Viktoras Pyragas
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Institute of Theoretical Physics and Astronomy of Vilnius University,
A. Goštauto 12, 01108 Vilnius, Lithuania

Short information

Name: Viktoras
Surname: Pyragas
Date of birth and place: 1975 december 20, Vilnius, Lithuania
Email: viktpy@pfi.lt

I am working in the State Scientific Research Institute, Center for Physical Sciences and Technology, Semiconductor Physics Institute.

I am also working in the Quantum Optics group headed by Habil. Dr. Gediminas Juzeliūnas in the Institute of Theoretical Physics and Astronomy of Vilnius University.

Education:

1996 - 2001 Bachelor studies in the Faculty of Physics of Vilnius University.
2001 - 2003 Master studies in the Faculty of Physics of Vilnius University. Study program: Theoretical physics and astrophysics.
2003 - 2007 PhD studies in the Semiconductors physics institute.

Scientific expierence:

2003 - 2007 PhD studies in the Semiconductors physics institute. Junior research fellow.
2007 - 2008 Junior research fellow in the Semiconductors physics institute.
2008 - Research fellow in the Semiconductors physics institute.

Fields of interest:

I am working in the field of chaos control (together with prof. Habil. Dr. Kestutis Pyragas), i.e. I am solving the problems of using the delayed feedback control (DFC) for stabilization of unstable periodic orbits (UPOs) embedded in chaotic attractors.

I am also working on the nonlinear dynamics taking place during the transition between atomic and molecular state of cold atoms.

I am co-author of 10 ISI publications and 2 review articles.

Publications:

(a) Review articles

  1. K. Pyragas, V. Pyragas, Delayed feedback control techniques, Chapter 5 in: Recent Progress in Controlling Chaos: Series on Stability, Vibration and Control of Systems,
    Ser. B - Vol. 16 , A. Guran, Ed. (World Scientific Publ.: New Jersey 2010), p. 103-146.
  2. K. Pyragas, T. Pyragiene, V. Pyragas, An analytical treatment of the delayed feedback control algorithm, Chapter 3 in: Handbook of Chaos Control, 2nd ed., E. Schöll, H.G. Schuster, Eds.
    (Wiley-VCH Verlag, 2008), p. 47-71.

(b) ISI journal articles

  1. V. Pyragas, K. Pyragas, Adaptive modification of the delayed feedback control algorithm with a continuously varying time delay , Phys. Lett. A 375 , 3866-3871 (2011).
  2. V. Pyragas and K. Pyragas, Modification of delayed feedback control using ergodicity of chaotic systems, Lith. J. Phys. vol. 50, No.3, 305-316 (2010).
  3. K. Pyragas, V. Pyragas, Using ergodicity of chaotic systems for improving the global properties of the delayed feedback control method , Phys. Rev. E 80 , 067201-4 (2009).
  4. A. Tamaševicius, G. Mykolaitis, V. Pyragas, K. Pyragas, Delayed feedback control of periodic orbits without torsion in nonautonomous chaotic systems: Theory and experiment, Phys. Rev. E 76, 026203-6 (2007).
  5. V. Pyragas, K. Pyragas, Delayed feedback control of the Lorenz system: An analytical treatment at a subcritical Hopf bifurcation, Phys. Rev. E 73, 036215-10 (2006).
  6. G. Mykolaitis, A. Tamaševicius, S. Bumeliene, A. Namajunas, K. Pyragas, V. Pyragas, Application of ultrafast Schottky diodes to high megahertz chaotic oscillators, Acta Phys. Pol. A 107, No. 2, 365-368 (2005).
  7. A. Tamaševicius, A. Mykolaitis, V. Pyragas, K. Pyragas, Simple chaotic oscillator for educational purposes, Eur. J. Phys. 26, (2), pp. 61-63 (2005).
  8. K. Pyragas, V. Pyragas, and H. Benner, Delayed feedback control of dynamical systems at a subcritical Hopf bifurcation, Phys. Rev. E 70, 056222-4 (2004).
  9. K. Pyragas, V. Pyragas, I.Z. Kiss, and J.L. Hudson, Adaptive control of unknown unstable steady states of dynamical systems, Phys. Rev. E 70, 026215-12 (2004).
  10. K. Pyragas, V. Pyragas, I.Z. Kiss, J.L. Hudson, Stabilizing and tracking unknown steady states of dynamical systems, Phys. Rev. Lett. 89, 244103-4 (2002).

(c) Other refereed journal articles

  1. V. Pyragas, K. Pyragas, Analytical treatment of the delayed feedback controlled Lorenz system close to a subcritical Hopf bifurcation , Lith. J. Phys. vol. 48 No.1, 5-16 (2008).
  2. V. Pyragas, K. Pyragas, An analytical treatment of the delayed feedback control algorithm at a subcritical Hopf bifurcation, Lith. J. Phys., vol. 45, No. 6, 457-461 (2005).
  3. V. Pyragas, K. Pyragas, Adaptive stabilization of unstable steady states of nonlinear dynamical systems, Lith. J. Phys. vol. 44, No. 1, 5-16 (2004).

(d) Conference proceedings

  1. V. Pyragas, K. Pyragas, Adaptive delayed feedback control algorithm with a state dependent delay,
    Proc. ENOC-2011. 7th European Nonlinear Dynamics Conf., Rome, Italy, July 24-29, 2011,
    D. Bernardini, G. Rega, and F. Romeo, Eds., p. 131, ISBN 978-88-906234-2-4 (2011).
  2. K. Pyragas, V. Pyragas, T. Pyragiene, Control and synchronization of dynamical systems via a time-delay feedback,
    ISAST T. Comput. Intell. Syst. 1(2), 17-22 (2009).
  3. K. Pyragas, V. Pyragas, T. Pyragiene, Analytical treatment of delayed feedback control method at Hopf bifurcations (invited),
    Proc. ENOC-2005. Fifth EUROMECH Nonlinear Dynamics Conf., Eindhoven, The Netherlands, Aug. 7-12, 2005,
    D.H. van Campen, M.D. Lazurko, W.P.J.M. van den Oever, Eds., p. 1157-1165, ISBN 90-386-2667-3 (2005).