Astrophysics – Page 480 – Kavli Institute Pre-Print Publications

Dynamic scaling properties of multistep polarization response in ferroelectrics

Posted by klaurent March 31, 2022Peking

Kavli Affiliate: Ke Wang | First 5 Authors: Yuri A. Genenko, Sergey Zhukov, Maohua Zhang, Ke Wang, Jurij Koruza | Summary: Ferroelectrics are multifunctional smart materials finding applications in sensor technology, micromechanical actuation, digital information storage etc. Their most fundamental property is the ability of polarization switching under applied electric field. In particular, understanding of […]

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Symmetries of the Primordial Sky

Posted by klaurent March 31, 2022April 11, 2022Chicago

Kavli Affiliate: Craig Hogan | First 5 Authors: Craig Hogan, , , , | Summary: Quantum field theory, which is generally used to describe the origin of large-scale gravitational perturbations during cosmic inflation, has been shown to omit an important physical effect in curved space-time, the nonlocal entanglement among quantized modes from their gravitational effect […]

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Undecidable problems in quantum field theory

Posted by klaurent March 30, 2022April 11, 2022Tokyo

Kavli Affiliate: Yuji Tachikawa | First 5 Authors: Yuji Tachikawa, , , , | Summary: In the hope of providing some intellectual entertainment on April Fools’ day of this dark year, we point out that some questions in quantum field theory are undecidable in a precise mathematical sense. More concretely, it will be demonstrated that […]

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Undecidable problems in quantum field theory

Posted by dbos March 30, 2022Tokyo

Kavli Affiliate: Yuji Tachikawa | First 5 Authors: Yuji Tachikawa, , , , | Summary: We point out that some questions in quantum field theory are undecidable in a precise mathematical sense. More concretely, it will be demonstrated that there is no algorithm answering whether a given 2d supersymmetric Lagrangian theory breaks supersymmetry or not. […]

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Undecidable problems in quantum field theory

Posted by dbos March 30, 2022Tokyo

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Undecidable problems in quantum field theory

Posted by dbos March 30, 2022Tokyo

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Searching for axion-like time-dependent cosmic birefringence with SPT-3G

Posted by March 30, 2022Stanford

Kavli Affiliate: Chao-Lin Kuo | First 5 Authors: K. R. Ferguson, A. J. Anderson, N. Whitehorn, P. A. R. Ade, M. Archipley | Summary: Ultralight axion-like particles (ALPs) are compelling dark matter candidates because of their potential to resolve small-scale discrepancies between $Lambda$CDM predictions and cosmological observations. Axion-photon coupling induces a polarization rotation in linearly […]

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Searching for axion-like time-dependent cosmic birefringence with data from SPT-3G

Posted by March 30, 2022Stanford

Kavli Affiliate: Chao-Lin Kuo | First 5 Authors: K. R. Ferguson, A. J. Anderson, N. Whitehorn, P. A. R. Ade, M. Archipley | Summary: Ultralight axionlike particles (ALPs) are compelling dark matter candidates because of their potential to resolve small-scale discrepancies between $Lambda$CDM predictions and cosmological observations. Axion-photon coupling induces a polarization rotation in linearly […]

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The Latest Constraints on Inflationary B-modes from the BICEP/Keck Telescopes

Posted by March 30, 2022Stanford

Kavli Affiliate: Chao-Lin Kuo | First 5 Authors: BICEP/Keck Collaboration, :, P. A. R. Ade, Z. Ahmed, M. Amiri | Summary: For the past decade, the BICEP/Keck collaboration has been operating a series of telescopes at the Amundsen-Scott South Pole Station measuring degree-scale $B$-mode polarization imprinted in the Cosmic Microwave Background (CMB) by primordial gravitational […]

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Why are we still using 3D masses for cluster cosmology?

Posted by klaurent March 30, 2022April 11, 2022Chicago

Kavli Affiliate: Salman Habib | First 5 Authors: Stijn N. B. Debackere, Henk Hoekstra, Joop Schaye, Katrin Heitmann, Salman Habib | Summary: The abundance of clusters of galaxies is highly sensitive to the late-time evolution of the matter distribution, since clusters form at the highest density peaks. However, the 3D cluster mass cannot be inferred […]

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