Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Beyond quantum simulation: JILA physicists create 'crystal' of spin-swapping ultracold gas molecules

This is an illustration of the interaction energies between ultracold potassium-rubidium molecules trapped in a lattice made of intersecting laser beams. The colors indicate each molecule's interaction with the molecule located in the center of the lattice (green), for a specific magnetic-field direction (purple arrow). Blue indicates attractive interactions, and red indicates repulsive interactions. Darker colors indicate higher interaction energy.

Credit: Jacob Covey, JILA
This is an illustration of the interaction energies between ultracold potassium-rubidium molecules trapped in a lattice made of intersecting laser beams. The colors indicate each molecule's interaction with the molecule located in the center of the lattice (green), for a specific magnetic-field direction (purple arrow). Blue indicates attractive interactions, and red indicates repulsive interactions. Darker colors indicate higher interaction energy.

Credit: Jacob Covey, JILA

Abstract:
Physicists at JILA have created a crystal-like arrangement of ultracold gas molecules that can swap quantum "spin" properties with nearby and distant partners. The novel structure might be used to simulate or even invent new materials that derive exotic properties from quantum spin behavior, for electronics or other practical applications.

Beyond quantum simulation: JILA physicists create 'crystal' of spin-swapping ultracold gas molecules

Boulder, CO | Posted on September 18th, 2013

Described in a Nature paper* posted online on Sept. 18, 2013, the JILA experiment is the first to record ultracold gas molecules exchanging spins at a distance, a behavior that may be similar to that of intriguing solids such as "frustrated" magnets with competing internal forces, or high-temperature superconductors, which transmit electricity without resistance. The new results build on the same JILA team's prior creation of the first molecular quantum gases and demonstrations of ultracold chemistry.**

JILA is a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado Boulder.

"One of the main thrusts for our cold molecules research was to realize this interaction, so this is a major breakthrough," NIST/JILA Fellow Jun Ye says. "We can now explore very exotic new phases of quantum systems." NIST/JILA Fellow Deborah Jin points out that "these interactions are advantageous for creating models of quantum magnetism because they do not require the molecules to move around" the crystal structure.

The new JILA crystal has advantages over other experimental quantum simulators, which typically use atoms. Molecules, made of two or more atoms, have a broader range of properties, and thus, might be used to simulate more complex materials. Jin and Ye are especially interested in using the structure to create new materials not found in nature. An example might be topological insulators—a hot topic in physics—which might transmit data encoded in various spin patterns in future transistors, sensors or quantum computers.

The molecules used in the JILA experiments are made of one potassium atom bonded to one rubidium atom. The molecules are polar, with a positive electric charge at the rubidium end and a negative charge at the potassium end. This feature means the molecules can interact strongly and can be controlled with electric fields.

In the latest experiment, about 20,000 molecules were trapped in an optical lattice, an ordered pattern that looks like a stack of egg cartons created by intersecting laser beams. The lattice was only partly filled, with about one molecule per every 10 lattice wells. The lattice suppressed the molecules' travel and chemical reactions, allowing their internal properties to guide interactions.

The JILA team used microwave pulses to manipulate the molecules' spins, or natural rotations around an axis—similar to a spinning top—to create a "superposition" of two opposite spins at the same time. Scientists then observed oscillating patterns in the average spin of all the molecules, as well as a falloff or decay in the spin signal over time, indicating the molecules were swapping spins.

Scientists calculated the interaction energy that each molecule experiences with all other molecules in the lattice, with the energy intensity depending on the distance and angle between pairs (see graphic). JILA theorist Ana Maria Ray's modeling of spin oscillations and time periods agreed with the experimental measurements. Ye says the spin-swapping interactions "entangle" the molecules, a signature feature of the quantum world that links the properties of physically separated particles.

The results are expected to open up a new field in which scientists create customized molecular spin models in solid-like structures held in place by the lattice. JILA scientists plan to fill the lattice more fully and add an external electric field to increase the variety of spin models that can be created.

###

The research was funded by NIST, the National Science Foundation, the Air Force Office of Scientific Research, the Army Research Office, the Department of Energy and the Defense Advanced Research Projects Agency.

* B. Yan, S.A. Moses, B. Gadway, J.P. Covey, K.R.A. Hazzard, A.M. Rey, D.S. Jin and J. Ye. Realizing a lattice spin model with polar molecules. Nature. Advance Online Publication, Sept. 18, 2013.

