Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New Type of Chaos Discovered

26.06.2018

Discovery of a new type of chaos by physicists from Chemnitz draws worldwide attention – opportunities in communication, cryptography, and computing

For 40 years, it has been known that lasers utilizing time-delayed feedback of the original signal can cause chaotic intensity fluctuations (top of figure, second image). However, for many potential applications, this type of chaos is too sensitive to perturbations.


Prof. Dr. Günter Radons (middle), Dr. Andreas Otto (left) and David Müller investigate chaos.

Photo: Jacob Müller

The discovery made by the theoretical physicists David Müller, Dr. Andreas Otto, and Prof. Günter Radons from Chemnitz University of Technology could change this situation. They found that a small modification of such experiments – a periodic modulation of the delay – can lead to totally different, novel intensity variations, which are characterized by sequences of plateaus (bottom of figure, second image).

Special features of this type of signal, which is now called laminar chaos, are on one hand the robustness of the location and the form of the plateaus against perturbations, and on the other hand that the heights vary chaotically from plateau to plateau, and thus can serve as a carrier of information.

This high robustness of the information content against perturbations makes this newly discovered form of chaos interesting for modern information technologies such as fast optical realizations of chaos communication, chaos cryptography, or reservoir computing.

The fundamental importance of the research results obtained by the theoretical physicists has made it possible to already publish two articles about their work in the most internationally renowned journal, ‘Physical Review Letters’.

Over the last years, Prof. Günter Radons’s group has achieved such a reputation in the field that it was possible to assemble the worldwide leading experts in delay systems during the upcoming 675. WE-Heraeus Seminar: Delayed Complex Systems 2018, which will take place in the Bad Honnef Physikzentrum from July 2 - 5 (Scientific organization: A. Otto, G. Radons, Chemnitz University of Technology, and Wolfram Just, Queen Mary University of London).

Background knowledge: Chaos & Delay

In physics, the term ‘chaos’ characterizes a type of motion which appears very irregular but at the same time follows definite laws. Almost all systems show this feature, which makes it impossible to make long-term predictions. Well-known examples from everyday life are the weather or the drawing of lottery numbers. Laser light or the size of bacterial colonies can also vary chaotically. ‘Delay’ is a special term which characterizes the time between cause and effect. In many cases, it cannot be ignored and can bring about extremely complicated patterns of movement.

Background knowledge: Wilhelm and Else Heraeus Seminar

The organization of scientific seminars is the oldest and best known funding activity of the Wilhelm and Else Heraeus Foundation. The program has brought together more than 30,000 participants since its establishment in 1975, more than one third from foreign countries. The topics of the seminars cover all fields of modern physics including areas of intersection with other disciplines. WE-Heraeus Seminars encompass the current frontiers of science and are internationally oriented. WE-Heraeus Seminars are applied for by one or several scientists according to the rules of the foundation. After evaluation and recommendation by the scientific advisory committee, the foundation council can grant an approval. The seminars are run by the foundation in close cooperation with the applicant(s) (i.e. the scientific organizers).

The Chemnitz physicists’ articles in ‘Physical Review Letters’:
D. Müller, A. Otto and G. Radons: Laminar Chaos, Phys. Rev. Lett. 120, 084102 (2018).
A. Otto, D. Müller and G. Radons: Universal Dichotomy for Dynamical Systems with Variable Delay, Phys. Rev. Lett. 118, 044104 (2017).

Further information can be obtained from Prof. Günter Radons, Chair of Complex Systems and Nonlinear Dynamics, Institute of Physics, Telefon 0371 531-21870, E-Mail radons@physik.tu-chemnitz.de.

Matthias Fejes | Technische Universität Chemnitz
Further information:
http://www.tu-chemnitz.de/

Further reports about: Heraeus bacterial colonies perturbations potential applications

More articles from Physics and Astronomy:

nachricht The taming of the light screw
22.03.2019 | Max-Planck-Institut für Struktur und Dynamik der Materie

nachricht Magnetic micro-boats
21.03.2019 | Max-Planck-Institut für Polymerforschung

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: The taming of the light screw

DESY and MPSD scientists create high-order harmonics from solids with controlled polarization states, taking advantage of both crystal symmetry and attosecond electronic dynamics. The newly demonstrated technique might find intriguing applications in petahertz electronics and for spectroscopic studies of novel quantum materials.

The nonlinear process of high-order harmonic generation (HHG) in gases is one of the cornerstones of attosecond science (an attosecond is a billionth of a...

Im Focus: Magnetic micro-boats

Nano- and microtechnology are promising candidates not only for medical applications such as drug delivery but also for the creation of little robots or flexible integrated sensors. Scientists from the Max Planck Institute for Polymer Research (MPI-P) have created magnetic microparticles, with a newly developed method, that could pave the way for building micro-motors or guiding drugs in the human body to a target, like a tumor. The preparation of such structures as well as their remote-control can be regulated using magnetic fields and therefore can find application in an array of domains.

The magnetic properties of a material control how this material responds to the presence of a magnetic field. Iron oxide is the main component of rust but also...

Im Focus: Self-healing coating made of corn starch makes small scratches disappear through heat

Due to the special arrangement of its molecules, a new coating made of corn starch is able to repair small scratches by itself through heat: The cross-linking via ring-shaped molecules makes the material mobile, so that it compensates for the scratches and these disappear again.

Superficial micro-scratches on the car body or on other high-gloss surfaces are harmless, but annoying. Especially in the luxury segment such surfaces are...

Im Focus: Stellar cartography

The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.

A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...

Im Focus: Heading towards a tsunami of light

Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.

"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

International Modelica Conference with 330 visitors from 21 countries at OTH Regensburg

11.03.2019 | Event News

Selection Completed: 580 Young Scientists from 88 Countries at the Lindau Nobel Laureate Meeting

01.03.2019 | Event News

LightMAT 2019 – 3rd International Conference on Light Materials – Science and Technology

28.02.2019 | Event News

 
Latest News

Solving the efficiency of Gram-negative bacteria

22.03.2019 | Life Sciences

Bacteria bide their time when antibiotics attack

22.03.2019 | Life Sciences

Open source software helps researchers extract key insights from huge sensor datasets

22.03.2019 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>