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35 papers · 1 filter
Coherent State Description of the Ground State in the Tavis-Cummings Model and its Quantum Phase Transitions
Octavio Castanos, Ramon Lopez-Pena, Eduardo Nahmad-Achar +3
Quantum phase transitions and observables of interest of the ground state in the Tavis-Cummings model are analyzed, for any number of atoms, by using a tensorial product of coheren…
Control, measurement and propagation of entanglement in photon pairs generated through type-II parametric downconversion
Yasser Jeronimo-Moreno, Alfred B. U'Ren
We present a study of the effects of dispersion on the properties of photon pairs generated by type-II, collinear spontaneous parametric downconversion. Specifically, we take into…
Perturbative quantum analysis and classical limit of the electron scattering by a solenoidal magnetic field
Gabriela Murguia, Matias Moreno, Manuel Torres
A well known example in quantum electrodynamics (QED) shows that Coulomb scattering of unpolarized electrons, calculated to lowest order in perturbation theory, yields a results th…
A single structured light beam as an atomic cloud splitter
B. M. Rodriguez-Lara, R. Jauregui
We propose a scheme to split a cloud of cold non-interacting neutral atoms based on their dipole interaction with a single structured light beam which exhibits parabolic cylindrica…
Dynamical constants of structured photons with parabolic-cylindrical symmetry
B. M. Rodriguez-Lara, R. Jauregui
Electromagnetic modes with parabolic-cylindrical symmetry and their dynamical variables are studied both in the classical and quantum realm. As a result, a new dynamical constant f…
Quantum Mechanics of Successive Measurements with Arbitrary Meter Coupling
Lars M. Johansen, Pier A. Mello
We study successive measurements of two observables using von Neumann's measurement model. The two-pointer correlation for arbitrary coupling strength allows retrieving the initial…