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 Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

2.2K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
2.2K
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

1.4K
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.
1.4K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

850
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...
850
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.6K
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.
2.6K
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

1.6K
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:
1.6K
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

3.6K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
3.6K

You might also read

Related Articles

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

Sort by
Same author

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

Physical review letters·2026
Same author

Scalable Quantum Current Source on Commercial CMOS Process Technology.

Nano letters·2026
Same author

Assessment of intracellular complexity of monocyte through cell population data (CPD) can lead to early recognition of bloodstream infections.

Archives of microbiology·2026
Same author

Valley splitting correlations across a silicon quantum well containing germanium.

Nature communications·2025
Same author

Robust and localised control of a 10-spin qubit array in germanium.

Nature communications·2025
Same author

Operating two exchange-only qubits in parallel.

Nature·2025
Same journal

Spatiotemporal control of myoblast identity drives muscle diversity in the <i>Drosophila</i> leg.

Science advances·2026
Same journal

Stellar feedback drives the baryon deficiency in low-mass galaxies.

Science advances·2026
Same journal

Antiferroelectric thin films embedded with ferroelectric switching loop for giant negative electrocaloric effect.

Science advances·2026
Same journal

Tetraphosphorylated phthalocyanine-based self-assembled monolayer stabilizes perovskite photovoltaics.

Science advances·2026
Same journal

Dual-mode analysis of ischemic stroke based on urine SERS spectra and carotid B-ultrasound.

Science advances·2026
Same journal

Remote homology and functional genetics unmask deeply preserved Scm3/HJURP orthologs in metazoans.

Science advances·2026
See all related articles

Related Experiment Video

Updated: Mar 29, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

15.5K

Electrically controlling single-spin qubits in a continuous microwave field.

Arne Laucht1, Juha T Muhonen1, Fahd A Mohiyaddin1

  • 1Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia.

Science Advances
|November 25, 2015
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate precise quantum control of single phosphorus-31 (31P) atoms in silicon using electrostatic gates and microwave fields. This A-gate control method enables scalable quantum computing by preserving qubit coherence and fidelity.

Keywords:
Local electrical controlMagnetic resonancePhosphorus donorQuantum computingSilicon nanoelectronicsSingle-atom spin qubits

More Related Videos

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

12.1K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

13.3K

Related Experiment Videos

Last Updated: Mar 29, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

15.5K
Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

12.1K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

13.3K

Area of Science:

  • Quantum Computing
  • Solid-State Physics
  • Atomic Physics

Background:

  • Scalable quantum computers require highly coherent and locally controllable quantum bits (qubits).
  • Individual spins in silicon offer long coherence times but controlling them at scale is challenging.

Purpose of the Study:

  • To demonstrate a scalable method for quantum control of single spins in silicon.
  • To achieve high-fidelity control of both electron and nuclear spins of a single phosphorus-31 atom.

Main Methods:

  • Utilized a continuous microwave magnetic field and nanoscale electrostatic gates for qubit manipulation.
  • Employed A-gate control, inducing Stark shifts in qubit energies via local electric field changes to tune spins into resonance.
  • Focused on single (31)P atoms embedded in silicon.

Main Results:

  • Successfully demonstrated quantum control over both the electron and nuclear spin of a single (31)P atom.
  • A-gate control preserved excellent coherence times and gate fidelities characteristic of isolated spins.
  • The demonstrated method is extendable to large numbers of qubits without needing multiple microwave sources.

Conclusions:

  • A-gate control provides a viable pathway for scalable quantum computing architectures.
  • This technique overcomes limitations of previous methods by enabling local control without compromising qubit quality.
  • The approach is compatible with existing silicon fabrication technologies, facilitating integration into larger systems.