Kavli Affiliate: Susan Clark | Summary:We analyze the use of the Solovay Kitaev (SK) algorithm to generate an ensemble of one qubit rotations over which to perform randomized compilation. We perform simulations to compare the trace distance between the quantum state resulting from an ideal one qubit $R_Z$ rotation and discrete SK decompositions. We find […]
Kavli Affiliate: David Muller| First 5 Authors: Sophia Hager, Sophia Hager, , , | Summary:As large language models (LLMs) are increasingly used for factual question-answering, it becomes more important for LLMs to have the capability to communicate the likelihood that their answer is correct. For these verbalized expressions of uncertainty to be meaningful, they should […]
Kavli Affiliate: Jing Wang | First 5 Authors: NVIDIA, :, Johan Bjorck, Fernando Castañeda, Nikita Cherniadev | Summary: General-purpose robots need a versatile body and an intelligent mind. Recent advancements in humanoid robots have shown great promise as a hardware platform for building generalist autonomy in the human world. A robot foundation model, trained on […]
Kavli Affiliate: Paolo Privitera | Summary:We report on a search for sub-GeV dark matter (DM) particles interacting with electrons using the DAMIC-M prototype detector at the Modane Underground Laboratory. The data feature a significantly lower detector single $e^-$ rate (factor 50) compared to our previous search, while also accumulating a ten times larger exposure of […]
Kavli Affiliate: Tom Melia | Summary:We define a relativistic version of the global symmetries responsible for the restricted mobility of fracton quasiparticles. The theories have a symmetry current that is proportional to a vector field that spontaneously breaks Lorentz boost symmetry. We argue that the existence of a pressureless dust in the early universe could […]
Kavli Affiliate: Katja C. Nowack | Summary:We use scanning superconducting quantum interference device (SQUID) microscopy to image individual vortices in superconducting strips fabricated from NbTiN thin films. By repeatedly field-cooling strips of different widths in applied magnetic fields, we extract the threshold field at which the first vortex enters a strip, as well as the […]
Kavli Affiliate: Katja C. Nowack | Summary:We use scanning superconducting quantum interference device (SQUID) microscopy to image vortices in superconducting strips fabricated from NbTiN thin films. We repeatedly cool superconducting strips with different width in an applied magnetic field and image the individual vortices. From these images we determine the threshold field at which the […]
Kavli Affiliate: Kent Irwin | Summary:We use new cosmic microwave background (CMB) primary temperature and polarization anisotropy measurements from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) to test foundational assumptions of the standard cosmological model and set constraints on extensions to it. We derive constraints from the ACT DR6 power spectra alone, as […]
Kavli Affiliate: Kent Irwin | First 5 Authors: Erminia Calabrese, J. Colin Hill, Hidde T. Jense, Adrien La Posta, Irene Abril-Cabezas | Summary: We use new cosmic microwave background (CMB) primary temperature and polarization anisotropy measurements from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) to test foundational assumptions of the standard cosmological model […]