####

For more information, please click here

Contacts:
Laura Ost

303-497-4880

Copyright © National Institute of Standards and Technology (NIST)

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

** See 2008 NIST news release, "JILA Scientists Create First Dense Gas of Ultracold 'Polar' Molecules," at:

2010 NIST news release, "Seeing the Quantum in Chemistry" JILA Scientists Control Chemical Reactions of Ultracold Molecules," at:

Related News Press

News and information

New research project supports internationalisation in nano-research: Launch of new “Baltic Sea Network” November 22nd, 2014

3rd Iran-Proposed Nano Standard Approved by International Standard Organization November 22nd, 2014

NMTI announces breakthrough solutions for HAMR nanoantenna for next-generation ultra-high density magnetic storage November 21st, 2014

Canatu Launches CNB In-Mold Film for Transparent Touch on 3D Surfaces –in Cars, Household Appliances, Wearables, Portables November 20th, 2014

Laboratories

NRL Scientists Discover Novel Metamaterial Properties within Hexagonal Boron Nitride November 20th, 2014

Brookhaven Science Associates Awarded Brookhaven Lab Management Contract Battelle/Stony Brook University partnership retains contract it has held since 1998 November 13th, 2014

SUNY Poly Student Awarded Fellowship with the U.S. Department of Energy's Postgraduate Research Program: Ph.D. Candidate Accepts Postmaster's Appointment To Conduct Research At Albany NanoTech Complex November 13th, 2014

Energy Department Awards New Contract to Manage and Operate Brookhaven National Laboratory November 12th, 2014

Physics

Researchers discern the shapes of high-order Brownian motions November 17th, 2014

Govt.-Legislation/Regulation/Funding/Policy

New research project supports internationalisation in nano-research: Launch of new “Baltic Sea Network” November 22nd, 2014

3rd Iran-Proposed Nano Standard Approved by International Standard Organization November 22nd, 2014

NMTI announces breakthrough solutions for HAMR nanoantenna for next-generation ultra-high density magnetic storage November 21st, 2014

Quantum mechanical calculations reveal the hidden states of enzyme active sites November 20th, 2014

Discoveries

NMTI announces breakthrough solutions for HAMR nanoantenna for next-generation ultra-high density magnetic storage November 21st, 2014

UO-industry collaboration points to improved nanomaterials: University of Oregon microscope puts spotlight on the surface structure of quantum dots for designing new solar devices November 20th, 2014

Silver Nanoparticles Produced in Iran from Forest Plants Extract November 20th, 2014

Nano Sorbents Able to Remove Pollutions Caused by Oil Derivatives November 20th, 2014

Announcements

New research project supports internationalisation in nano-research: Launch of new “Baltic Sea Network” November 22nd, 2014

3rd Iran-Proposed Nano Standard Approved by International Standard Organization November 22nd, 2014

NMTI announces breakthrough solutions for HAMR nanoantenna for next-generation ultra-high density magnetic storage November 21st, 2014

Nano Sorbents Able to Remove Pollutions Caused by Oil Derivatives November 20th, 2014

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

NMTI announces breakthrough solutions for HAMR nanoantenna for next-generation ultra-high density magnetic storage November 21st, 2014

Quantum mechanical calculations reveal the hidden states of enzyme active sites November 20th, 2014

UO-industry collaboration points to improved nanomaterials: University of Oregon microscope puts spotlight on the surface structure of quantum dots for designing new solar devices November 20th, 2014

Silver Nanoparticles Produced in Iran from Forest Plants Extract November 20th, 2014

Military

NRL Scientists Discover Novel Metamaterial Properties within Hexagonal Boron Nitride November 20th, 2014

Two sensors in one: Nanoparticles that enable both MRI and fluorescent imaging could monitor cancer, other diseases November 18th, 2014

Researchers create & control spin waves, lifting prospects for enhanced info processing November 17th, 2014

Penn engineers efficiently 'mix' light at the nanoscale November 17th, 2014

Quantum nanoscience

Quantum mechanical calculations reveal the hidden states of enzyme active sites November 20th, 2014

Pseudospin-driven spin relaxation mechanism in graphene November 11th, 2014

Heat Transfer Sets the Noise Floor for Ultrasensitive Electronics November 11th, 2014

On-demand conductivity for graphene nanoribbons: Physicists from Uzbekistan and Germany have devised a theoretical model to tune the conductivity of graphene zigzag nanoribbons using ultra-short pulses November 10th, 2014

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




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More












ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE