149,728 research outputs found
Chern-Simons-matter dualities with SO and USp gauge groups
No full textIn the last few years several dualities were found between the low-energy behaviors of Chern-Simons-matter theories with unitary gauge groups coupled to scalars, and similar theories coupled to fermions. In this paper we generalize those dualities to orthogonal and symplectic gauge groups. In particular, we conjecture dualities between SO(N)kChern-Simons theories coupled to Nfreal scalars in the fundamental representation, and SO(k)–N + N f / 2theories coupled to Nfreal (Majorana) fermions in the fundamental. For Nf= 0 these are just level-rank dualities of pure Chern-Simons theories, whose precise form we clarify. They lead us to propose new gapped boundary states of topological insulators and superconductors. For k = 1 we get an interesting low-energy duality between Nffree Majorana fermions and an SO(N)1 Chern-Simons theory coupled to Nfscalar fields (with Nf≤ N − 2)
Xenia Simons
No full textXenia’s family was affected by the Great Depression. They finally settled in Columbus, where her father was able to make a go of his hickory furniture business with the Columbus Hickory Chair Company. Xenia recalled that she never realized her family was struggling when she was at Columbus High School because so many people were affected by the Depression. High school is where she developed her appreciation for fine art and love of reading. She graduated in 1934.Destination Indiana - Xenia Simons Miller Journe
A taxonomy of blogs
No full text"The word \u27blog\u27 doesn\u27t really give one much of an idea about the content or nature of a given online site. In fact, author and freelance journalist, Margaret Simons, describes the term as \u27manifestly inadequate\u27, because it offers so little differentiation. She says there\u27s now an urgent need for a new vocabulary for internet-based publications. And being no slouch herself, she\u27s taken her own initial stab at drawing up a list of the different types of online sites that classify as blogs. She\u27s come up with nine."
See below in Related Content for Margaret Simons\u27 taxonomy of blogs
The Simons Observatory: Astro2020 Decadal Project Whitepaper
No full textInternational audienceThe Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough discoveries in fundamental physics, cosmology, and astrophysics. Supported by the Simons Foundation, the Heising-Simons Foundation, and with contributions from collaborating institutions, SO will see first light in 2021 and start a five year survey in 2022. SO has 287 collaborators from 12 countries and 53 institutions, including 85 students and 90 postdocs. The SO experiment in its currently funded form ('SO-Nominal') consists of three 0.4 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT). Optimized for minimizing systematic errors in polarization measurements at large angular scales, the SATs will perform a deep, degree-scale survey of 10% of the sky to search for the signature of primordial gravitational waves. The LAT will survey 40% of the sky with arc-minute resolution. These observations will measure (or limit) the sum of neutrino masses, search for light relics, measure the early behavior of Dark Energy, and refine our understanding of the intergalactic medium, clusters and the role of feedback in galaxy formation. With up to ten times the sensitivity and five times the angular resolution of the Planck satellite, and roughly an order of magnitude increase in mapping speed over currently operating ("Stage 3") experiments, SO will measure the CMB temperature and polarization fluctuations to exquisite precision in six frequency bands from 27 to 280 GHz. SO will rapidly advance CMB science while informing the design of future observatories such as CMB-S4
Gravitational Chern–Simons, and Chern–Simons gravity in all dimensions
No full textThe construction of Chern–Simons gravities (CSG) and gravitational Chern–Simons densities
(GCS) are considered. Since both these are definied the non-Abelian (nA) Chern–Simons densities (CS)
in the appropriate representations, and the latter are defined only in odd dimensions, so are the CSG and the
GCS. To overcome this restriction, it is proposed that instead of employing nA CS densities, the Higgs–CS
(HCS) densities are employed, the latter being defined in all dimensions and hence leading to their gravitational counterparts, HCS-Gravity (HCSG) Lagrangians and gravitational-HCS (GHCS) densities, not all of
them restricted to odd dimensions. A detailed definition for a GHCS density in 3 + 1 dimensions is presented,
and, a new result in black hole solutions in CSG gravity models in all odd dimensions is presented.publishe
Chern–Simons States in SO(1,n)Yang–Mills Gauge Theory of Quantum Gravity
No full textWe discuss a quantization of the Yang–Mills theory with an internal symmetry group SO(1,n) treated as a unified theory of all interactions. In one-loop calculations, we show that Einstein gravity can be considered as an approximation to gauge theory. We discuss the role of the Chern–Simons wave functions in the quantization
Topologically gauged superconformal Chern-Simons matter theories.
No full textAbstract: By coupling N = 8 superconformal matter to N = 8 superconformal Chern- Simons gravity in three dimensions we obtain theories with novel terms in the scalar po- tential leading to AdS3 solutions and superconformal symmetry breaking. If we start from the theory derived by Bagger, Lambert and Gustavsson, our coupled theory either inherits the SO(4) gauge group or reduces it to SO(3). If the construction is instead based on a free matter theory we find that the gravitational topological gauging also requires the in- troduction of a Chern-Simons gauge sector resulting in a consistent theory for any SO(N) gauge group
Topologically gauged superconformal Chern-Simons matter theories.
No full textAbstract: By coupling N = 8 superconformal matter to N = 8 superconformal Chern- Simons gravity in three dimensions we obtain theories with novel terms in the scalar po- tential leading to AdS3 solutions and superconformal symmetry breaking. If we start from the theory derived by Bagger, Lambert and Gustavsson, our coupled theory either inherits the SO(4) gauge group or reduces it to SO(3). If the construction is instead based on a free matter theory we find that the gravitational topological gauging also requires the in- troduction of a Chern-Simons gauge sector resulting in a consistent theory for any SO(N) gauge group
Non-Abelian Chern-Simons coefficient in the Higgs phase
No full textWe calculate the one loop corrections to the Chern-Simons coefficient κ in the Higgs phase of Yang-Mills Chern-Simons Higgs theories. When the gauge group is SU(N), we show, by taking into account the effect of the would-be Chern-Simons term, that the corrections are always integer multiples of 1/4π, as they should be for the theories to be quantum-mechanically consistent. In particular, the correction is vanishing for SU(2). The same method can also be applied to the case where the gauge group is SO(N). The result for SO(2) agrees with that found in the Abelian Chern-Simons theories. Therefore, the calculation provides us with a unified understanding of the quantum correction to the Chern-Simons coefficient.國外SCI紙本US
The Simons Observatory: Astro2020 Decadal Project Whitepaper
No full textInternational audienceThe Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough discoveries in fundamental physics, cosmology, and astrophysics. Supported by the Simons Foundation, the Heising-Simons Foundation, and with contributions from collaborating institutions, SO will see first light in 2021 and start a five year survey in 2022. SO has 287 collaborators from 12 countries and 53 institutions, including 85 students and 90 postdocs. The SO experiment in its currently funded form ('SO-Nominal') consists of three 0.4 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT). Optimized for minimizing systematic errors in polarization measurements at large angular scales, the SATs will perform a deep, degree-scale survey of 10% of the sky to search for the signature of primordial gravitational waves. The LAT will survey 40% of the sky with arc-minute resolution. These observations will measure (or limit) the sum of neutrino masses, search for light relics, measure the early behavior of Dark Energy, and refine our understanding of the intergalactic medium, clusters and the role of feedback in galaxy formation. With up to ten times the sensitivity and five times the angular resolution of the Planck satellite, and roughly an order of magnitude increase in mapping speed over currently operating ("Stage 3") experiments, SO will measure the CMB temperature and polarization fluctuations to exquisite precision in six frequency bands from 27 to 280 GHz. SO will rapidly advance CMB science while informing the design of future observatories such as CMB-S4
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