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7 papers · 2 filters
Entropy production in open quantum systems: exactly solvable qubit models
V. G. Morozov, G. Röpke
We present analytical results for the time-dependent information entropy in exactly solvable two-state (qubit) models. The first model describes dephasing (decoherence) in a qubit…
Body-assisted dispersion potentials of diamagnetic atoms
Stefan Yoshi Buhmann, Hassan Safari, Stefan Scheel +1
We derive Casimir-Polder and van der Waals potentials of one or two atoms with diamagnetic properties in an arbitrary environment of magnetoelectric bodies. The calculations are ba…
Quasiprobabilities for Multipartite Quantum Correlations of Light
E. Agudelo, J. Sperling, W. Vogel
Regular quasiprobabilities are introduced for the aim of characterizing quantum correlations of multimode radiation fields. Negativities of these quantum-correlation quasiprobabili…
Analytical progress on symmetric geometric discord: Measurement-based upper bounds
Adam Miranowicz, Pawel Horodecki, Ravindra W. Chhajlany +2
Quantum correlations may be measured by means of the distance of the state to the subclass of states having well defined classical properties. In particular, a geometric measur…
Atomic nonclassicality quasiprobabilities
T. Kiesel, W. Vogel, S. L. Christensen +3
Although nonclassical quantum states are important both conceptually and as a resource for quantum technology, it is often difficult to test whether a given quantum system displays…
Optimal Squeezing in Resonance Fluorescence via Atomic-State Purification
P. Grünwald, W. Vogel
Squeezing of atomic resonance fluorescence is shown to be optimized by a properly designed environment, which can be realized by a quasi-resonant cavity. Optimal squeezing is achie…