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465 papers · 1 filter
NMR and LDA evidence for spiral magnetic order in the chain cuprate LiCu2O2
A. A Gippius, E. N. Morozova, A. S. Moskvin +5
We report on {6,7}Li nuclear magnetic resonance measurements of the spin-chain compound LiCu2O2 in the paramagnetic and magnetically ordered states. Below T about 24 K the NMR line…
Horizontal line nodes in superconducting Sr2RuO4
G. Litak, J. F. Annett, B. L. Gyorffy +1
We analyze the possibilities of triplet pairing in Sr2RuO4 based upon an idea of interlayer coupling. We have considered two models differing by the effective interactions. In one…
A 4-unit-cell superstructure in optimally doped YBa2Cu3O6.92 superconductor
Zahirul Islam, X. Liu, S. K. Sinha +8
Using high-energy diffraction we show that a 4-unit-cell superstructure, q0=(1/4,0,0), along the shorter Cu-Cu bonds coexists with superconductivity in optimally doped YBCO. A comp…
Twisted Novikov homology and circle-valued Morse theory for knots and links
Hiroshi Goda, Andrei V. Pajitnov
The Morse-Novikov number MN(L) of a smooth link L in the three-dimensional sphere is by definition the minimal possible number of critical points of a regular circle-valued Morse f…
Loop Quantum Cosmology and Boundary Proposals
Martin Bojowald, Kevin Vandersloot
For many years, the most active area of quantum cosmology has been the issue of choosing boundary conditions for the wave function of a universe. Recently, loop quantum cosmology,…
Entropic Priors
Ariel Caticha, Roland Preuss
The method of Maximum (relative) Entropy (ME) is used to translate the information contained in the known form of the likelihood into a prior distribution for Bayesian inference. T…