December 2, 2021 – Kavli Institute Pre-Print Publications

Optimizing frequency allocation for fixed-frequency superconducting quantum processors

Posted by klaurent December 2, 2021Berkeley

Kavli Affiliate: Irfan Siddiqi | First 5 Authors: Alexis Morvan, Larry Chen, Jeffrey M. Larson, David I. Santiago, Irfan Siddiqi | Summary: Fixed-frequency superconducting quantum processors are one of the most mature quantum computing architectures with high-coherence qubits and low-complexity controls. However, high-fidelity multi-qubit gates pose tight requirements on individual qubit frequencies in these processors […]

Continue..

Neutral Gas within 20,000 Schwarzschild radii of Sagittarius A*

Posted by dbos December 2, 2021Stanford

Kavli Affiliate: Roger D. Blandford | First 5 Authors: Elena M. Murchikova, Tianshu Wang, Brian Mason, Roger D. Blandford, | Summary: Murchikova et al 2019 discovered a disk of cool ionized gas within 20,000 Schwarzschild radii of the Milky Way’s Galactic Center black hole Sagittarius A*. They further demonstrated that the ionizing photon flux in […]

Continue..

Extending the SAGA Survey (xSAGA) I: Satellite Radial Profiles as a Function of Host Galaxy Properties

Posted by klaurent December 2, 2021Stanford

Kavli Affiliate: Risa H. Wechsler | First 5 Authors: John F. Wu, J. E. G. Peek, Erik J. Tollerud, Yao-Yuan Mao, Ethan O. Nadler | Summary: We present "Extending the Satellites Around Galactic Analogs Survey" (xSAGA), a method for identifying low-$z$ galaxies on the basis of optical imaging, and results on the spatial distributions of […]

Continue..

The Pantheon+ Analysis: Improving the Redshifts and Peculiar Velocities of Type Ia Supernovae Used in Cosmological Analyses

Posted by December 2, 2021Chicago

Kavli Affiliate: Richard Kessler | First 5 Authors: Anthony Carr, Tamara M. Davis, Daniel Scolnic, Khaled Said, Dillon Brout | Summary: We examine the redshifts of a comprehensive set of published Type Ia supernovae, and provide a combined, improved catalog with updated redshifts. We improve on the original catalogs by using the most up-to-date heliocentric […]

Continue..

GJ 367b: A dense ultra-short period sub-Earth planet transiting a nearby red dwarf star

Posted by klaurent December 2, 2021MIT

Kavli Affiliate: Edward H. Morgan | First 5 Authors: Kristine W. F. Lam, Szilárd Csizmadia, Nicola Astudillo-Defru, Xavier Bonfils, Davide Gandolfi | Summary: Ultra-short-period (USP) exoplanets have orbital periods shorter than one day. Precise masses and radii of USPs could provide constraints on their unknown formation and evolution processes. We report the detection and characterization […]

Continue..

GJ 367b: A dense ultra-short period sub-Earth planet transiting a nearby red dwarf star

Posted by klaurent December 2, 2021MIT

Kavli Affiliate: George R. Ricker | First 5 Authors: Kristine W. F. Lam, Szilárd Csizmadia, Nicola Astudillo-Defru, Xavier Bonfils, Davide Gandolfi | Summary: Ultra-short-period (USP) exoplanets have orbital periods shorter than one day. Precise masses and radii of USPs could provide constraints on their unknown formation and evolution processes. We report the detection and characterization […]

Continue..

The Imaging X-Ray Polarimetry Explorer (IXPE): Pre-Launch

Posted by klaurent December 2, 2021MIT

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Martin C. Weisskopf, Paolo Soffitta, Luca Baldini, Brian D. Ramsey, Stephen L. O’Dell | Summary: Scheduled to launch in late 2021, the Imaging X-ray Polarimetry Explorer (IXPE) is a NASA Small Explorer Mission in collaboration with the Italian Space Agency (ASI). The mission will open a […]

Continue..