DISCLAIMER: This article is being kept online for historical purposes. Though accurate at last review, it is no longer being updated. The page may contain broken links or outdated information.
Quantum phase slip
Webster, Carol H. Quantum Detection Group, National Physical Laboratory, Teddington, Middlesex, United Kingdom.
- Charge-phase duality
- Technology and state of the art
- Possible applications
- Related Primary Literature
- Additional Reading
Quantum phase slip (QPS) is a phenomenon that occurs in ultranarrow superconducting nanowires and other superconducting nanostructures. In a superconductor cooled below its critical temperature Tc, electrical current can flow without resistance. However, when the radius of a superconducting nanowire is sufficiently small, quantum energy fluctuations can cause portions of the nanowire instantaneously to enter the normal resistive state. The superconducting state is characterized by a wave function with an amplitude and phase. During a quantum fluctuation, the amplitude drops temporarily to zero. When this occurs, the phase is undefined and can jump by a multiple of 2π (Fig. 1a). This is known as QPS and temporarily blocks the flow of current along the nanowire.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information