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615 papers · 1 filter
Non-line-of-sight Node Localization based on Semi-Definite Programming in Wireless Sensor Networks
Hongyang Chen, Kenneth W. K. Lui, Zizhuo Wang +2
An unknown-position sensor can be localized if there are three or more anchors making time-of-arrival (TOA) measurements of a signal from it. However, the location errors can be ve…
Pulsed Nuclear Pumping and Spin Diffusion in a Single Charged Quantum Dot
Thaddeus D. Ladd, David Press, Kristiaan De Greve +7
We report the observation of a feedback process between the nuclear spins in a single charged quantum dot and its trion transition, driven by a periodic sequence of optical pulses.…
Representations of Quiver Hecke Algebras via Lyndon Bases
David Hill, George Melvin, Damien Mondragon
A new class of algebras have been introduced by Khovanov and Lauda and independently by Rouquier. These algebras categorify one-half of the Quantum group associated to arbitrary Ca…
Bose-Einstein condensate in a rapidly rotating non-symmetric trap
Alexander L. Fetter
A rapidly rotating Bose-Einstein condensate in a symmetric two-dimensional harmonic trap can be described with the lowest Landau-level set of single-particle states. The condensate…
Topological Insulator Nanowires and Nanoribbons
Desheng Kong, Jason C. Randel, Hailin Peng +7
Recent theoretical calculations and photoemission spectroscopy measurements on the bulk Bi2Se3 material show that it is a three-dimensional topological insulator possessing conduct…
Suzaku X-Ray Imaging and Spectroscopy of Cassiopeia A
Y. Maeda, Y. Uchiyama, A. Bamba +26
Suzaku X-ray observations of a young supernova remnant, Cassiopeia A, were carried out. K-shell transition lines from highly ionized ions of various elements were detected, includi…