Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Scientists create antilaser for ultracold atoms condensate

An international team of scientists developed the world's first antilaser for nonlinear Bose-Einstein condensate of ultracold atoms. For the first time, scientists demonstrated that it is possible to absorb the selected signal completely, even though the nonlinear system makes it difficult to predict the waves behaviour. The results can be used to manipulate superfluid flows, create atomic lasers, and also study nonlinear optical systems.

CREDIT
ITMO University
An international team of scientists developed the world's first antilaser for nonlinear Bose-Einstein condensate of ultracold atoms. For the first time, scientists demonstrated that it is possible to absorb the selected signal completely, even though the nonlinear system makes it difficult to predict the waves behaviour. The results can be used to manipulate superfluid flows, create atomic lasers, and also study nonlinear optical systems. CREDIT ITMO University

Abstract:
An international team of scientists developed the world's first antilaser for nonlinear Bose-Einstein condensate of ultracold atoms. For the first time, scientists demonstrated that it is possible to absorb the selected signal completely, even though the nonlinear system makes it difficult to predict the waves behaviour. The results can be used to manipulate superfluid flows, create atomic lasers, and also study nonlinear optical systems. The study was published in Science Advances.

Scientists create antilaser for ultracold atoms condensate

St. Petersburg, Russia | Posted on August 16th, 2018

Successful information transfer requires an ability to extinguish selected electromagnetic signal completely, without any reflection. This might happen only when the parameters of the electromagnetic waves and the system around them are coherent with each other. Devices that provide coherent perfect absorption of a wave with given parameters are called antilasers. They have been used for several years in optics, for example, to create high-precision filters or sensors. The work of standard antilasers is based on the destructive interference of waves incident on the absorber. If the parameters of the incident waves are matched in a certain way, then their interaction leads to the perfect absorption with zero reflection.

However, until now it was not clear whether such an absorption is possible in nonlinear systems, such as optical fiber transmitting high-intensity signal in strong external electromagnetic field. The problem is that it is much more difficult to describe the interaction of the incident waves propagating in the nonlinear medium. At the same time, nonlinear systems are interesting due to their capability of controlling wave frequency and shape without energy loss. This can be useful for signal distinction in optical computers. However, the problem is that nonlinear systems often turn out to be unstable and predicting their behavior can be difficult.

In studying this problem, scientists from Russia, Germany and Portugal became the first to construct an antilaser for waves propagating in a nonlinear medium. In their experiments, scientists used a Bose-Einstein condensate of ultracold atoms. Bose-Einstein condensate is a peculiar state of matter which can be observed when the atomic gas is cooled to extremely low temperatures close to the absolute zero. Under these conditions, a gas containing about 50,000 atoms condenses. This means that all atoms form a coherent cloud which supports propagation of matter waves. Strong repulsive interactions between the condensed atoms induce nonlinear properties in the system. For example, the interaction of waves ceases to obey the laws of linear interference.

To catch the condensate, scientists use a periodic optical trap formed by the intersection of two laser beams. A focused electron beam applied to the central cell of the lattice makes the atoms leak out from this cell. Atoms from neighboring cells go to the central cell, striving to make up for the leak. As a result, two superfluid matter flows directed toward the center are formed in the condensate. Once the flows meet in the central cell, they are absorbed perfectly, without reflection.

"The laws that describe the propagation of waves in various media are universal. Therefore, our idea can be adapted to implement an antilaser in other nonlinear systems. For example, in nonlinear optical waveguides or in condensates of quasiparticles, such as polaritons and excitons. This concept can also be used when working with nonlinear acoustic waves. For example, you can build a device that will absorb sounds of a certain frequency. Although such devices may not be made soon, we have shown that they are possible," notes researcher Dmitry Zezyulin, member of the International Laboratory of Photoprocesses in the Mesoscopic Systems at ITMO University.

Scientists currently plan to shift to nonlinear optical systems, where atoms will be replaced with photons. "Photons, unlike atoms, are difficult to keep in the system for long. However, in this project, my colleagues managed to make a nonlinear atomic system behave as if it consisted of photons. At the same time, they managed to implement an ideal absorption in such conditions. This means that these processes are also possible in nonlinear photonic systems," adds Ivan Iorsh, the head of the International Laboratory of Photoprocesses in the Mesoscopic Systems at ITMO University.

