Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Marrying superconductors, lasers, and Bose-Einstein condensates: Chapman University Institute for Quantum Studies (IQS) member Yutaka Shikano, Ph.D., recently had research published in Scientific Reports

Abstract:
Chapman University Institute for Quantum Studies (IQS) member Yutaka Shikano, Ph.D., recently had research published in Scientific Reports. Superconductors are one of the most remarkable phenomena in physics, with amazing technological implications. Some of the technologies that would not be possible without superconductivity are extremely powerful magnets that levitate trains and MRI machines used to image the human body. The reason that superconductivity arises is now understood as a fundamentally quantum mechanical effect.

Marrying superconductors, lasers, and Bose-Einstein condensates: Chapman University Institute for Quantum Studies (IQS) member Yutaka Shikano, Ph.D., recently had research published in Scientific Reports

Orange, CA | Posted on June 20th, 2016

The basic idea of quantum mechanics is that at the microscopic scale everything, including matter and light, has a wave property to it. Normally the wave nature is not noticeable as the waves are very small, and all the waves are out of synchronization with each other, so that their effects are not important. For this reason, to observe quantum mechanical behavior experiments generally have to be performed at a very low temperature, and at microscopic length scales.

Superconductors, on the other hand, have a dramatic effect in the disappearance of resistance, changing the entire property of the material. The key quantum effect that occurs is that the quantum waves become highly synchronized and occur at a macroscopic level. This is now understood to be the same basic effect as that seen in lasers. The similarity is that in a laser, all the photons making up the light are synchronized, and appear as one single coherent wave. In a superconductor the macroscopic wave is for the quantum waves of the electrons, instead of the photons, but the basic quantum feature is the same. Such macroscopic quantum waves have also been observed in Bose-Einstein condensates, where atoms cooled to nanokelvin temperatures all collapse into a single state.

Up until now, these related but distinct phenomena have only been observed separately. However, as superconductors, lasers, and Bose-Einstein condensates all share a common feature, it has been expected that it should be able to see these features at the same time. A recent experiment in a global collaborative effort with teams from Japan, the United States, and Germany have observed for the first time experimental indication that this expectation is true.

They tackled this problem by highly exciting exciton-polaritons, which are particle-like excitations in a semiconductor systems and formed by strong coupling between electron-hole pairs and photons. They observed high-energy side-peak emission that cannot be explained by two mechanisms known to date: Bose-Einstein condensation of exciton-polaritons, nor conventional semiconductor lasing driven by the optical gain from unbound electron hole plasma.

By combining the experimental data with their latest theory, they found a possibility that the peak originates from a strongly bound e-h pairs, which can persist in the presence of the high-quality optical cavity even for the lasing state. This scenario has been thought to be impossible since an e-h pair experiencing weakened binding force due to other electrons and/or holes breaks up in high-density. The proposed scenario is closely related to the BCS physics, which was originally introduced by John Bardeen, Leon Cooper, and John Robert Schrieffer to explain the origin of superconductivity. In the BCS theory, the superconductivity is an effect caused by a condensation of weakly bound electron pairs (Cooper pairs). In the latest theory of e-h pairs plus photons (e-h-p), bound e-h pairs' survival can be described in BCS theory of e-h-p system as an analogy of Cooper pairs in superconductivity.

"Although a full understanding of this observation has not yet been reached," said Dr. Tomoyuki Horikiri at Yokohama National University, and one of the authors on the study. "The discovery provides an important step toward the clarification of the relationship between the BCS physics and the semiconductor lasers. The observation not only deepens the understanding of the highly-excited exciton-polariton systems, but also opens up a new avenue for exploring the non-equilibrium and dissipative many-body physics. In such practical application studies, there are still many quantum foundational questions."

###

The paper was published in Scientific Reports by Nature Publishing Group. In addition to Tomoyuki Horikiri, it was co-authored by Dr. Makoto Yamaguchi and Dr. Kenji Kamide and an international collaboration team including Tim Byrnes at New York University; Yutaka Shikano at Institute for Molecular Science, National Institutes of Natural Sciences and Institute for Quantum Studies, Chapman University; Tetsuya Ogawa at Osaka University; Alfred Forchel at Universität Würzburg, and YoshihisaYamamoto at Stanford University and National Institute of Informatics.

####

About Chapman University
Consistently ranked among the top universities in the West, Chapman University attracts highly qualified students from around the globe. Its programs are designed to encourage leadership in innovation, creativity and collaboration, and are increasingly recognized for providing an extraordinary educational experience. The university excels in the sciences and humanities, business and economics, educational studies, film and media arts, performing arts, and law. Student enrollment in graduate and undergraduate programs is approaching 8,000 and Chapman University alumni are found throughout the world. Visit us at www.chapman.edu.

