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Duality Gap, Computational Complexity and NP Completeness: A Survey
Duality Gap Computational Complexity NP Completeness
2011/2/28
In this paper, we survey research that studies the connection between the computational complexity of optimization problems on the one hand, and the duality gap between the primal and dual optimizatio...
Chiral symmetry breaking revisited: the gap equation with lattice ingredients
Chiral symmetry breaking revisited the gap equation lattice ingredients
2010/12/27
We study chiral symmetry breaking in QCD, using as ingredients in the quark gap equation recent lattice results for the gluon and ghost propagators. The Ansatz employed for the quark-gluon vertex is ...
Chiral symmetry breaking revisited: the gap equation with lattice ingredients
Chiral symmetry breaking revisited the gap equation lattice ingredients
2011/1/7
We study chiral symmetry breaking in QCD, using as ingredients in the quark gap equation recent lattice results for the gluon and ghost propagators. The Ansatz employed for the quark-gluon vertex is p...
Gamma-Ray Burst Polarimeter - GAP - aboard the Small Solar Power Sail Demonstrator IKAROS
Gamma-Ray Burst Polarimeter - GAP - aboard the Small Solar Power Sail Demonstrator IKAROS
2011/1/11
The small solar power sail demonstrator "IKAROS" is a Japanese engineering verification spacecraft launched by H-IIA rocket on May 21, 2010 at JAXA Tanegashima Space Center. IKAROS has a huge sail wit...
First principles investigation of Bi$_6$Ti$_4$O$_{17}$: oxide ferroelectricity with a low band gap
First principles investigation low band gap
2010/11/25
We report first principles studies of the hypothetical compound Bi6Ti4O17, which is an alternate stacking of the ferroelectric Bi4Ti3O12. We find that this compound is ferroelectric, similar to Bi4Ti3...
Direct observation of band-gap closure for a semiconducting carbon nanotube in a large parallel magnetic field
Direct observation of band-gap closure semiconducting carbon nanotube large parallel magnetic field
2010/11/23
We have investigated the magnetoconductance of semiconducting carbon nanotubes (CNTs) in
pulsed, parallel magnetic elds up to 60 T, and report the direct observation of the predicted band-gap closur...
Helical Edge Modes near Transition to Topological Insulator with Indirect Gap
topological insulator edge mode indirect gap particle-hole symmetry semimetal annihilator
2010/11/19
Helical edge modes are characteristic of topological insulators in two dimensions. This paper
demonstrates that helical edge modes remain across transitions to ordinary insulators or to semimetals un...
Surface Gap Soliton Ground States for the Nonlinear Schrödinger Equation
Surface Gap Soliton Ground States the Nonlinear Schrö dinger Equation
2010/11/18
We consider the nonlinear Schr\"{o}dinger equation $(-\Delta +V(x))u = \Gamma(x) |u|^{p-1}u$, $x\in \R^n$ with $V(x) = V_1(x) \chi_{\{x_1>0\}}(x)+V_2(x) \chi_{\{x_1<0\}}(x)$ and $\Gamma(x) = \Gamma_1(...
On the possibility of obtaining MOSFET-like performance and sub-60 mV/decade swing in 1D broken-gap tunnel transistors
obtaining MOSFET-like performance sub-60 mV/decade
2010/11/25
Tunneling field-effect transistors (TFETs) have gained a great deal of recent interest due to their potential to reduce power dissipation in integrated circuits. One major challenge for TFETs so far h...
Chiral symmetry breaking revisited: the gap equation with lattice ingredients
Chiral symmetry breaking Gluon and ghost propagators Schwinger-Dyson equations dynamical gluon mass generation
2011/1/14
We study chiral symmetry breaking in QCD, using as ingredients in the quark gap equation recent lattice results for the gluon and ghost propagators.
Intrinsic ergodicity beyond specification: beta-shifts, S-gap shifts, and their factors
beta-shifts S-gap shifts factors
2010/11/18
We give sufficient conditions for a shift space $(\Sigma,\sigma)$ to be intrinsically ergodic, along with sufficient conditions for every subshift factor of $\Sigma$ to be intrinsically ergodic. As a...
Progress towards fabrication of Th:229-doped high energy band-gap crystals for use as a solid-state optical frequency reference
Th:229-doped high energy band-gap crystals solid-state optical frequency
2010/11/12
We have recently described a novel method for the construction of a solid-state optical frequency reference based on doping $^{229}$Th into high energy band-gap crystals. Since nuclear transitions ar...
Third Harmonic Generation at 223nm in the Metallic Regime of GaP
Third Harmonic 223nm the Metallic Regime of GaP
2010/11/12
We demonstrate second and third harmonic generation from a GaP substrate 500{\mu}m thick. The second harmonic field is tuned at the absorption resonance at 335nm, and the third harmonic signal is tune...
Rapidly fluctuating orbital occupancy above the orbital ordering transition in spin-gap compounds
Rapidly fluctuating orbital orbital ordering spin-gap compounds
2010/11/19
Several spin systems with low dimensionality develop a spin-dimer phase within a molecular orbital below TS, competing with long-range antiferromagnetic order. Very often, preferential orbital occupan...
Inter-particle gap distribution and spectral rigidity of totally asymmetric simple exclusion process with open boundaries
Inter-particle gap distribution spectral rigidity totally asymmetric simple exclusion process open boundaries
2010/11/10
We consider the one-dimensional totally asymmetric simple exclusion model (TASEP model) with open boundary conditions and present the analytical computations leading to the exact formula for distance...
