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9 papers · 2 filters
Casimir-Polder interaction between an atom and a dielectric grating
Ana M. Contreras-Reyes, Romain Guérout, Paulo A. Maia Neto +3
We develop the scattering approach to calculate the exact dispersive Casimir-Polder potential between a ground-state atom and a rectangular grating. Our formalism allows, in princi…
How often is a random quantum state k-entangled?
Stanislaw J. Szarek, Elisabeth Werner, Karol Zyczkowski
The set of trace preserving, positive maps acting on density matrices of size d forms a convex body. We investigate its nested subsets consisting of k-positive maps, where k=2,...,…
Generation of coherent states of photon-added type via pathway of eigenfunctions
K. Gorska, K. A. Penson, G. H. E. Duchamp
We obtain and investigate the regular eigenfunctions of simple differential operators x^r d^{r+1}/dx^{r+1}, r=1, 2, ... with the eigenvalues equal to one. With the help of these ei…
Disorder in quantum vacuum: Casimir-induced localization of matter waves
G. A. Moreno, R. Messina, D. A. R. Dalvit +3
Disordered geometrical boundaries such as rough surfaces induce important modifications to the mode spectrum of the electromagnetic quantum vacuum. In analogy to Anderson localizat…
Characterizing Quantum Properties of a Measurement Apparatus: Insights from the Retrodictive Approach
Taoufik Amri, Julien Laurat, Claude Fabre
Using the retrodictive approach of quantum physics, we show that the state retrodicted from the response of a measurement apparatus is a convenient tool to fully characterize its q…
Hastings' additivity counterexample via Dvoretzky's theorem
Guillaume Aubrun, Stanislaw Szarek, Elisabeth Werner
The goal of this note is to show that Hastings' counterexample to the additivity of minimal output von Neumann entropy can be readily deduced from a sharp version of Dvoretzky's th…