2024 – Page 231 – Kavli Institute Pre-Print Publications

Flat silicon gradient index lens with 3-layer anti-reflection structures for millimeter and submillimeter wavelengths

Posted by dbos January 31, 2024February 12, 2024Caltech

Kavli Affiliate: Sunil Golwala | First 5 Authors: Fabien Defrance, Cecile Jung-Kubiak, John Gill, Sofia Rahiminejad, Ted Macioce | Summary: We present the design, fabrication, and test of a 100 mm diameter flat gradient-index (GRIN) lens fabricated with high-resistivity silicon and combined with three-layer anti-reflection (AR) structures optimized for 160 – 355 GHz. The anti-reflection […]

Continue..

STAR: An Efficient Softmax Engine for Attention Model with RRAM Crossbar

Posted by dbos January 31, 2024February 12, 2024Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Yifeng Zhai, Bing Li, Bonan Yan, Jing Wang, | Summary: RRAM crossbars have been studied to construct in-memory accelerators for neural network applications due to their in-situ computing capability. However, prior RRAM-based accelerators show efficiency degradation when executing the popular attention models. We observed that the frequent […]

Continue..

Hierarchical phased-array antennas coupled to Al KIDs: a scalable architecture for multi-band mm/submm focal planes

Posted by dbos January 31, 2024February 12, 2024Caltech

Kavli Affiliate: Sunil R. Golwala | First 5 Authors: Jean-Marc Martin, Junhan Kim, Fabien Defrance, Shibo Shu, Andrew D. Beyer | Summary: We present the optical characterization of two-scale hierarchical phased-array antenna kinetic inductance detectors (KIDs) for millimeter/submillimeter wavelengths. Our KIDs have a lumped-element architecture with parallel plate capacitors and aluminum inductors. The incoming light […]

Continue..

A universal pairing gap measurement proposal by dynamical excitations in 2D doped attractive Fermi-Hubbard model with spin-orbit coupling

Posted by dbos January 30, 2024Peking

Kavli Affiliate: Feng Yuan | First 5 Authors: Huaisong Zhao, Rui Han, Ling Qin, Feng Yuan, Peng Zou | Summary: By calculating dynamical structure factor of two-dimensional doped attractive Fermi-Hubbard model with Rashba spin-orbit coupling, we not only investigate collective modes and single-particle excitations of the system during the phase transition between Bardeen-Cooper-Schrieffer superfluid and […]

Continue..

Polarization properties of 128 non-repeating fast radio bursts from the first CHIME/FRB baseband catalog

Posted by dbos January 30, 2024MIT

Kavli Affiliate: Kiyoshi W. Masui | First 5 Authors: Ayush Pandhi, Ziggy Pleunis, Ryan Mckinven, B. M. Gaensler, Jianing Su | Summary: We present a 400-800 MHz polarimetric analysis of 128 non-repeating fast radio bursts (FRBs) from the first CHIME/FRB baseband catalog, increasing the total number of FRB sources with polarization properties by a factor […]

Continue..

Polarization properties of the 128 non-repeating fast radio bursts from the first CHIME/FRB baseband catalog

Posted by dbos January 30, 2024February 12, 2024MIT

Continue..

Spike transmission failures in axons from mouse cortical pyramidal neurons in vivo

Posted by dbos January 30, 2024February 12, 2024Columbia

Kavli Affiliate: Rafael Yuste | Authors: Netanel Ofer, Victor Hugo Cornejo and Rafael Yuste | Summary: Abstract The propagation of action potentials along axons is traditionally considered to be reliable, as a consequence of the high safety factor of action potential propagation. However, numerical simulations have suggested that, at high frequencies, spikes could fail to […]

Continue..

Aberrant hippocampal Ca2+ micro-waves following synapsin-dependent adeno-associated viral expression of Ca2+ indicators

Posted by dbos January 30, 2024February 12, 2024Columbia

Kavli Affiliate: Rafael Yuste | Authors: Nicola Masala, Manuel Mittag, Eleonora Ambrad Giovannetti, Darik A O’Neil, Fabian J Distler, Peter Rupprecht, Fritjof Helmchen, Rafael Yuste, Martin Fuhrmann, Heinz Beck, Michael Wenzel and Tony Kelly | Summary: Abstract Genetically encoded calcium indicators (GECIs) such as GCaMP are invaluable tools in neuroscience to monitor neuronal activity using […]

Continue..

Ptycho-endoscopy on a lensless ultrathin fiber bundle tip

Posted by dbos January 30, 2024Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Pengming Song, Ruihai Wang, Lars Loetgering, Jia Liu, Peter Vouras | Summary: Synthetic aperture radar (SAR) utilizes an aircraft-carried antenna to emit electromagnetic pulses and detect the returning echoes. As the aircraft travels across a designated area, it synthesizes a large virtual aperture to improve image resolution. […]

Continue..

Ptycho-endoscopy on a lensless ultrathin fiber bundle tip

Posted by dbos January 30, 2024February 12, 2024Caltech

Kavli Affiliate: Changhuei Yang | First 5 Authors: Pengming Song, Ruihai Wang, Lars Loetgering, Jia Liu, Peter Vouras | Summary: Synthetic aperture radar (SAR) utilizes an aircraft-carried antenna to emit electromagnetic pulses and detect the returning echoes. As the aircraft travels across a designated area, it synthesizes a large virtual aperture to improve image resolution. […]

Continue..