December 2020 – Page 4 – Kavli Institute Pre-Print Publications

Bloch-Lorentz magnetoresistance oscillations in delafossites

Posted by dbos December 15, 2020Delft

Kavli Affiliate: Anton Akhmerov | First 5 Authors: Kostas Vilkelis, Lin Wang, Anton Akhmerov, , | Summary: Recent measurements of the out-of-plane magnetoresistance of delafossites (PdCoO$_2$ and PtCoO$_2$) observed oscillations closely resembling the Aharonov-Bohm effect. Here, we show that the magnetoresistance oscillations are explained by the Bloch-like oscillations of the out-of-plane electron trajectories. We develop […]

Continue..

Bloch-Lorentz magnetoresistance oscillations in delafossites

Posted by klaurent December 15, 2020Delft

Kavli Affiliate: Anton Akhmerov | First 5 Authors: Kostas Vilkelis, Lin Wang, Anton Akhmerov, , | Summary: Recent measurements of the out-of-plane magnetoresistance of delafossites (PdCoO$_2$ and PtCoO$_2$) observed oscillations which closely resemble the Aharanov-Bohm effect. We develop a semiclassical theory of these oscillations and show that they are a consequence of the quasi-2D dispersion […]

Continue..

Probing Inflation with Precision Bispectra

Posted by klaurent December 15, 2020Cambridge

Kavli Affiliate: E. P. S. Shellard | First 5 Authors: Philip Clarke, E. P. S. Shellard, , , | Summary: Calculating the primordial bispectrum predicted by a model of inflation and comparing it to what we see in the sky is very computationally intensive, necessitating layers of approximations and limiting the models which can be […]

Continue..

Gravitational wave constraints on the primordial black hole dominated early universe

Posted by klaurent December 15, 2020Tokyo

Kavli Affiliate: Misao Sasaki | First 5 Authors: Guillem Domènech, Chunshan Lin, Misao Sasaki, , | Summary: We calculate the gravitational waves (GWs) induced by the density fluctuations due to inhomogeneous distribution of primordial black holes (PBHs) in the case where PBHs eventually dominate and reheat the universe by Hawking evaporation. The initial PBH density […]

Continue..

Games and Computational Complexity

Posted by klaurent December 14, 2020Stanford

Kavli Affiliate: Zeeshan Ahmed | First 5 Authors: Zeeshan Ahmed, Alapan Chaudhuri, Kunwar Shaanjeet Singh Grover, Hrishi Narayanan, Manasvi Vaidyula | Summary: Computers are known to solve a wide spectrum of problems, however not all problems are computationally solvable. Further, the solvable problems themselves vary on the amount of computational resources they require for being […]

Continue..

Discovery of a damped Ly$α$ galaxy at z $sim$ 3 towards the quasar SDSS J011852+040644

Posted by klaurent Peking

Kavli Affiliate: Linhua Jiang | First 5 Authors: Ravi Joshi, Michele Fumagalli, Raghunathan Srianand, Pasquier Noterdaeme, Patrick Petitjean | Summary: We report the detection of the host galaxy of a damped Ly$alpha$ system (DLA) with log N(HI) $ [rm cm^{-2}]$ = $21.0 pm 0.10$ at $z approx 3.0091$ towards the background quasar SDSS J011852+040644 using […]

Continue..

Tiny-box: A tool for the versatile development and characterization of low noise fast X-ray imaging detectors

Posted by klaurent December 13, 2020Stanford

Kavli Affiliate: Steven Allen | First 5 Authors: Tanmoy Chattopadhyay, Sven Herrmann, Steven Allen, Jack Hirschman, Glenn Morris | Summary: X-ray Charge Coupled Devices (CCDs) have been the workhorse for soft X-ray astronomical instruments for the past quarter century. They provide broad energy response, extremely low electronic read noise, and good energy resolution in soft […]

Continue..

Tiny-box: A tool for the versatile development and characterization of low noise fast X-ray imaging detectors

Posted by klaurent December 13, 2020MIT

Kavli Affiliate: Richard Foster | First 5 Authors: Tanmoy Chattopadhyay, Sven Herrmann, Steven Allen, Jack Hirschman, Glenn Morris | Summary: X-ray Charge Coupled Devices (CCDs) have been the workhorse for soft X-ray astronomical instruments for the past quarter century. They provide broad energy response, extremely low electronic read noise, and good energy resolution in soft […]

Continue..

Interferometric Constraints on Spacelike Coherent Rotational Fluctuations

Posted by klaurent December 13, 2020MIT

Kavli Affiliate: Rainer Weiss | First 5 Authors: Jonathan W. Richardson, Ohkyung Kwon, H. Richard Gustafson, Craig Hogan, Brittany L. Kamai | Summary: Precision measurements are reported of the cross-spectrum of rotationally-induced differential position displacements in a pair of colocated 39 m long, high power Michelson interferometers. One arm of each interferometer is bent $90^{circ}$ […]

Continue..

Interferometric Constraints on Spacelike Coherent Rotational Fluctuations

Posted by December 13, 2020Chicago

Kavli Affiliate: Stephan S. Meyer | First 5 Authors: Jonathan W. Richardson, Ohkyung Kwon, H. Richard Gustafson, Craig Hogan, Brittany L. Kamai | Summary: Precision measurements are reported of the cross-spectrum of rotationally-induced differential position displacements in a pair of colocated 39 m long, high power Michelson interferometers. One arm of each interferometer is bent […]

Continue..