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16 papers · 1 filter
Role of microstructure in porous silicon gas sensors for NO
Zeno Gaburro, Paolo Bettotti, Massimo Saiani +4
Electrical conductivity of porous silicon fabricated form heavily doped p-type silicon is very sensitive to NO, even at concentrations below 100 ppb. However, sensitivity stron…
Fluctuations of K-band galaxy counts
M. Lopez-Corredoira, J. E. Betancort-Rijo
We measure the variance in the distribution of off-plane (|b|>20 deg.) galaxies with m_K<13.5 from the 2MASS K-band survey in circles of diameter between 0.344 deg. and 57.2 deg. T…
The Nature of the Local Group
Antonio Aparicio
The Local Group provides an interesting and representative sample of galaxies in the rest of the Universe. The high accuracy with which many problems can be addressed in Local Grou…
Poisson-Jacobi reduction of homogeneous tensors
J. Grabowski, D. Iglesias, J. C. Marrero +2
The notion of homogeneous tensors is discussed. We show that there is a one-to-one correspondence between multivector fields on a manifold , homogeneous with respect to a vector…
Action scales for quantum decoherence and their relation to structures in phase space
Daniel Alonso, S. Brouard, Jose P. Palao +1
A characteristic action is defined whose magnitude determines some properties of the expectation value of a general quantum displacement operator. These properties are related…
Optimal control theory for unitary transformations
Jose P. Palao, R. Kosloff
The dynamics of a quantum system driven by an external field is well described by a unitary transformation generated by a time dependent Hamiltonian. The inverse problem of finding…