Navigation Links
Discovery may overcome obstacle for quantum computing

Researchers have made a major advance in predicting and quashing environmental decoherence, a phenomenon that has proven to be one of the most formidable obstacles standing in the way of quantum computing.

The findings based on theoretical work conducted at the University of British Columbia and confirmed by experiments at the University of California Santa Barbara are published online in the July 20 issue of the journal Nature.

Quantum mechanics states that matter can be in more than one physical state at the same time like a coin simultaneously showing heads and tails. In small objects like electrons, physicists have had success in observing and controlling these simultaneous states, called "state superposition."

Larger, more complex physical systems appear to be in one consistent physical state because they interact and "entangle" with other objects in their environment. This entanglement makes these complex objects "decay" into a single state a process called decoherence.

Quantum computing's potential to be exponentially faster and more powerful than any conventional computer technology depends on switches that are capable of state superposition that is, being in the "on" and "off" positions at the same time. Until now, all efforts to achieve such superposition with many molecules at once were blocked by decoherence.

"For the first time we've been able to predict and control all the environmental decoherence mechanisms in a very complex system, in this case a large magnetic molecule called the 'Iron-8 molecule,'" said Phil Stamp, UBC professor of physics and astronomy and director of the Pacific Institute of Theoretical Physics. "Our theory also predicted that we could suppress the decoherence, and push the decoherence rate in the experiment to levels far below the threshold necessary for quantum information processing, by applying high magnetic fields."

In the experiment, the California researchers prepared a crystalline array of Iron-8 molecules in a quantum superposition, where the net magnetization of each molecule was simultaneously oriented up and down. The decay of this superposition by decoherence was then observed in time and the decay was spectacularly slow, behaving exactly as the UBC researchers predicted.

"Magnetic molecules now suddenly appear to have serious potential as candidates for quantum computing hardware," said Susumu Takahashi, assistant professor of chemistry and physics at the University of Southern California. "This opens up a whole new area of experimental investigation with sizeable potential in applications, as well as for fundamental work."

Takahashi conducted the experiments while at UC Santa Barbara and analyzed the data while at UC Santa Barbara and the University of Southern California.

"Decoherence helps bridge the quantum universe of the atom and the classical universe of the everyday objects we interact with," Stamp said. "Our ability to understand everything from the atom to the Big Bang depends on understanding decoherence, and advances in quantum computing depend on our ability to control it."


Contact: Phil Stamp
University of British Columbia

Related biology technology :

1. Affitech and Omeros Enter Into Antibody Discovery and Development Agreement
2. Concentric Named Professional Agency of Record for Discovery Labs SURFAXIN(R)
3. ChanTest to Highlight the Worlds Largest Catalog of Ion Channel-Expressing Cell Lines and Discovery Services at Ion Channel Targets, Booth 5
4. Biotechnology & Drug Discovery Markets Push Up Demand for Lab Automation Products, According to a New Report by Global Industry Analysts
5. Assay Designs(TM), Inc. and the Spinal Muscular Atrophy Foundation Announce Collaboration To Accelerate the Discovery of New Therapeutics for Spinal Muscular Atrophy (SMA)
6. ChanTest to Highlight the Worlds Largest Catalog of Ion Channel-Expressing Cell Lines and Discovery Services at Assays & Cellular Targets Conference, Booth 11
7. Affitech Announces Second Milestone in Roche Antibody Discovery Collaboration
8. The Lilly TB Drug Discovery Initiative Begins Work on New Compounds to Fill Early-Stage TB Drug Pipeline
9. Update: The Lilly TB Drug Discovery Initiative Begins Work on New Compounds to Fill Early-Stage TB Drug Pipeline
10. deCODE Discovery Sheds Light on Risk of the Most Common Form of Skin Cancer
11. Global Drug Discovery Technologies Market to Exceed $57 Billion by 2012, According to a New Report by Global Industry Analysts
Post Your Comments:
(Date:6/27/2016)... -- Global demand for enzymes is forecast to grow ... billion.  This market includes enzymes used in industrial ... animal feed, and other markets) and specialty applications ... beverages will remain the largest market for enzymes, ... containing enzymes in developing regions.  These and other ...
(Date:6/27/2016)... , ... June 27, 2016 , ... Parallel 6 ... trials, announced today the Clinical Reach Virtual Patient Encounter CONSULT module which ... with the physician and clinical trial team. , Using the CONSULT module, patients and ...
(Date:6/27/2016)... , June 27, 2016   Ginkgo Bioworks ... to industrial engineering, was today awarded as one ... selection of the world,s most innovative companies. Ginkgo ... scale for the real world in the nutrition, ... engineers work directly with customers including Fortune 500 ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita ... miRNAs in people with peritoneal or pleural mesothelioma. Their findings are the subject of ... now. , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue ...
Breaking Biology Technology:
(Date:6/3/2016)... June 3, 2016 ... Nepal hat ein ... hochsicherer geprägter Kennzeichen, einschließlich Personalisierung, Registrierung und ... der Produktion und Implementierung von Identitätsmanagementlösungen. Zahlreiche ... im Januar teilgenommen, aber Decatur wurde als ...
(Date:6/1/2016)... 2016 Favorable Government Initiatives Coupled ... Criminal Identification to Boost Global Biometrics System Market Through ... Research report, " Global Biometrics Market By Type, ... Opportunities, 2011 - 2021", the global biometrics market is ... account of growing security concerns across various end use ...
(Date:5/12/2016)... May 12, 2016 , a ... the overview results from the Q1 wave of its ... wave was consumers, receptivity to a program where they ... a health insurance company. "We were surprised ... says Michael LaColla , CEO of Troubadour Research, ...
Breaking Biology News(10 mins):