels.

Main Methods:

  • Utilized a superconducting transmon (quantum bit).
  • Modulated the flux bias with pseudo-random telegraph noise to induce stochastic jumps in energy level separation.
  • Analyzed spectral line merging and the emergence of motional-averaged lines.

Main Results:

  • Achieved motional averaging when noise modulation exceeded a dynamical threshold, merging spectral lines.
  • Observed a complex pattern of sidebands with sinusoidal modulation.
  • Demonstrated that the modulated system maintains quantum coherence with altered transition frequencies, Rabi couplings, and dephasing rates.

Conclusions:

  • This work demonstrates the first steps in using artificial atoms for advanced quantum simulations.
  • The findings pave the way for simulating complex quantum phenomena in superconducting circuits.
  • Analogue simulation of motional averaging in a transmon offers new insights into quantum dynamics.