Navigation Links
Evidence of macroscopic quantum tunneling detected in nanowires
Date:5/27/2009

CHAMPAIGN, Ill. A team of researchers at the University of Illinois has demonstrated that, counter to classical Newtonian mechanics, an entire collection of superconducting electrons in an ultrathin superconducting wire is able to "tunnel" as a pack from a state with a higher electrical current to one with a notably lower current, providing more evidence of the phenomenon of macroscopic quantum tunneling.

Physics professors Alexey Bezryadin and Paul Goldbart led the team, with graduate student Mitrabhanu Sahu performing the bulk of the measurements. Their research was published on the Web site of the journal Nature Physics on May 17.

Quantum tunneling is the capability of a particle to inhabit regions of space that would normally be off-limits according to classical mechanics. This research observes a process called a quantum phase slip, whereby packs of roughly 100,000 electrons tunnel together from higher electrical current states to lower ones. The energy locked in the motion of the electrons as they phase slip is dissipated as heat, causing the nanowires to switch from a superconducting state to a more highly resistive one.

It's through this switching of states that allows the tunneling of the phase slip to be observed, the researchers say.

Goldbart, who is also a researcher at the university's Frederick Seitz Materials Research Laboratory, describes a quantum phase slip as a phenomenon that allows the spatially extended structure of superconductivity "to undergo a kind of quantum mechanical rip or tear, one where the entire extended behavior of the superconductivity tunnels its way through a classically forbidden set of configurations."

"Semiconductors, insulators and metals all hinge upon the ability of particles to make it through classically forbidden regions, despite apparently having negative kinetic energy there, as quantum physics allows," Goldbart said.

