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62 papers · 1 filter
Self-sustained micromechanical oscillator with linear feedback
Changyao Chen, Damián H. Zanette, Jeffrey R. Guest +2
Autonomous oscillators, such as clocks and lasers, produce periodic signals \emph{without} any external frequency reference. In order to sustain stable periodic motions, there need…
Phase-space representations of SIC-POVM fiducial states
Marcos Saraceno, Leonardo Ermann, Cecilia Cormick
The problem of finding symmetric informationally complete POVMs (SIC-POVMs) has been solved numerically for all dimensions up to 67 (A.J. Scott and M. Grassl, {\it J. Math. Phy…
Direct observation of coherent energy transfer in nonlinear micro-mechanical oscillators
Changyao Chen, Damián H. Zanette, David Czaplewski +2
Energy dissipation is an unavoidable phenomenon of physical systems that are directly coupled to an external environmental bath. The ability to engineer the processes responsible f…
Quantum friction between graphene sheets
M. Belén Farias, César D. Fosco, Fernando C. Lombardo +1
We study the Casimir friction phenomenon in a system consisting of two flat, infinite, and parallel graphene sheets, which are coupled to the vacuum electromagnetic (EM) field. Tho…
Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +397
We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit h…
A targeted search for point sources of EeV photons with the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +397
Simultaneous measurements of air showers with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for EeV photon point sources. Several…