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35 papers · 1 filter
High-Field Quasiparticle Tunneling in Bi_2Sr_2CaCu_2O_8+delta: Negative Magnetoresistance in the Superconducting State
N. Morozov, L. Krusin-Elbaum, T. Shibauchi +4
We report on the c-axis resistivity rho_c(H) in Bi_2Sr_2CaCu_2O_{8+δ} that peaks in quasi-static magnetic fields up to 60 T. By suppressing the Josephson part of the two-channel (C…
Two Stellar Mass Functions Combined into One by the Random Sampling Model of the IMF
Bruce Elmegreen
The turnover in the stellar initial mass function (IMF) at low mass suggests the presence of two independent mass functions that combine in different ways above and below a charact…
Star Formation in a Crossing Time
Bruce G. Elmegreen
Observations suggest that star formation occurs in only one or two crossing times for a range of scales spanning a factor of 1000. These observations include (1) measurements of em…
The Specific Frequency of Globular Clusters in Galaxies
Bruce G. Elmegreen
Variations in the number of globular clusters per unit galaxy luminosity, which is the specific frequency, and the mass of globular clusters per unit total available mass, are revi…
Formation and loss of hierarchical structure in two-dimensional MHD simulations of wave-driven turbulence in interstellar clouds
Bruce G. Elmegreen
Two dimensional compressible magneto-hydrodynamical (MHD) simulations run for 20 crossing times on a 800x640 grid with two stable thermal states show persistent hierarchical densit…
A Schmidt number for density matrices
Barbara M. Terhal, Pawel Horodecki
We introduce the notion of a Schmidt number of a bipartite density matrix, characterizing the minimum Schmidt rank of the pure states that are needed to construct the density matri…