1,585 research outputs found
DAMPE space mission: first data
The DAMPE (DArk Matter Particle Explorer) satellite was launched on December
17, 2015 and started its data taking operation a few days later.
DAMPE has a large geometric factor () and provides good
tracking, calorimetric and charge measurements for electrons, gammas rays and
nuclei. This will allow precise measurement of cosmic ray spectra from tens of
up to about . In particular, the energy region between $1-100\
TeVGeVTeV$, thus giving the opportunity to identify possible contribution
of nearby sources. A report on the mission goals and status is presented,
together with the on-orbit detector performance and the first data coming from
space.Comment: XXV ECRS 2016 Proceedings - eConf C16-09-04.
Coordinate representation for non Hermitian position and momentum operators
In this paper we undertake an analysis of the eigenstates of two non
self-adjoint operators and similar, in a suitable sense, to
the self-adjoint position and momentum operators and
usually adopted in ordinary quantum mechanics. In particular we discuss
conditions for these eigenstates to be {\em biorthogonal distributions}, and we
discuss few of their properties. We illustrate our results with two examples,
one in which the similarity map between the self-adjoint and the non
self-adjoint is bounded, with bounded inverse, and the other in which this is
not true. We also briefly propose an alternative strategy to deal with
and , based on the so-called {\em quasi *-algebras}.Comment: Accepted in Proceedings of the Royal Society
Dynamics for a quantum parliament
In this paper we propose a dynamical approach based on the
Gorini-Kossakowski-Sudarshan-Lindblad equation for a problem of decision
making. More specifically, we consider what was recently called a quantum
parliament, asked to approve or not a certain law, and we propose a model of
the connections between the various members of the parliament, proposing in
particular some special form of the interactions giving rise to a {\em
collaborative} or non collaborative behaviour
Study of neutron-rich calcium isotopes with a realistic shell-model interaction
We have studied neutron-rich calcium isotopes in terms of the shell model
employing a realistic effective interaction derived from the CD-Bonn
nucleon-nucleon potential. The short-range repulsion of the potential is
renormalized by way of the V-low-k approach. The calculated results are in very
good agreement with the available experimental data, thus supporting our
predictions for the hitherto unknown spectra of 53-56Ca nuclei. In this
context, the possible existence of an N=34 shell closure is discussed.Comment: 11 pages, 3 figures, to be published in Physical Review
-deformed harmonic oscillators
We analyze systematically several deformations arising from two-dimensional
harmonic oscillators which can be described in terms of -pseudo
bosons. They all give rise to exactly solvable models, described by non
self-adjoint hamiltonians whose eigenvalues and eigenvectors can be found
adopting the quite general framework of the so-called -pseudo bosons.
In particular, we show that several models previously introduced in the
literature perfectly fit into this scheme.Comment: in press in International Journal of Theoretical Physic
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