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

Mass Analyzers: Overview01:13

Mass Analyzers: Overview

538
The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
538
Ferromagnetism01:31

Ferromagnetism

2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

598
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
598
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

526
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
526
Galvanometer01:25

Galvanometer

2.0K
Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform...
2.0K
Paramagnetism01:30

Paramagnetism

2.5K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.5K

You might also read

Related Articles

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

Sort by
Same author

Constraints on New Vector Boson Mediated Electron-Nucleus Interactions from Spectroscopy Data of Polar Diatomic Molecules.

Physical review letters·2026
Same author

Observation of Gyroscopic Coupling in a Nonspinning Levitated Ferromagnet.

Physical review letters·2026
Same author

Hyperpolarized Molecular Nuclear Spins Achieve Magnetic Amplification.

Physical review letters·2026
Same author

Zero- to ultralow-field J-spectroscopy with a diamond magnetometer.

Communications chemistry·2026
Same author

Oligonucleotide Selective Detection by Levitated Optomechanics.

ACS nanoscience Au·2026
Same author

Enabling nondestructive observation of electrolyte composition in batteries with ultralow-field nuclear magnetic resonance.

Chemical science·2026
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: May 15, 2025

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

2.6K

Levitated Ferromagnetic Magnetometer with Energy Resolution Well Below ℏ.

Felix Ahrens1,2, Wei Ji3,4,5, Dmitry Budker3,4,6

  • 1Istituto di Fotonica e Nanotecnologie IFN-CNR, 38123 Povo, Trento, Italy.

Physical Review Letters
|April 7, 2025
PubMed
Summary
This summary is machine-generated.

Researchers achieved unprecedented magnetic field measurement resolution using a levitated ferromagnet, surpassing the quantum limit. This breakthrough promises advancements in condensed matter physics, biophysics, and dark matter detection.

More Related Videos

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

1.9K
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

9.9K

Related Experiment Videos

Last Updated: May 15, 2025

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

2.6K
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

1.9K
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

9.9K

Area of Science:

  • Quantum sensing
  • Condensed matter physics
  • Fundamental science

Background:

  • A quantum limit (E_{R}≳ℏ) constrains magnetic field measurement resolution.
  • Existing quantum magnetometers like SQUIDs and atomic magnetometers adhere to this limit.
  • Highly correlated spin systems, such as spinor BECs, can surpass this established limit.

Purpose of the Study:

  • To investigate a novel method for surpassing the quantum limit in magnetic field measurements.
  • To demonstrate superior energy resolution using a levitated ferromagnet system.
  • To explore potential applications in condensed matter, biophysics, and dark matter searches.

Main Methods:

  • Utilizing a hard ferromagnet levitated above a superconductor at cryogenic temperatures.
  • Implementing quantum measurement techniques to achieve high energy resolution.
  • Proposing an experimental setup for axionlike dark matter detection.

Main Results:

  • Achieved an energy resolution of E_{R}=(0.064±0.010) ℏ, significantly below the quantum limit.
  • Demonstrated a system capable of surpassing the performance of conventional quantum magnetometers.
  • Projected potential for achieving E_{R}<10^{-3} ℏ with future improvements.

Conclusions:

  • The levitated ferromagnet system offers a pathway to overcome the established quantum limit for magnetic field measurements.
  • This technology holds promise for transformative applications across diverse scientific fields.
  • The proposed dark matter search experiment could achieve unprecedented sensitivity.