LPHYS'17.    Plenary Speakers:

  1. Advanced Laser Driven Radiation and Particle Sources: How to, What for and a Virtual Tour Through the ELI-ALPS Project

    Abstract:

    In this presentation I will give an overview of the basic concepts and characteristics of advanced laser driven radiation and particle sources as well as selected applications of them in tracking and visualizing structural dynamics with the highest spatiotemporal resolution. High intensity, short pulse laser-matter interactions lead to the generation of radiation and particle pulses with advance specifications, the use of which challenges dynamics in the attosecond time regime and structures in the sub-nm spatial regime. Generation processes include high order harmonic generation (HOHG) and laser weak field emission/acceleration (LWFA). Applications of such sources encompass the study of

    1. I) ultrafast dynamics in atoms and molecules, from electron and reaction dynamics in small systems to charge migration in biological molecules;
    2. II) magnon, electron-electron scattering and plasmon dynamics in surface and condensed matter;
    3. III) biomedical applications, such as radiobiology and biological imaging;
    4. IV) material science.

    Currently Europe is implementing the Extreme Light Infrastructure (ELI), the largest laser user research infrastructure (RI), distributed in the Czech Republic [ELI-Beam-Lines (ELI-BL)], Hungary [ELI-Attosecond Light Pulse Source (ELI-ALPS)] and Romania [ELI-Nuclear Physics (ELI-NP)]. ELI will provide to users access to unique lasers, laser driven sources and workstations, offering unprecedented research opportunities in the above mentioned areas. I will conclude my talk presenting the ELI-ALPS pillar that will host all the above mentioned sources.

  2. What do the Data Tell Us? A Bayesian Answer

    Abstract:

    In typical state estimation scenarios, including the characterization of a quantum channel for key distribution, we must infer properties of the quantum state from the data of a single run. Standard frequentist concepts, such as confidence intervals, are not useful here. Instead one has to rely on the credible intervals obtained in a Bayesian approach. I'll discuss various aspects of this matter.

  3. Some Delicacies of Laser Driven Nonlinear Plasmonics in Gold Films

    Abstract:

    A set of unique results of nonlinear surface plasmon (SPO) phenomena are presented. The SPO-s have been excited by femtosecond Ti:Sa lasers. Response signals to these excitations of a near field scanning tunneling microscope, spectra of SPO assisted electron emission by the time-of-flight technique and properties of SPO assisted photon emission have been studied.

    A broad spectrum of room temperature experimental observations is described from nonclassical SPO properties, electron pairing and magnetic anomalies in a wide laser intensity range around 80 GW/cm2, dynamical screening of electrons by the photon/SPO field to some electron interference phenomena.

    The theoretical interpretation of our findings is also discussed.

    References:
    1. [1] N Kroó, P Rácz and S Varró, Europhys. Lett. 105, 67003 (2014)
    2. [2] N Kroó, P Rácz and S Varró, Europhys. Lett. 110, 67008 (2015)
    3. [3] N Kroó, P Rácz and I Tüttő, Europhys. Lett. 115, 27010 (2016)
  4. Photon Echo Quantum Memory for Optical and Microwave Spectral Ranges

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      Sergey A Moiseev


      Kazan Quantum Center, Kazan National Research Technical University, Kazan, Russia
    Abstract:

    The photon echo schemes elaborated for quantum storage in optical and microwave spectral range are considered. Here, we also investigate possible approaches for broadband quantum storage in free space and QED cavity schemes. Special attention is paid to the study of the negative effects caused by spectral dispersion and to the additional methods which are useful for suppression of these effects. We discuss new AFC schemes providing an efficient quantum storage in optical and microwave wavelengths. Finally, we present our recent experiments and its further prospects for the realization of highly efficient quantum storage.

  5. Statistical Signature of Vortex Filaments: Dog or Tail?

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      Sergey K Nemirovskii


      Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
    Abstract:

    The title of talk coincides with the title of a paragraph in famous book on classical turbulence by U. Frisch [1]. In this paragraph the author discussed the role of statistical dynamics of vortex filaments in theory of turbulence and put the question: are the vortex filaments the dog or the tail? In other words, whether the main properties of turbulence (cascade, scaling laws) are the sequence of the vortex line dynamics or the latter have only marginal signature.

    Quantum fluids, where the vortex filaments are the real objects, give an excellent opportunity to explore the role of discrete vortices in turbulent phenomena. Part of talk is devoted to comparative analysis of study of quantum turbulence on the basis of Gross-Pitaevskii equation for vortices in BEC and with the use of the vortex filament method for vortices in the superfluid helium. The conclusion is that the best way is a combination of these two approaches.

    Another part talk is to discuss what elements of vortex dynamics would lead to basic features of theory of classical turbulence. We discuss how the nonlinear dynamics of vortex filaments can result in an exchange of energy between different scales, the formation of the Kolmogorov type energy spectra and the decay of turbulence.

    Finally, we discuss whether the outlined issues are relevant to classical turbulence, or that are other phenomena.

    References:
    1. [1] U Frisch, Turbulence (Cambridge University Press, Cambridge, 1995)
  6. The Quantum Theory of the Laser: Half a Century Later

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      Marlan O Scully


      Texas A&M University, Princeton, NJ, USA
      Baylor University, Waco, TX, USA
    Abstract:

    The search for a quantum theory of the laser was described by Glauber as a search for the laser radiation density matrix. The first such theory was given at the 1965 Physics of Quantum Electronics Conference [1]. Since then various applications and extension have been realized from the micromaser to the atom laser [2] (a.k.a. Bose condensate). These developments will be reviewed.

    More recently the time dependence of the off-diagonal elements of the laser density matrix have been measured [3] and various aspects of laser radiation such as the entropy [4] of laser light are subjects of research interest. These and other topics of current interest will be presented.

    References:
    1. [1] M O Scully, W Lamb Jr and M Stephen, Proc. of the International Conference on the Physics of Quantum Electronics, Puerto Rico, 1965.
    2. [2] M O Scully, Phys. Rev. Lett. 82, 3927 (1999)
    3. [3] T Peng, Y Shih and M Scully, T.B.P.
    4. [4] M Scully, T.B.P.
  7. Sculptured Ultrashort Intense Laser and THz Beams

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      Stelios Tzortzakis


      Science Program, Texas A&M University at Qatar, Doha, Qatar
      Institute of Electronic Structure and Laser, FORTH, Heraklion, Crete, Greece
      Department of Materials Science and Technology, University of Crete, Heraklion, Crete, Greece

    Abstract:

    The nonlinear propagation of ultrashort laser pulses in the form of solitons, filaments and light bullets is an exciting research field [1]. Beyond the basic studies on the complex spatio-temporal phenomena involved, the field is driven significantly by its numerous applications, like for example in materials engineering, remote spectroscopy, lightning control.

    Here we discuss our recent results on the tailored propagation of linear and nonlinear waves, including exotic wave packets, like ring-Airy beams and the newly introduced family of Janus waves [2], that present exciting properties both in the linear and the nonlinear regime.

    On the applications side, we demonstrate the use of appropriately sculptured beams for delivering high laser and THz intensities at remote locations [3-4]. Also, applications for advanced material micro/nano-structuring [5], with a special emphasis on the laser engineering of bulk silicon, enabled through extreme localization [6], which opens the way to laser-written integrated silicon photonics.

    References:
    1. [1] P Panagiotopoulos, D G Papazoglou, A Couairon and S Tzortzakis, Nat. Commun. 4, 2622 (2013)
    2. [2] D G Papazoglou, V Yu Fedorov and S Tzortzakis, Opt. Lett. 41, 4656 (2016)
    3. [3] P Panagiotopoulos, A Couairon, M Kolesik, D G Papazoglou, J V Moloney and S Tzortzakis, Phys. Rev. A 93, 033808 (2016)
    4. [4] K Liu, A D Koulouklidis, D G Papazoglou, S Tzortzakis and X-C Zhang, Optica 3, 605 (2016)
    5. [5] M Manousidaki, D G Papazoglou, M Farsari and S Tzortzakis, Optica 3, 525 (2016)
    6. [6] V Yu Fedorov, M Chanal, D Grojo and S Tzortzakis, Phys. Rev. Lett. 117, 043902 (2016)