Tootfinder

Astronomers detect sudden awakening of black hole 1m times mass of sun
The mysterious brightening of a galaxy far, far away has been traced to the heart of the star system
and the sudden awakening of a giant black hole 1m times more massive than the sun.
Decades of observations found nothing remarkable about the distant galaxy in the constellation of Virgo,
but that changed at the end of 2019 when astronomers noticed a dramatic surge in its luminosity that persists t…

Pseudogap with Fermi arcs and Fermi pockets in half-filled twisted transition metal dichalcogenides
Yong-Yue Zong, Zhao-Long Gu, Jian-Xin Li
https://arxiv.org/abs/2406.11374 https://arxiv.org/pdf/2406.11374
arXiv:2406.11374v1 Announce Type: new
Abstract: Twisted transition metal dichalcogenides are a new platform for realizing strongly correlated physics with high tunability. Recent transport experiments have reported the realization of a Mott insulator, its bandwidth-driven evolution to a metal, and the strange metal behavior in proximity to the transition via the tuning of a displacement field in twisted $\mathrm{WSe_2}$($\mathrm{tWSe_2}$) fixed at half filling. However, the nature of the correlated states and the related Mott physics involved in the whole process remain to be determined. Here, we unveil theoretically the evolution of the ground state of the half-filled $\boldsymbol{\mathrm{moir\acute{e}}}$ Hubbard model as applied to $\mathrm{tWSe_2}$, transiting from a pseudogap state with Fermi arcs to a 120$^\circ$ Ne$\boldsymbol{\acute{\mathrm{e}}}$l ordered Mott insulator, then to another pseudogap state with Fermi pockets, and eventually to a Fermi liquid via a Lifshitz transition. The pseudogap phases are definitively identified by the vanishing of quasiparticle weights over an extended region of the free Fermi surface, with the remaining parts forming disconnected Fermi arcs or pockets that contain well-defined quasiparticles. The loss of quasiparticle weights in the pseudogap phases indicates the breakdown of Landau's Fermi liquid theory. We demonstrate that the emergence of the Fermi arcs/pockets results from the electronic structure reconstruction driven by strong electron correlations, marked by the existence of Luttinger surface enclosed by the zeros of single-particle Green's function. This work reveals the fundamental aspects of the Mottness in $\boldsymbol{\mathrm{moir\acute{e}}}$ systems and will stimulate the advance of the direct probes of the Fermi surface and quasiparticles beyond transports, such as angle-resolved photoemission spectroscopy (ARPES) and scanning tunnelling microscopy (STM) experiments.

Cowboys named best fit to sign one of the UFL's best players and it's so easy to get on board with the idea https://www.yardbarker.com/nfl/articles/cowboys_named_b…

I honestly can’t read this without hearing the pulsejet of a V-1 flying bomb in my head, farting its way across the sky. 😂 https://thefolklore.cafe/@juergen_hubert/112633499406369052

Jürgen Hubert (@juergen_hubert@thefolklore.cafe)
Attached: 1 image The lindwurm dragons of the Baltic Sea coast not only spit fire - they fart fire, too! #MythologyMonday #Germany #folktale #folklore #dragon https://www.patreon.com/posts/lives-of-67979248

The subgroup structure of pseudo-reductive groups
Michael Bate, Ben Martin, Gerhard R\"ohrle, Damian Sercombe
https://arxiv.org/abs/2406.11286 https:/…

The subgroup structure of pseudo-reductive groups
Let $k$ be a field. We investigate the relationship between subgroups of a pseudo-reductive $k$-group $G$ and its maximal reductive quotient $G'$, with applications to the subgroup structure of $G$. Let $k'/k$ be the minimal field of definition for the geometric unipotent radical of $G$, and let $π':G_{k'} \to G'$ be the quotient map. We first characterise those smooth subgroups $H$ of $G$ for which $π'(H_{k'})=G'$. We next consider the following questions: given a subgroup $H'$ of $G'$, does…

Pseudogap with Fermi arcs and Fermi pockets in half-filled twisted transition metal dichalcogenides
Yong-Yue Zong, Zhao-Long Gu, Jian-Xin Li
https://arxiv.org/abs/2406.11374 https://arxiv.org/pdf/2406.11374
arXiv:2406.11374v1 Announce Type: new
Abstract: Twisted transition metal dichalcogenides are a new platform for realizing strongly correlated physics with high tunability. Recent transport experiments have reported the realization of a Mott insulator, its bandwidth-driven evolution to a metal, and the strange metal behavior in proximity to the transition via the tuning of a displacement field in twisted $\mathrm{WSe_2}$($\mathrm{tWSe_2}$) fixed at half filling. However, the nature of the correlated states and the related Mott physics involved in the whole process remain to be determined. Here, we unveil theoretically the evolution of the ground state of the half-filled $\boldsymbol{\mathrm{moir\acute{e}}}$ Hubbard model as applied to $\mathrm{tWSe_2}$, transiting from a pseudogap state with Fermi arcs to a 120$^\circ$ Ne$\boldsymbol{\acute{\mathrm{e}}}$l ordered Mott insulator, then to another pseudogap state with Fermi pockets, and eventually to a Fermi liquid via a Lifshitz transition. The pseudogap phases are definitively identified by the vanishing of quasiparticle weights over an extended region of the free Fermi surface, with the remaining parts forming disconnected Fermi arcs or pockets that contain well-defined quasiparticles. The loss of quasiparticle weights in the pseudogap phases indicates the breakdown of Landau's Fermi liquid theory. We demonstrate that the emergence of the Fermi arcs/pockets results from the electronic structure reconstruction driven by strong electron correlations, marked by the existence of Luttinger surface enclosed by the zeros of single-particle Green's function. This work reveals the fundamental aspects of the Mottness in $\boldsymbol{\mathrm{moir\acute{e}}}$ systems and will stimulate the advance of the direct probes of the Fermi surface and quasiparticles beyond transports, such as angle-resolved photoemission spectroscopy (ARPES) and scanning tunnelling microscopy (STM) experiments.

This https://arxiv.org/abs/2406.05281 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csRO_…

Lessons from the Cruise Robotaxi Pedestrian Dragging Mishap
A robotaxi dragged a pedestrian 20 feet down a San Francisco street on the evening of October 2, 2023, coming to rest with its rear wheel on that woman's legs. The mishap was complex, involving a first impact by a different, human-driven vehicle. The following weeks saw Cruise stand down its road operations amid allegations of withholding crucial mishap information from regulators. The pedestrian has survived her severe injuries, but the robotaxi industry is still wrestling with the aftermath. …

Cowboys to sign UFL's leading tackler after finding gems in previous spring league players, per report

https://www.cbssports.com/nfl/news/cowboys…

Cowboys to sign UFL's leading tackler after finding gems in previous spring league players, per report
Dallas continues to seek out depth for its inside linebacker room following the retirement of Leighton Vander Esch

Cowboys to sign UFL's leading tackler after finding gems in previous spring league players, per report

https://www.cbssports.com/nfl/news/cowboys…

Cowboys to sign UFL's leading tackler after finding gems in previous spring league players, per report
Dallas continues to seek out depth for its inside linebacker room following the retirement of Leighton Vander Esch