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157 papers · 1 filter
Reduced density matrix and entanglement entropy of permutationally invariant quantum many-body systems
V. Popkov, Mario Salerno
In this paper we discuss the properties of the reduced density matrix of quantum many body systems with permutational symmetry and present basic quantification of the entanglement…
Observational evidence of quasar feedback quenching star formation at high redshift
M. Cano-Diaz, R. Maiolino, A. Marconi +3
Most galaxy evolutionary models require quasar feedback to regulate star formation in their host galaxies. In particular, at high redshift, models expect that feedback associated w…
A new approach to cross-bifix-free sets
Stefano Bilotta, Elisa Pergola, Renzo Pinzani
Cross-bifix-free sets are sets of words such that no prefix of any word is a suffix of any other word. In this paper, we introduce a general constructive method for the sets of cro…
EChO - Exoplanet Characterisation Observatory
G. Tinetti, J. P. Beaulieu, T. Henning +131
A dedicated mission to investigate exoplanetary atmospheres represents a major milestone in our quest to understand our place in the universe by placing our Solar System in context…
Stellar metallicity of star-forming galaxies at z ~ 3
Veronica Sommariva, Filippo Mannucci, Giovanni Cresci +5
The stellar metallicity is a direct measure of the amount of metals present in a galaxy, as a large part of the metals lie in its stars. In this paper we investigate new stellar me…
On the Waring problem for polynomial rings
Ralf Fröberg, Giorgio Ottaviani, Boris Shapiro
In this note we discuss an analog of the classical Waring problem for C[x_0, x_1,...,x_n]. Namely, we show that a general homogeneous polynomial p \in C[x_0,x_1,...,x_n] of degree…