17 research outputs found
Strong field dynamics with ultrashort electron wave packet replicas
We investigate theoretically electron dynamics under a VUV attosecond pulse
train which has a controlled phase delay with respect to an additional strong
infrared laser field. Using the strong field approximation and the fact that
the attosecond pulse is short compared to the excited electron dynamics, we
arrive at a minimal analytical model for the kinetic energy distribution of the
electron as well as the photon absorption probability as a function of the
phase delay between the fields. We analyze the dynamics in terms of electron
wave packet replicas created by the attosecond pulses. The absorption
probability shows strong modulations as a function of the phase delay for VUV
photons of energy comparable to the binding energy of the electron, while for
higher photon energies the absorption probability does not depend on the delay,
in line with the experimental observations for helium and argon, respectively.Comment: 14 pages, 8 figure
Research on Teaching and Learning Mathematics at the Tertiary Level:State-of-the-art and Looking Ahead
This topical survey focuses on research in tertiary mathematics education, a field that has experienced considerable growth over the last 10 years. Drawing on the most recent journal publication as well as the latest advances from recent high quality conference proceedings, our review culls out the following five emergent areas of interest: mathematics teaching at the tertiary level; the role of mathematics in other disciplines; textbooks, assessment and students’ studying practices; transition to the tertiary level; and theoretical-methodological advances. We conclude the survey with a discussion of some potential ways forward for future research in this new and rapidly developing domain of inquiry