Dear colleagues,
this Wednesday we have the last regular colloquium of the summer semester.
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* Please note the different location:
* coffee and colloquium in room 36 M 24
* (take elevator to the M-floor from the lecture hall 16 G 05)
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Attosekundenzeitaufgelöste Photoemission und spinaufgelöste
Photoelektronenspektroskopie, 30. Juni 2004
Prof. U. Heinzmann
Universität Bielefeld
"Recently performed experiments of time-resolved photoionization and
Augerelectron emission with 100 attosecond time resolution are presented
here. Special nanometer multilayer systems are used as XUV optical key
components for these studies. Furthermore new results of photoelectron
und Augerelectron spin polarization in atomic photoionization and
surface photoemission and their use to determine electronic phase shifts
are presented. The talk finally discusses the problem how time and phase
of light incidence and of electron emission may correlate to each other."
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch
Dear colleagues,
this Wednesday we have a colloquium about
Generation of a Single-Cycle Optical Pulse, 23. Juni 2004
Stephen Harris
Stanford University
"By using collinear Raman generation at maximum coherence, followed by
liquid crystal spectral phase adjustment, we have recently attained a
milestone result: the generation of a train of single-cycle optical
pulses with a pulse width of 1.5 fs, a pulse spacing of 11 fs, and a
peak power of about 1 MW. The talk describes the generation of these
pulses, the use of a single cycle pulse for coherently controlled four
wave mixing to the ultraviolet, and prospects for experiments with
optical waveforms which have prescribed temporal shape."
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch
Dear colleagues,
this Wednesday we have a colloquium about
Climatic extremes and their impacts , 16. Juni 2004
Prof. Martin Beniston
Université de Fribourg
"While changes in the long-term mean state of climate will have many
important consequences on numerous environmental, social, and economic
sectors, the most significant impacts of climatic change are likely to
arise from shifts in the intensity and frequency of extreme weather
events. Indeed, insurance costs resulting from extreme weather events
have been steadily increasing over the last two decades, in response to
both population pressures in regions that are at risk, but also because
of the frequency and severity of certain forms of extremes are changing.
Regions now safe from catastrophic wind storms, heat waves, and floods
are increasingly becoming more vulnerable to these events. The
associated damage costs would consequently be extremely high.
It seems appropriate, therefore, considering the environmental, human
and economic costs exerted by extreme climatic events, to address the
problem of whether there may be significant shifts in extremes of wind,
precipitation or temperature in a changing global climate. In order to
achieve these goals, the level of current scientific understanding and
the availability of computational resources now enable numerical
modeling techniques to be applied to this problem area.
Examples will be given of how extreme events may be viewed, i.e., either
in terms of their rarity, their intensity, or the pressures they exert
on the natural and socio-economic environments. The salient features of
extreme events will be highlighted by examining the equation systems
that govern fluid flows and atmospheric thermodynamics and how they
relate to the "real world". Some attention will also be given to the
impacts that these events are capable of generating, in order to assess
what areas of science should be focused upon in the future in order to
respond to the needs of the "end-user community" (i.e., policy makers
and the general public) with a view of reducing the severity of the
consequences of extreme climatic events."
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch
Dear colleagues,
this Wednesday we have a colloquium about
Gravitational wave astronomy
Prof. B.F. Schutz
Albert-Einstein-Institut
Golm bei Potsda
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch
Dear colleagues,
this Wednesday we have a colloquium about
Quantum computer - dream and realization, 2. Juni 2004
Prof. Rainer Blatt
Universität Innsbruck
Computational operations always rely on real physical processes, which
are data input, data representation in a memory, data manipulation using
algorithms and finally, the data output. With conventional computers all
the processes are classical processes and can be described accordingly.
Theoretically, it is known for several years now that certain
computations could be processed much more efficiently using quantum
mechanical operations. Therefore, there it would be desirable to built a
quantum computer. This requires the implementation of quantum bits
(qubits), quantum registers and quantum gates and the development of
quantum algorithms. In this talk, several techniques for the realization
of a quantum computer will be presented and compared. Special emphasis
will be given to the ion storage and laser cooling techniques which are
currently investigated for an application with quantum computers. First
experimental results with trapped Ca+ ions in linear traps will be
presented and discussed.
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch