S-folds and 4d N=3 superconformal field theories

Kavli Affiliate: Yuji Tachikawa | First 5 Authors: Ofer Aharony, Yuji Tachikawa, Kiyonori Gomi, , | Summary: S-folds are generalizations of orientifolds in type IIB string theory, such that the geometric identifications are accompanied by non-trivial S-duality transformations. They were recently used by Garcia-Etxebarria and Regalado to provide the first construction of four dimensional N=3 […]


Continue.. S-folds and 4d N=3 superconformal field theories

S-folds and 4d N=3 superconformal field theories

Kavli Affiliate: Yuji Tachikawa | First 5 Authors: Ofer Aharony, Yuji Tachikawa, Kiyonori Gomi, , | Summary: S-folds are generalizations of orientifolds in type IIB string theory, such that the geometric identifications are accompanied by non-trivial S-duality transformations. They were recently used by Garcia-Etxebarria and Regalado to provide the first construction of four dimensional N=3 […]


Continue.. S-folds and 4d N=3 superconformal field theories

Women in physics in the United States: recruitment and retention

Kavli Affiliate: Edmund Bertschinger | First 5 Authors: Nina Abramzon, Patrice Benson, Edmund Bertschinger, Susan Blessing, Geraldine L. Cochran | Summary: Initiatives to increase the number, persistence, and success of women in physics in the US reach pre-teen girls through senior women. Programs exist at both the local and national levels. In addition, researchers have […]


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Towards a mathematical definition of Coulomb branches of $3$-dimensional $mathcal N=4$ gauge theories, II

Kavli Affiliate: Hiraku Nakajima | First 5 Authors: Alexander Braverman, Michael Finkelberg, Hiraku Nakajima, , | Summary: Consider the $3$-dimensional $mathcal N=4$ supersymmetric gauge theory associated with a compact Lie group $G_c$ and its quaternionic representation $mathbf M$. Physicists study its Coulomb branch, which is a noncompact hyper-K"ahler manifold with an $mathrm{SU}(2)$-action, possibly with singularities. […]


Continue.. Towards a mathematical definition of Coulomb branches of $3$-dimensional $mathcal N=4$ gauge theories, II

Ultrastable frequency reference at 1.56 μm using a CO molecular overtone transition with the noise immune cavity-enhanced optical heterodyne molecular spectroscopy method

Kavli Affiliate: Robert Byer | First 5 Authors: Shailendar Saraf, Paul Berceau, Alberto Stochino, Robert Byer, John Lipa | Summary: We report on an ultrastable molecular clock based on the interrogation of the 3{nu} rotational-vibrational combination band at 1563nm of carbon monoxide 12C16O. The laser stabilization scheme is based on frequency modulation (FM) saturation spectroscopy […]


Continue.. Ultrastable frequency reference at 1.56 μm using a CO molecular overtone transition with the noise immune cavity-enhanced optical heterodyne molecular spectroscopy method

Efficient and accurate modeling of multi-wavelength propagation in SOAs: a generalized coupled-mode approach

Kavli Affiliate: Larry Coldren | First 5 Authors: Cristian Antonelli, Antonio Mecozzi, Wangzhe Li, Larry Coldren, | Summary: We present a model for multi-wavelength mixing in semiconductor optical amplifiers (SOAs) based on coupled-mode equations. The proposed model applies to all kinds of SOA structures, takes into account the longitudinal dependence of carrier density caused by […]


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Closing the proximity gap in a metallic Josephson junction between three superconductors

Kavli Affiliate: Yu V. Nazarov | First 5 Authors: C. Padurariu, T. Jonckheere, J. Rech, R. Mélin, D. Feinberg | Summary: We describe the proximity effect in a short disordered metallic junction between three superconducting leads. Andreev bound states in the multi-terminal junction may cross the Fermi level. We reveal that for a quasi-continuous metallic […]


Continue.. Closing the proximity gap in a metallic Josephson junction between three superconductors

Thermal Maps of Gases in Heterogeneous Reactions

Kavli Affiliate: Omar M. Yaghi | First 5 Authors: Nanette N. Jarenwattananon, Stefan Gloeggler, Trenton Otto, Arek Melkonian, William Morris | Summary: Over 85% of all chemical industry products are made using catalysts, with the overwhelming majority of these employing heterogeneous catalysts functioning at the gas-solid interface. Consequently, optimizing catalytic reactor design attracts much effort. […]


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