272 citations
- G. Pietrzyński3 profiles10 · h 66
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- A. Udalski2 profiles6 · h 72
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- D. Geisler2 profiles4 · h 55
- Fabio Bresolin4
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- R. E. Mennickent4
- Rolf‐Peter Kudritzki4
- T. Richtler2 profiles4 · h 31
- M. Hilker2 profiles3 · h 52
- University of WarsawPL9 papers
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- Cerro Tololo Inter-American ObservatoryCL4 papers
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- National Institute for AstrophysicsIT4 papers
- Pontificia Universidad Católica de ValparaísoCL4 papers
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- École Normale Supérieure de LyonFR3 papers
10 papers · 1 filter
Evolving Lorentzian wormholes supported by phantom matter and cosmological constant
Mauricio Cataldo, Sergio del Campo, Paul Minning +1
In this paper we study the possibility of sustaining an evolving wormhole via exotic matter made of phantom energy in the presence of a cosmological constant. We derive analytical…
A survey on Cox rings
Antonio Laface, Mauricio Velasco
We survey the construction of the Cox ring of an algebraic variety X and study the birational geometry of X when its Cox ring is finitely generated.
The PN.S Elliptical Galaxy Survey: the dark matter in NGC 4494
N. R. Napolitano, A. J. Romanowsky, L. Coccato +12
We present new Planetary Nebula Spectrograph observations of the ordinary elliptical galaxy NGC 4494, resulting in positions and velocities of 255 PNe out to 7 effective radii (25…
A spectroscopic confirmation of the Bootes II dwarf spheroidal
A. Koch, M. I. Wilkinson, J. T. Kleyna +6
We present a new suite of photometric and spectroscopic data for the faint Bootes II dwarf spheroidal galaxy candidate. Our deep photometry, obtained with the INT/WFC, suggests a d…
Generating mixtures of spatial qubits
G. Lima, F. A. Torres-Ruiz, L. Neves +3
In a recent letter [Phys. Rev. Lett. 94, 100501 (2005)], we presented a scheme for generating pure entangled states of spatial qudits (-dimensional quantum systems) by using the…
Entanglement of distant atoms by projective measurement: The role of detection efficiency
Stefano Zippilli, Georgina A. Olivares-Renteria, Giovanna Morigi +3
We assess proposals for entangling two distant atoms by measurement of emitted photons, analyzing how their performance depends on the photon detection efficiency. We consider sche…