In Newton's world, according to
'/>"/>

Contact: Phil Ciciora
pciciora@illinois.edu
217-333-2177
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. CPM Resource Center and The Shams Group Partner To Help Hospitals Integrate Evidence-Based Clinical Content Into Information Systems
2. MichBio Leader Cites New Senate Biosciences Task Force and House Subcommittee as Evidence of States Growing Awareness of Industrys Economic Importance
3. ULURU to Present Clinical Evidence and Advanced Research on Altrazeal at the Society for Advance Wound Care Conference for 2009
4. Agendia Publishes Direct Evidence That MammaPrint Predicts Benefit of Chemotherapy in Breast Cancer
5. Evidence of Ancient Hot Springs on Mars Detailed in Astrobiology Journal
6. Cancer Clinics of Excellence (CCE) Releases 62nd Evidence-Based Treatment Protocol
7. The Lancets New Online Medical Journal Helps Clinicians and Medical Researchers Find Practice-Changing Evidence Quickly and Easily
8. More Evidence Published That Epidemics of Childhood Obesity, Type 2 Diabetes and Metabolic Syndrome are Linked to Immunization
9. Kaiser Permanente Study Shows Newer, Stronger Evidence That Caffeine During Pregnancy Increases Miscarriage Risk
10. Revolutionary Genomics Research Group Opens Boston Office; Provides DNA Evidence in Workers Comp Cases
11. PDL BioPharma Announces Internal CEO Investigation Found No Credible Evidence of Improper Personal Conduct or Breach of Fiduciary Duty
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Evidence of macroscopic quantum tunneling detected in nanowires
(Date:3/27/2015)... , March 27, 2015 WuXi PharmaTech ... open-access R&D capability and technology platform company serving ... announced today that an Investigational New Drug (IND) ... for rheumatoid arthritis has been accepted for review ... In September 2012, MedImmune, the ...
(Date:3/26/2015)... 26, 2015  Roka Bioscience, Inc. (NASDAQ: ... providing advanced testing solutions for the detection of ... the three months and full year ended December ... Results:Revenue for the quarter ended December 31, 2014 ... fourth quarter of 2013 and $1.5 million for ...
(Date:3/26/2015)... 2015 The Market Element LLC, a ... alliance with Designing Gig LLC to provide website design, ... , “Forging this alliance with Designing Gig represents a ... extend a comprehensive, end-to-end, digital solution for our clients, ... said Chuck Miller, president of The Market Element. “For ...
(Date:3/26/2015)... Neogen Corporation (NASDAQ: NEOG ) announced ... of fiscal 2015, which ended Feb. 28, increased 13% ... Earnings per share in the current quarter were $0.20, ... income increased 17% over prior year to $24,142,000, or ... share, for the same period a year ago. ...
Breaking Biology Technology:Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 2Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 3Roka Bioscience Reports Fourth Quarter and Full Year 2014 Financial Results 2Roka Bioscience Reports Fourth Quarter and Full Year 2014 Financial Results 3Roka Bioscience Reports Fourth Quarter and Full Year 2014 Financial Results 4Roka Bioscience Reports Fourth Quarter and Full Year 2014 Financial Results 5Roka Bioscience Reports Fourth Quarter and Full Year 2014 Financial Results 6Roka Bioscience Reports Fourth Quarter and Full Year 2014 Financial Results 7The Market Element LLC and Designing Gig LLC Form Strategic Alliance 2Neogen reports 13% increase in net income 2Neogen reports 13% increase in net income 3Neogen reports 13% increase in net income 4Neogen reports 13% increase in net income 5Neogen reports 13% increase in net income 6Neogen reports 13% increase in net income 7Neogen reports 13% increase in net income 8
... Leader Strengthens Scaffold-Engineering Capabilities ... Electrospinning Platform Technology & Team, CANTON, Mass. ... the world,s most successful regenerative medicine,company, announced today ... NanoMatrix,s platform technology develops "designer scaffolds" for the,purposes ...
... latest Rainbow SET(R) parameter at the upcoming World ... Congress of Anesthesiologists ... inventor,of Pulse CO-Oximetry(TM) and Measure-Through Motion and Low Perfusion ... for,noninvasive and continuous total hemoglobin (SpHb(TM)) and oxygen content,(SpOC(TM)) ...
... t2cure, a clinical,stage biopharmaceutical company developing novel ... that it has appointed,Dr. Petra Rueck Head of ... Petra join our company", said Manfred Ruediger,CEO of ... will be of critical importance to t2cure as ...
Cached Biology Technology:Organogenesis, Inc. Announces Acquisition of NanoMatrix, Inc. 2Organogenesis, Inc. Announces Acquisition of NanoMatrix, Inc. 3Masimo Announces Continuous Noninvasive Total Hemoglobin 2Masimo Announces Continuous Noninvasive Total Hemoglobin 3Masimo Announces Continuous Noninvasive Total Hemoglobin 4Stem Cell Company t2cure Appoints Dr Rueck Head of Clinical Operations 2
(Date:3/17/2015)... YORK , March 17, 2015  MecklerMedia ... the largest exhibition for service robots ever held ... RoboUniverse takes place on May 11-13, 2015 at ... and exhibitors for the event include: Acorn Product ... Control; EZ-Robot; Infranor; Kinova Robotics; Littler; NewBotic Corporation; ...
(Date:3/12/2015)... March 12, 2015 WHEN:Tuesday, March 17, 2015 ... http://bit.ly/1G7Os0L . SPEAKERS: , Frost & Sullivan ... http://photos.prnewswire.com/prnh/20150311/181111 Biometric companies must ... in several different markets and industries. This is ... an uptrend. Join Frost & ...
(Date:3/10/2015)... PROVO, Utah , March 10, 2015   ... genome interpretation, has been selected by next-generation sequencing company ... provider of whole exome and targeted gene panel interpretation. ... sequencing provider, has adopted the most current technologies to ... of genetic research. The company offers two types of ...
Breaking Biology News(10 mins):MecklerMedia's RoboUniverse New York Announces Sponsors and Exhibitors, May 11-13, 2015 2Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 2Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 3PrimBio Research Selects Tute as Whole Exome Analysis Provider, Creating Integrated, End-to-End Solution for Next-Generation Sequencing & Data Analysis 2PrimBio Research Selects Tute as Whole Exome Analysis Provider, Creating Integrated, End-to-End Solution for Next-Generation Sequencing & Data Analysis 3
... advance vaccines for related viruses including dengue fever. A ... West Nile virus has an intriguing secret: Contrary to ... to attach to host cells. Instead, the antibody somehow ... , "This was a complete surprise to us, but ...
... compound derived from cottonseed could help improve the effectiveness ... at the University of Michigan Comprehensive Cancer Center have ... issue of the journal Molecular Cancer Therapeutics, could lead ... surgically removing the cancer, helping patients preserve vital organs ...
... McKnight Brain Institute have created a system in rodent ... the process of generating new brain cells -- in ... of the National Academy of Sciences, researchers describe a ... a limitless supply of a person's own brain cells ...
Cached Biology News:Secrets to antibody's success against West Nile Virus surprise scientists 2Secrets to antibody's success against West Nile Virus surprise scientists 3Secrets to antibody's success against West Nile Virus surprise scientists 4Compound from Chinese medicine shows promise in head and neck cancer 2Compound from Chinese medicine shows promise in head and neck cancer 3For first time, brain cells generated in a dish 2For first time, brain cells generated in a dish 3
...
Mouse monoclonal [RL13] to LAP1 ( Abpromise for all tested applications). SwissProtID: Q96NW7...
CircuLex Anti-Human S100P Polyclonal Antibody Research Focus: proliferation Storage: -20C Shipping Temperature: 4C...
Mouse monoclonal [7E10] to C Peptide ( Abpromise for all tested applications). entrezGeneID: 3630 SwissProtID: P01308...
Biology Products: