Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > First report of real-time manipulation and control of nuclear spin noise

Abstract:
Basel Physicists in collaboration with Dutch researchers have demonstrated a new method for polarizing nuclear spins in extremely small samples. By Monitoring and controlling spin fluctuations, the method may provide a route for enhancing the resolution of magnetic resonance imaging (MRI) on the nanometer-scale, allowing researchers to make 3D images of smaller objects than ever before. The results have been published in the journal «Nature Physics».

First report of real-time manipulation and control of nuclear spin noise

Basel, Switzerland | Posted on August 26th, 2013

Many of the elements that make up the matter around us, such as hydrogen or phosphorus, contain a magnetic nucleus at the center of each atom. This nucleus acts like a tiny magnet with a north and south pole. By applying a large magnetic field, the poles of these nuclei align along the magnetic field, producing a so-called nuclear spin polarization.

When the nuclei are irradiated with electromagnetic impulses (radio waves) at a very specific frequency, they change their direction away from the magnetic field. Because they are magnetic, the nuclei then start turning back. As they do so, they emit the energy they had previously absorbed through the radio waves. With a special antenna these signals can be detected.

This method is called nuclear magnetic resonance (NMR) and can provide very useful information about a sample, such as its chemical composition or structure. The method also forms the basis of magnetic resonance imaging (MRI), which can make 3D images of the density of an object and is often used on patients in hospitals.

However, for very small objects (i.e. smaller than a single cell) containing a small number of nuclei, the natural fluctuations of the nuclear spin polarization actually become larger than the polarization produced by a large magnetic field. These deviations are known as «spin noise». The fact that spin noise is so dominant at small scales is one of the reasons why measuring NMR and MRI in very small objects is so difficult.

Monitoring, controlling and capturing
The team led by Prof. Martino Poggio from the University of Basel in Switzerland has now demonstrated, together with scientists from Eindhoven University of Technology and Delft University of Technology in the Netherlands, a method for creating polarization order from such random fluctuations. By monitoring, controlling, and capturing statistical spin fluctuations, the team produced polarizations that were much larger than what can be created by applying a magnetic field.

This is the first report of the real-time manipulation, control, and capture of fluctuations arising from nuclear spin noise. The results are immediately relevant to recent technical advances that have dramatically reduced the possible detection volumes of NMR measurements. «Improved understanding of these phenomena may lead to new high resolution nano- and atomic-scale imaging techniques», explains Poggio. The Basel method may provide a route for enhancing the sensitivity of nanometer-scale magnetic resonance imaging (MRI) or possibly for the implementation of solid-state quantum computers.

Further Implications
The method's ability to reduce nuclear spin polarization fluctuations may also be useful to enhance the coherence time of solid-state qubits. Qubits are units of quantum information used in quantum computers. Qubits implemented in the solid-state - especially in structures called quantum dots - are very susceptible to fluctuations in nuclear polarization: even tiny variations in the nuclear polarization destroy a qubit's coherence. Therefore, the ability to control these fluctuations may extend qubit coherence times and thus help in the on-going development of solid-state quantum computers. Poggio points out that his «approach to capture and store spin fluctuations is generally applicable to any technique capable of detecting and addressing nanometer-scale volumes of nuclear spins in real-time».

The study was supported by the Canton Aargau, the Swiss National Science Foundation (SNF), the Swiss Nanoscience Institute (SNI), and the National Center of Competence in Research for Quantum Science and Technology (QSIT).

####

For more information, please click here

Contacts:
Olivia Poisson


University of Basel
Communications Office
Petersgraben 35, Postfach
4003 Basel
Switzerland
Tel. +41 61 267 30 17
Fax +41 61 267 30 13

Copyright © University of Basel

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Original Citation

doi: 10.1038/nphys2731:

Related News Press

News and information

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Squeezing light at the nanoscale: Ultra-confined light could detect harmful molecules June 17th, 2018

Physicists devise method to reveal how light affects materials: The new method adds to the understanding of the fundamental laws governing the interaction of electrons and light June 15th, 2018

Tripling the Energy Storage of Lithium-Ion Batteries: Scientists have synthesized a new cathode material from iron fluoride that surpasses the capacity limits of traditional lithium-ion batteries June 14th, 2018

Nickel ferrite promotes capacity and cycle stability of lithium-sulfur battery June 13th, 2018

Imaging

New optical sensor can determine if molecules are left or right 'handed' June 13th, 2018

Nano-saturn: Supramolecular complex formation: Anthracene macrocycle and C60 fullerene June 8th, 2018

Scientists use photonic chip to make virtual movies of molecular motion June 6th, 2018

From Face Recognition to Phase Recognition: Neural Network Captures Atomic-Scale Rearrangements: Scientists use approach analogous to facial-recognition technology to track atomic-scale rearrangements relevant to phase changes, catalytic reactions, and more May 31st, 2018

Physics

Evidence for a new property of quantum matter revealed: Electrical dipole activity detected in a quantum material unlike any other tested June 11th, 2018

Govt.-Legislation/Regulation/Funding/Policy

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Squeezing light at the nanoscale: Ultra-confined light could detect harmful molecules June 17th, 2018

Tripling the Energy Storage of Lithium-Ion Batteries: Scientists have synthesized a new cathode material from iron fluoride that surpasses the capacity limits of traditional lithium-ion batteries June 14th, 2018

New optical sensor can determine if molecules are left or right 'handed' June 13th, 2018

Quantum Computing

Evidence for a new property of quantum matter revealed: Electrical dipole activity detected in a quantum material unlike any other tested June 11th, 2018

Tunable diamond string may hold key to quantum memory: A process similar to guitar tuning improves storage time of quantum memory May 24th, 2018

Deeper understanding of quantum chaos may be the key to quantum computers May 16th, 2018

New qubit now works without breaks: A universal design for superconducting qubits has been created April 19th, 2018

Discoveries

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Squeezing light at the nanoscale: Ultra-confined light could detect harmful molecules June 17th, 2018

Physicists devise method to reveal how light affects materials: The new method adds to the understanding of the fundamental laws governing the interaction of electrons and light June 15th, 2018

Tripling the Energy Storage of Lithium-Ion Batteries: Scientists have synthesized a new cathode material from iron fluoride that surpasses the capacity limits of traditional lithium-ion batteries June 14th, 2018

Announcements

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Squeezing light at the nanoscale: Ultra-confined light could detect harmful molecules June 17th, 2018

Physicists devise method to reveal how light affects materials: The new method adds to the understanding of the fundamental laws governing the interaction of electrons and light June 15th, 2018

Tripling the Energy Storage of Lithium-Ion Batteries: Scientists have synthesized a new cathode material from iron fluoride that surpasses the capacity limits of traditional lithium-ion batteries June 14th, 2018

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Camouflaged nanoparticles used to deliver killer protein to cancer June 17th, 2018

Squeezing light at the nanoscale: Ultra-confined light could detect harmful molecules June 17th, 2018

Physicists devise method to reveal how light affects materials: The new method adds to the understanding of the fundamental laws governing the interaction of electrons and light June 15th, 2018

Tripling the Energy Storage of Lithium-Ion Batteries: Scientists have synthesized a new cathode material from iron fluoride that surpasses the capacity limits of traditional lithium-ion batteries June 14th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project