####

For more information, please click here

Contacts:
Dmitry Malkov

7-953-377-5508

Copyright © ITMO 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

Reference:

Related News Press

News and information

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

European Commission Project Creates Pilot Line for Companies to Develop Mid-Infrared Devices: Companies Can Submit Proposals for Possible Matching Funds To Help Develop Prototypes November 13th, 2018

Arrowhead Pharmaceuticals Presents Late-Breaking Clinical Data on ARO-AAT at Liver Meeting® 2018 November 9th, 2018

Physics

Physicists name and codify new field in nanotechnology: ‘electron quantum metamaterials:’ UC Riverside’s Nathaniel Gabor and colleague formulate a vision for the field in a perspective article November 5th, 2018

2-D magnetism: Atom-thick platforms for energy, information and computing research: Scientists say the tiny 'spins' of electrons show potential to one day support next-generation innovations in many fields October 31st, 2018

Searching for errors in the quantum world September 21st, 2018

How a tetrahedral substance can be more symmetrical than a spherical atom: A new type of symmetry September 14th, 2018

Possible Futures

Arrowhead Pharmaceuticals Presents Late-Breaking Preliminary Clinical Data on ARO-HBV at Liver Meeting® 2018 November 9th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

WSU researchers develop new technique to understand biology at the nanoscale November 7th, 2018

The National Graphene Association Is Excited To Announce A New Affiliate Partnership With Graphene Engineering Innovation Centre (GEIC) November 7th, 2018

Chip Technology

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

IEDM - CEA-Leti Will Present 11 Papers and Host Workshop on Disruptive Technologies for Data Management November 7th, 2018

Optical computing/Photonic computing

AIM Photonics Members Meeting Provides Key Updates on the Initiative’s Progress: Day-Long Engagement in Syracuse, NY, Sees Strong Attendance and Interest from Industry, Government, and Academic Partners November 2nd, 2018

Rice U. scientists form flat tellurium: Two-dimensional element shows promise for solar cells and other optoelectronics October 26th, 2018

Leti and Taiwanese National Applied Research Laboratories Announce Collaboration for Microelectronics Innovation: Collaboration Will Facilitate Scientific and Technological Exchanges in Microelectronics, Sharing Platforms and Encouraging PhD Student Exchanges October 23rd, 2018

Graphene shows unique potential to exceed bandwidth demands of future telecommunications October 12th, 2018

Discoveries

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

WSU researchers develop new technique to understand biology at the nanoscale November 7th, 2018

A record-long polymer DNA negative November 6th, 2018

Nanotech Artisans Sculpt with DNA November 5th, 2018

Announcements

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

European Commission Project Creates Pilot Line for Companies to Develop Mid-Infrared Devices: Companies Can Submit Proposals for Possible Matching Funds To Help Develop Prototypes November 13th, 2018

Arrowhead Pharmaceuticals Presents Late-Breaking Clinical Data on ARO-AAT at Liver Meeting® 2018 November 9th, 2018

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

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

WSU researchers develop new technique to understand biology at the nanoscale November 7th, 2018

IEDM - CEA-Leti Will Present 11 Papers and Host Workshop on Disruptive Technologies for Data Management November 7th, 2018

A record-long polymer DNA negative November 6th, 2018

Photonics/Optics/Lasers

European Commission Project Creates Pilot Line for Companies to Develop Mid-Infrared Devices: Companies Can Submit Proposals for Possible Matching Funds To Help Develop Prototypes November 13th, 2018

Physicists name and codify new field in nanotechnology: ‘electron quantum metamaterials:’ UC Riverside’s Nathaniel Gabor and colleague formulate a vision for the field in a perspective article November 5th, 2018

AIM Photonics Members Meeting Provides Key Updates on the Initiative’s Progress: Day-Long Engagement in Syracuse, NY, Sees Strong Attendance and Interest from Industry, Government, and Academic Partners November 2nd, 2018

Tiny light detectors work like gecko ears October 30th, 2018

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