Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Quantum Future: GTRI Researchers are Designing and Testing Microfabricated Planar Ion Traps

Optical microscope image of an ion trap designed at GTRI. The dark rectangle is the loading slot that calcium atoms stream through before they are hit with a laser and trapped. Credit: Charlie Doret
Optical microscope image of an ion trap designed at GTRI. The dark rectangle is the loading slot that calcium atoms stream through before they are hit with a laser and trapped. Credit: Charlie Doret

Abstract:
Despite a steady improvement in the speed of conventional computers during the last few decades, certain types of problems remain computationally difficult to solve. Quantum computers hold the promise of offering a new route to solving some classes of these problems, such as breaking encryptions. The tremendous computing power of these devices stems from their use of quantum systems, called "qubits," which can exist in a "superposition" of two states at the same time - in stark contrast to the transistors in conventional computers that can only be in the state "0" or "1".

By Abby Vogel

Quantum Future: GTRI Researchers are Designing and Testing Microfabricated Planar Ion Traps

Atlanta, GA | Posted on May 27th, 2010

"Though a practical quantum computer may still be decades away, research being conducted today is laying the groundwork for such a device by bridging the vast gap between the theory and practice of quantum information processing," said Dick Slusher, a principal research scientist at the Georgia Tech Research Institute (GTRI) and director of the Georgia Tech Quantum Institute.

One path toward creating quantum computers is to use trapped ions as the qubits. However, it is currently difficult to scale up conventional ion traps into an array large enough to create a useful quantum computer.

At GTRI, researchers are designing, fabricating and testing planar ion traps that can be more readily combined into large, interconnected trap arrays. Details of the research effort, led by Slusher and GTRI senior research scientist Alexa Harter, were presented at the annual meeting of the American Physical Society's Division of Atomic Molecular and Optical Physics on May 26 and 27.

The presentations were made by GTRI postdoctoral fellow Charlie Doret, GTRI research scientist Arkadas Ozakin and Georgia Tech electrical and computer engineering graduate student Fayaz Shaikh. This research is funded by the Intelligence Advanced Research Projects Activity (IARPA) and the Defense Advanced Research Projects Agency (DARPA) through contracts with the Army Research Office.

GTRI's microfabricated planar ion traps employ a combination of radio-frequency signals and static voltages applied to aluminum electrodes that are layered on silicon wafers.

"These planar trap geometries are advantageous because they are scalable to large systems of ions and also offer improved laser access compared to currently available traps," said Doret.

Lasers are applied to the ions to induce "entanglement" - a quantum mechanical property whereby the states involved cannot be completely described independently. Using systems of trapped ions, researchers have measured entanglement clearly and can preserve it for extended periods of time. To date, however, the largest number of entangled particles ever achieved in a quantum computer is eight calcium ions. At least thirty ions are required to perform calculations that cannot be realized on a classical computer, so a major challenge for the future is to increase the number of trapped ions that can interact.

The GTRI team has used state-of-the-art computer simulations of the electromagnetic trapping fields and the trapped ion motion to design versatile traps capable of holding many ions. Trap designs were improved using genetic algorithms that fed back to the shapes and spacing of trap electrodes to optimize trap depth and minimize heating when ions were transported between trapping zones.

Prototypes of the designs were fabricated with the help of Kevin Martin, a principal research scientist in the Georgia Tech Nanotechnology Research Center. The research team then tested the prototypes in GTRI's ion trapping laboratory, where calcium ions were first trapped in October 2009 using devices designed and fabricated at Georgia Tech.

Experimental data on trap loading efficiency, ion lifetime and ion shuttling efficiency were used to validate the designs and provide feedback for additional improvements.

The GTRI team is working with researchers at Duke University to integrate optics directly into the ion traps, while researchers at the Massachusetts Institute of Technology are testing the devices in a cryogenic environment.

In collaboration with the University of Maryland, GTRI researchers are also investigating the use of an array of trapped ions and/or ultra-cold atoms trapped in optical lattices for applications in quantum simulation.

"We still have much to learn about individual quantum systems, how to connect them, how to control them, how to measure them and how to fix the inevitable errors," added Slusher.

Future work at GTRI will include testing new trap designs, such as linear traps optimized for holding long ion chains.

"This field requires a multidisciplinary effort and Georgia Tech has the synergy and strengths in the technology and science areas and the fabrication facilities to make real progress," added Slusher.

This material is based upon work supported by the Intelligence Advanced Research Projects Activity (IARPA) Scaled Multiplexed Ion Trap project under U.S. Army Award No. W911NF-08-1-0315, and the Defense Advanced Research Projects Agency (DARPA) Optical Lattice Emulator program under U.S. Army Award No. W911NF-07-1-0576. Any opinions, findings, conclusions or recommendations expressed in this article are those of the researchers and do not necessarily reflect the views of the U.S. Army.

####

For more information, please click here

Contacts:
Media Relations Contacts:
Abby Vogel

404-385-3364

John Toon

404-894-6986

Kirk Englehardt

404-407-7280

Copyright © Georgia Tech Research Institute

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 News Press

News and information

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Arrowhead Pharmaceuticals to Webcast Fiscal 2017 Second Quarter Results April 27th, 2017

Govt.-Legislation/Regulation/Funding/Policy

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Graphene holds up under high pressure: Used in filtration membranes, ultrathin material could help make desalination more productive April 24th, 2017

Nanoparticle vaccine shows potential as immunotherapy to fight multiple cancer types April 24th, 2017

Possible Futures

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Video captures bubble-blowing battery in action: Researchers propose how bubbles form, could lead to smaller lithium-air batteries April 26th, 2017

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

Geoffrey Beach: Drawn to explore magnetism: Materials researcher is working on the magnetic memory of the future April 25th, 2017

Academic/Education

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

SUNY Polytechnic Institute Announces Total of 172 Teams Selected to Compete in Solar in Your Community Challenge: Teams from 40 states, plus Washington, DC, 2 Territories, and 4 American Indian Reservations, Will Deploy Solar in Underserved Communities April 20th, 2017

Rice crew revved for Nanocar Race: Nanocar creator James Tour and team take on international competition with single-molecule marvel April 20th, 2017

The Catholic University of Rome uses the JPK NanoWizardŽ AFM & CellHesionŽ systems to understand how cells sense and respond to mechanical stimuli April 5th, 2017

Quantum Computing

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Harris & Harris Group Issues Its Financial Statements as of December 31, 2016, Posts Its Annual Shareholder Letter, And Will Host a Conference Call for Shareholders on Friday, March 17, 2017 March 15th, 2017

Sorting machine for atoms:Researchers at the University of Bonn clear a further hurdle on the path to creating quantum computers February 10th, 2017

First ever blueprint unveiled to construct a large scale quantum computer February 3rd, 2017

Announcements

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Arrowhead Pharmaceuticals to Webcast Fiscal 2017 Second Quarter Results April 27th, 2017

Research partnerships

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

Better living through pressure: Functional nanomaterials made easy April 19th, 2017

Shedding light on the absorption of light by titanium dioxide April 14th, 2017

AIM Photonics Presents Cutting-Edge Integrated Photonics Technology Developments to Packed House at OFC 2017, the Optical Networking and Communication Conference & Exhibition April 11th, 2017

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