Zobrazeno 1 - 10
of 495
pro vyhledávání: '"Jan Marcus"'
Publikováno v:
Communications Physics, Vol 7, Iss 1, Pp 1-8 (2024)
Abstract The development in attosecond physics allows for unprecedented control of atoms and molecules in the time domain. Here, ultrashort pulses are used to prepare atomic ions in specific magnetic states, which may be important for controlling cha
Externí odkaz:
https://doaj.org/article/c7896460deb6402990ff529ccdbcb346
Medical student´s motivational changes during the COVID-19 university lockdown: a mixed-method study
Autor:
Parisa Moll-Khosrawi, Josephine Küllmei, Viorel Chindris, Alexander Ganzhorn, Jan Marcus Haus, Christian Zöllner, Leonie Schulte-Uentrop
Publikováno v:
BMC Medical Education, Vol 24, Iss 1, Pp 1-13 (2024)
Abstract Background During the crucial stage of the COVID-19 pandemic, face-to-face undergraduate medical education was disrupted and replaced with online teaching activities. Based on its emphasized impact on several outcomes, a deeper insight into
Externí odkaz:
https://doaj.org/article/416bd4a3ac57485ca136fcfdbe07d92d
Autor:
Jasper Peschel, David Busto, Marius Plach, Mattias Bertolino, Maria Hoflund, Sylvain Maclot, Jimmy Vinbladh, Hampus Wikmark, Felipe Zapata, Eva Lindroth, Mathieu Gisselbrecht, Jan Marcus Dahlström, Anne L’Huillier, Per Eng-Johnsson
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-7 (2022)
Understanding of photoionization dynamics, one of the fastest processes in nature, requires the characterization of all underlying ionization channels. Here the authors use an interferometry technique based on attosecond pulses to measure the phase a
Externí odkaz:
https://doaj.org/article/5e34c6ad15aa4c858e1e3cd4ab10b0ff
Autor:
Edvin Olofsson, Jan Marcus Dahlström
Publikováno v:
Physical Review Research, Vol 5, Iss 4, p 043017 (2023)
Nonperturbative resonant multiphoton ionization (1+1) is studied using the resolvent operator technique. Scaling parameters for effective two-level Hamiltonians are computed for hydrogen and helium atoms to provide a quantitative description of Rabi
Externí odkaz:
https://doaj.org/article/6943c5ae978540538002cfe70c0de7c8
Autor:
Shiyang Zhong, Jimmy Vinbladh, David Busto, Richard J. Squibb, Marcus Isinger, Lana Neoričić, Hugo Laurell, Robin Weissenbilder, Cord L. Arnold, Raimund Feifel, Jan Marcus Dahlström, Göran Wendin, Mathieu Gisselbrecht, Eva Lindroth, Anne L’Huillier
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-6 (2020)
Here the authors report experiment and theory study of the photoionization of xenon inner shell 4d electron using attosecond pulses. They have identified two ionization paths - one corresponding to broad giant dipole resonance with short decay time a
Externí odkaz:
https://doaj.org/article/f8bcd367c5d64df48e2bda3992650c09
Publikováno v:
Atoms, Vol 10, Iss 3, p 80 (2022)
The theory of one-photon ionization and two-photon above-threshold ionization is formulated for applications to heavy atoms in attosecond science by using Dirac–Fock formalism. A direct comparison of Wigner–Smith–Eisenbud delays for photoioniza
Externí odkaz:
https://doaj.org/article/311c6a29e81b4b59bb5ece594a5c25ac
Autor:
Stenquist, Axel, Dahlström, Jan Marcus
The Grobe--Eberly doublet phenomenon occurs in photoelectron distributions when the remaining ion is dressed by a field. As was recently shown, the doublet can be interpreted as a signature of quantum entanglement between photoelectrons and strongly
Externí odkaz:
http://arxiv.org/abs/2405.03339
Autor:
Andrew Goodman-Bacon, Jan Marcus
Publikováno v:
Survey Research Methods, Vol 14, Iss 2 (2020)
Policymakers have implemented a wide range of non-pharmaceutical interventions to fight the spread of COVID-19. Variation in policies across jurisdictions and over time strongly suggests a difference-in-differences (DD) research design to estimate ca
Externí odkaz:
https://doaj.org/article/5d4242b06f6541f4bbba977b2e76a3a7
Autor:
Stenquist, Axel, Zapata, Felipe, Olofsson, Edvin, Liao, Yijie, Sveborn, Elna, Bruhnke, Jakob Nicolai, Verdozzi, Claudio, Dahlström, Jan Marcus
We show that resonant absorption of smooth laser fields can yield Mollow-like triplet patterns. General conditions for such triplets are derived and illustrated with a super-Gaussian pulse sequence. Gaussian pulses can not exhibit triplets, super-Gau
Externí odkaz:
http://arxiv.org/abs/2403.18676
Publikováno v:
APL Photonics, Vol 4, Iss 1, Pp 011101-011101-12 (2019)
In this tutorial, we provide a short review of attosecond pulse characterization techniques and a pedagogical account of a recently proposed method called Pulse Analysis by Delayed Absorption (PANDA) [S. Pabst and J. M. Dahlström, Phys. Rev. A 94, 0
Externí odkaz:
https://doaj.org/article/def488909b2240d8bb38bb0f94f2712c