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Maximizing the Validity of the Gaussian Approximation for the biphoton State from Parametric Downconversion
Baghdasar Baghdasaryan, Fabian Steinlechner, Stephan Fritzsche
Spontaneous parametric down-conversion (SPDC) is widely used in quantum applications based on photonic entanglement. The efficiency of photon pair generation is often characterized…
Spectral Properties of Transverse Laguerre-Gauss Modes in Parametric Down-Conversion
Carlos Sevilla-Gutiérrez, Varun Raj Kaipalath, Baghdasar Baghdasaryan +3
The first color photos of the parametric down-conversion (PDC) emission cone illustrate the correlation of longitudinal- and transverse momentum in the process, i.e., wavelength-de…
Generalized description of the spatio-temporal biphoton State in spontaneous parametric down-conversion
Baghdasar Baghdasaryan, Carlos Sevilla-Gutiérrez, Fabian Steinlechner +1
Spontaneous parametric down-conversion (SPDC) is a widely used source for photonic entanglement. Years of focused research have led to a solid understanding of the process, but a c…
Multiple Photodetachment of Oxygen Anions via K-Shell Excitation and Ionization: Direct Double-Detachment Processes and Subsequent Deexcitation Cascades
S. Schippers, A. Hamann, A. Perry-Sassmannshausen +6
Experimental cross sections for m-fold photodetachment (m=2-5) of oxygen anions via K-shell excitation and ionization were measured in the photon-energy range of 525-1500 eV using…
QED approach to valence-hole excitation in closed shell systems
R. N. Soguel, A. V. Volotka, S. Fritzsche
An ab initio QED approach to treat a valence-hole excitation in closed shell systems is developed in the framework of the two-time-Green function method. The derivation considers a…
Polarization effects in the total rate of biharmonic ionization of atoms
J. Hofbrucker, S. Ramakrishna, A. V. Volotka +1
The total ionization rate of biharmonic () ionization is studied within the independent particle approximation and the third order perturbation theory. Particular attention…
g Factor of Lithiumlike Silicon and Calcium: Resolving the Disagreement between Theory and Experiment
V. P. Kosheleva, A. V. Volotka, D. A. Glazov +2
The bound-electron g factor is a stringent tool for tests of the Standard Model and the search for new physics. The comparison between an experiment on the g factor of lithiumlike…