Berry phase and Anomalous Hall Effect in a Three-orbital Tight-binding Hamiltonian

Kavli Affiliate: Joel Moore | First 5 Authors: Yan He, Joel Moore, C. M. Varma, , | Summary: We consider the Anomalous Hall (AH) state induced by interactions in a three-orbital per unit-cell model. To be specific we consider a model appropriate for the Copper-Oxide lattice to highlight the necessary conditions for time-reversal breaking states […]


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Active noise cancellation in a suspended interferometer

Kavli Affiliate: Rana Adhikari | First 5 Authors: Jennifer C. Driggers, Matthew Evans, Keenan Pepper, Rana Adhikari, | Summary: We demonstrate feed-forward vibration isolation on a suspended Fabry-Perot interferometer using Wiener filtering and a variant of the common Least Mean Square (LMS) adaptive filter algorithm. We compare the experimental results with theoretical estimates of the […]


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Readout system with on-board demodulation for CMB polarization experiments using coherent polarimeter arrays

Kavli Affiliate: Takeo Higuchi | First 5 Authors: Koji Ishidoshiro, Makoto Nagai, Takeo Higuchi, Masaya Hasegawa, Masashi Hazumi | Summary: B-modes are special patterns in cosmic microwave background (CMB) polarization. The detection of them is a smoking-gun signature of primordial gravitational waves. The generic strategy of the CMB polarization experiments is to employ a large […]


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The Outer Limits of Galaxy Clusters: Observations to the Virial Radius with Suzaku, XMM, and Chandra

Kavli Affiliate: Marshall Bautz | First 5 Authors: Eric D. Miller, Marshall Bautz, Jithin George, Richard Mushotzky, David Davis | Summary: The outskirts of galaxy clusters, near the virial radius, remain relatively unexplored territory and yet are vital to our understanding of cluster growth, structure, and mass. In this presentation, we show the first results […]


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Atomic-resolution spectroscopic imaging of ensembles of nanocatalyst particles across the life of a fuel cell

Kavli Affiliate: Lena Fitting Kourkoutis | First 5 Authors: Huolin L. Xin, Julia A. Mundy, Zhongyi Liu, Randi Cabezas, Robert Hovden | Summary: The thousandfold increase in data-collection speed enabled by aberration-corrected optics allows us to overcome an electron microscopy paradox – how to obtain atomic-resolution chemical structure in individual nanoparticles, yet record a statistically […]


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Measuring the spatial extent of individual localized photonic states

Kavli Affiliate: Kobus Kuipers | First 5 Authors: Marko Spasenovic, Daryl M. Beggs, Philippe Lalanne, Thomas F. Krauss, L. | Summary: We measure the spatial extent of individual localized photonic states in a slow-light photonic crystal waveguide. The size of the states is measured by perturbing each state individually through a local electromagnetic interaction with […]


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One Gravitational Potential or Two? Forecasts and Tests

Kavli Affiliate: Edmund Bertschinger | First 5 Authors: Edmund Bertschinger, , , , | Summary: The metric of a perturbed Robertson-Walker spacetime is characterized by three functions: a scale-factor giving the expansion history and two potentials which generalize the single potential of Newtonian gravity. The Newtonian potential induces peculiar velocities and, from these, the growth […]


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A photonic crystal nanocavity laser in an optically very thick slab

Kavli Affiliate: Axel Scherer | First 5 Authors: Se-Heon Kim, Jingqing Huang, Axel Scherer, , | Summary: A photonic crystal (PhC) nanocavity formed in an optically very thick slab can support reasonably high-Q modes for lasing. Experimentally, we demonstrate room-temperature pulsed lasing operation from the PhC dipole mode emitting at 1324 nm, which is fabricated […]


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