Follow us on Facebook at: Chapman University Facebook
On Twitter and Instagram at: @ChapmanU

For more information, please click here

Contacts:
Sheri Ledbetter

714-289-3143

Copyright © Chapman University

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

To see the full article, click here:

More about Chapman's Insititute for Quantum Studies can be found here:

Related News Press

News and information

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

New Cypher VRS1250 Video-Rate Atomic Force Microscope Enables True Video-Rate Imaging at up to 45 Frames per Second April 30th, 2021

New brain-like computing device simulates human learning: Researchers conditioned device to learn by association, like Pavlov's dog April 30th, 2021

Imaging

World's first fiber-optic ultrasonic imaging probe for future nanoscale disease diagnostics April 30th, 2021

New Cypher VRS1250 Video-Rate Atomic Force Microscope Enables True Video-Rate Imaging at up to 45 Frames per Second April 30th, 2021

Researchers realize high-efficiency frequency conversion on integrated photonic chip April 23rd, 2021

An easy-to-use platform is a gateway to AI in microscopy April 23rd, 2021

Magnetism

Researchers analyzed circulating currents inside gold nanoparticles: A new method facilitates accurate analysis of magnetic field effects inside complex nanostructures April 30th, 2021

Discovery could help lengthen lifespan of electronic devices: The research could lead to electronics being designed with better endurance April 9th, 2021

Search for strange Skyrmion phenomenon fails but finds stranger magnetic beaded necklace: Physicists on the hunt for a rarely seen magnetic spin texture have discovered another object that bears its hallmarks, hidden in the structure of ultra-thin magnetic films, that they have c April 2nd, 2021

DNA--Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Quantum Physics

Researchers realize high-efficiency frequency conversion on integrated photonic chip April 23rd, 2021

Quantum steering for more precise measurements April 23rd, 2021

Superconductivity

FSU engineers improve performance of high-temperature superconductor wires April 16th, 2021

Blog sites

First measurement of electron energy distributions, could enable sustainable energy technologies June 5th, 2020

Novel Electrode Structure Provides New Promise for Lithium-Sulfur Batteries December 3rd, 2016

Peter Diamandis Thinks Nanotech Will Interface With Human Minds September 1st, 2016

Graphene-Enabled Paper Makes for Flexible Display August 1st, 2016

Govt.-Legislation/Regulation/Funding/Policy

Simple robots, smart algorithms April 30th, 2021

A silver lining for extreme electronics April 30th, 2021

Less innocent than it looks: Hydrogen in hybrid perovskites: Researchers identify the defect that limits solar-cell performance April 30th, 2021

New brain-like computing device simulates human learning: Researchers conditioned device to learn by association, like Pavlov's dog April 30th, 2021

Possible Futures

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

New Cypher VRS1250 Video-Rate Atomic Force Microscope Enables True Video-Rate Imaging at up to 45 Frames per Second April 30th, 2021

Discoveries

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Less innocent than it looks: Hydrogen in hybrid perovskites: Researchers identify the defect that limits solar-cell performance April 30th, 2021

Announcements

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

New Cypher VRS1250 Video-Rate Atomic Force Microscope Enables True Video-Rate Imaging at up to 45 Frames per Second April 30th, 2021

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

With a zap of light, system switches objects' colors and patterns: "Programmable matter" technique could enable product designers to churn out prototypes with ease May 6th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal May 4th, 2021

Researchers analyzed circulating currents inside gold nanoparticles: A new method facilitates accurate analysis of magnetic field effects inside complex nanostructures April 30th, 2021

Tools

World's first fiber-optic ultrasonic imaging probe for future nanoscale disease diagnostics April 30th, 2021

New Cypher VRS1250 Video-Rate Atomic Force Microscope Enables True Video-Rate Imaging at up to 45 Frames per Second April 30th, 2021

Researchers realize high-efficiency frequency conversion on integrated photonic chip April 23rd, 2021

An easy-to-use platform is a gateway to AI in microscopy April 23rd, 2021

Military

Simple robots, smart algorithms April 30th, 2021

With new optical device, engineers can fine tune the color of light April 23rd, 2021

Silver ions hurry up, then wait as they disperse: Rice chemists show ions’ staged release from gold-silver nanoparticles could be useful property April 23rd, 2021

Synthetic gelatin-like material mimics lobster underbelly’s stretch and strength: The membrane’s structure could provide a blueprint for robust artificial tissues April 23rd, 2021

Automotive/Transportation

A silver lining for extreme electronics April 30th, 2021

Chile coating and composite industry makes leap forward leveraging graphene nanotube solutions April 9th, 2021

Izon Science launches the Exoid to transform nanoparticle measurement: The semi-automated Exoid device uses new-generation Tunable Resistive Pulse Sensing (TRPS) technology, enabling the measurement of complex nano-particle size, concentration, and charge – with unparalleled prec March 23rd, 2021

A new industry standard for batteries: ultra-clean facility for graphene nanotube dispersions March 19th, 2021

Photonics/Optics/Lasers

With new optical device, engineers can fine tune the color of light April 23rd, 2021

Silver ions hurry up, then wait as they disperse: Rice chemists show ions’ staged release from gold-silver nanoparticles could be useful property April 23rd, 2021

New tech builds ultralow-loss integrated photonic circuits April 16th, 2021

Microscope that detects individual viruses could power rapid diagnostics March 19th, 2021

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




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project