474 citations
- University of Illinois Urbana-ChampaignUS46 papers
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9 papers · 1 filter
On discretization of C*-algebras
Chris Heunen, Manuel L. Reyes
The C*-algebra of bounded operators on the separable infinite-dimensional Hilbert space cannot be mapped to a W*-algebra in such a way that each unital commutative C*-subalgebra C(…
Acoustic Measurements of the Stripe and the Bubble Quantum Hall Phases
M. E. Msall, W. Dietsche
We launch surface acoustic waves (SAW) along both the and the directions of a Hall bar and measure the anisotropic conductivity in a high purity GaAs 2-D elec…
Recognizing Right-Angled Coxeter Groups Using Involutions
Charles Cunningham, Andy Eisenberg, Adam Piggott +1
We consider the question of determining whether a given group (especially one generated by involutions) is a right-angled Coxeter group. We describe a group invariant, the involuti…
Trumpet Slices in Kerr Spacetimes
Kenneth A. Dennison, Thomas W. Baumgarte, Pedro J. Montero
We introduce a new time-independent family of analytical coordinate systems for the Kerr spacetime representing rotating black holes. We also propose a (2+1)+1 formalism for the ch…
Skew Calabi-Yau triangulated categories and Frobenius Ext-algebras
Manuel Reyes, Daniel Rogalski, James J. Zhang
We investigate the conditions that are sufficient to make the Ext-algebra of an object in a (triangulated) category into a Frobenius algebra and compute the corresponding Nakayama…
Scattering equations and BCJ relations for gauge and gravitational amplitudes with massive scalar particles
Stephen G. Naculich
We generalize the scattering equations to include both massless and massive particles. We construct an expression for the tree-level n-point amplitude with n-2 gluons or gravitons…