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Valley-locked Optical Spin Merons in Valley Photonic Crystal Waveguides
arXiv:2605.02676v4 Announce Type: replace Abstract: Optical skyrmionic textures, including N\'eel-type skyrmions and merons, have attracted significant attention across diverse physical systems for their promising applications in ultra-precise metrology, optical information processing, and quantum technologies. However, the lack of an effective approach for their on-chip directional transport and manipulation impedes their applications in photonic integrated devices. Here, we numerically...
Sharp periodic Ge concentration modulations beyond the conduction band valley wavevector $k_0$ in nuclear spin-free Si quantum wells
new Abstract: Periodic Ge modulations within strained Si quantum wells in SiGe heterostructures offer a route to deterministically enhance conduction-band valley splitting in Si, a key requirement for scalable spin-qubit quantum computing. Efficient enhancement requires modulations in the order of the Si valley wavevector $k_0$ (9.7 nm$^{-1}$), corresponding to a period of 0.64 nm and near-monolayer growth control. Using nuclear-spin-free molecular beam epitaxy with $^{28}$Si and $^{72}$Ge,...
Silicon Valley including Meta has embraced Maga politics, says Nick Clegg
Meta’s former head of global affairs says executives pivoted right in some cases for ‘rather more self-interested’ reasonsSilicon Valley companies including Meta have decided to embrace Maga politics, some for “rather more self-interested” reasons, the former UK deputy prime minister Nick Clegg has said. Clegg, who spent nearly seven years at Meta as the head of global affairs, told The Rest is Money podcast that it felt like “a very good time for me to move on” when he left the company in...
Silicon Valley including Meta has embraced Maga politics, says Nick Clegg
Meta’s former head of global affairs says executives pivoted right in some cases for ‘rather more self-interested’ reasonsSilicon Valley companies including Meta have decided to embrace Maga politics, some for “rather more self-interested” reasons, the former UK deputy prime minister Nick Clegg has said. Clegg, who spent nearly seven years at Meta as the head of global affairs, told The Rest is Money podcast that it felt like “a very good time for me to move on” when he left the company in...
Tracing Stablecoin Contagion during the USDC Depeg after the Silicon Valley Bank Collapse
new Abstract: The March 2023 collapse of Silicon Valley Bank (SVB) disrupted the core premise of stablecoins, which are digital tokens designed to maintain a fixed value against the U.S. dollar and serve as on-chain substitutes for dollar liquidity. The event triggered a sharp depeg of USDC, creating a rare exogenous shock to the stablecoin ecosystem. While price deviations during this crisis are well documented, the underlying behavioral reorganization of on-chain activity remains less...
Aerial footage shows California brush fire spreading across Simi Valley – video
A fast-growing brush fire, named the Sandy fire, began in Simi Valley, southern California, on Monday morning. The blaze quickly expanded to over 1,300 acres and has resulted in evacuation orders for thousands of residents, with at least one home damaged.
Silicon Valley including Meta has embraced Maga politics, says Nick Clegg
Meta’s former head of global affairs says executives pivoted right in some cases for ‘rather more self-interested’ reasonsSilicon Valley companies including Meta have decided to embrace Maga politics, some for “rather more self-interested” reasons, the former UK deputy prime minister Nick Clegg has said. Clegg, who spent nearly seven years at Meta as the head of global affairs, told The Rest is Money podcast that it felt like “a very good time for me to move on” when he left the company in...
Persistent circulation of Rift Valley fever virus lineage C in Rwanda, 2022-2025
Rwanda has experienced recurrent Rift Valley fever virus outbreaks in the last decade. In this study, we investigated whether these outbreaks resulted from repeated introductions or sustained local circulation. We generated RVFV whole-genome sequences from livestock samples collected between 2022 and 2025 using Nanopore sequencing.
The Vatican Takes on Silicon Valley With an A.I. Warning
Pope Leo XIV’s first encyclical takes aim at artificial intelligence and Silicon Valley’s lock on the technology.
Silicon Valley including Meta has embraced Maga politics, says Nick Clegg
Meta’s former head of global affairs says executives pivoted right in some cases for ‘rather more self-interested’ reasonsSilicon Valley companies including Meta have decided to embrace Maga politics, some for “rather more self-interested” reasons, the former UK deputy prime minister Nick Clegg has said. Clegg, who spent nearly seven years at Meta as the head of global affairs, told The Rest is Money podcast that it felt like “a very good time for me to move on” when he left the company in...