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@azonenberg@ioc.exchange
2025-06-19 20:22:44

Initial simulation of Samtec ARC6 connector launch. No ground plane cutout so the diffpair impedance drops to about 65Ω at the connector so far.
That will have to change, of course, but I wanted a baseline for comparison.

TDR plot showing dip to 65Ω
3D EM current view of connector launch showing return current on layer 2 ground plane
@arXiv_condmatmtrlsci_bot@mastoxiv.page
2025-06-19 09:23:37

An efficient forgetting-aware fine-tuning framework for pretrained universal machine-learning interatomic potentials
Jisu Kim, Jiho Lee, Sangmin Oh, Yutack Park, Seungwoo Hwang, Seungwu Han, Sungwoo Kang, Youngho Kang
arxiv.org/abs/2506.15223

@arXiv_condmatquantgas_bot@mastoxiv.page
2025-06-18 09:31:03

Quantum simulation of fermionic non-Abelian lattice gauge theories in $(2 1)$D with built-in gauge protection
Gaia De Paciani, Lukas Homeier, Jad C. Halimeh, Monika Aidelsburger, Fabian Grusdt
arxiv.org/abs/2506.14747

@arXiv_csCY_bot@mastoxiv.page
2025-06-19 08:08:33

Hypothesis Testing for Quantifying LLM-Human Misalignment in Multiple Choice Settings
Harbin Hong, Sebastian Caldas, Liu Leqi
arxiv.org/abs/2506.14997

@arXiv_csNE_bot@mastoxiv.page
2025-06-19 08:27:19

Extending Spike-Timing Dependent Plasticity to Learning Synaptic Delays
Marissa Dominijanni, Alexander Ororbia, Kenneth W. Regan
arxiv.org/abs/2506.14984

@azonenberg@ioc.exchange
2025-06-19 08:03:47

Why is kicad using 30GB of RAM?
Closed and reopened my board and it's using much less, so something somewhere probably leaked.

htop screenshot showing 16 cores maxed out by an EM solver simulation and around 120 GB of RAM used by various things including kicad and sonnet
@arXiv_csCE_bot@mastoxiv.page
2025-06-18 13:34:23

Replaced article(s) found for cs.CE. arxiv.org/list/cs.CE/new
[1/1]:
A comparative analysis for different finite element types in strain-gradient elasticity simulatio...

@arXiv_quantph_bot@mastoxiv.page
2025-06-17 13:05:22

High-fidelity entanglement and coherent multi-qubit mapping in an atom array
Aruku Senoo, Alexander Baumg\"artner, Joanna W. Lis, Gaurav M. Vaidya, Zhongda Zeng, Giuliano Giudici, Hannes Pichler, Adam M. Kaufman
arxiv.org/abs/2506.13632

@imprs_solar@academiccloud.social
2025-06-17 12:21:18
Content warning:

Congratulations! Aswathi Krishnan Kutty, doctoral researcher of the IMPRS for Solar System Science, has won the 2025 AEF/DPG-EP prize for the best poster at the DPG Spring Conference in Göttingen. The picture below captures the moments at the conference when she convinced the jury with her poster presentation on “Simulation of sunspots in the chromosphere and further comparison of the results with observations”.

A young scientist at image center, in front of her poster to the right. She looks and points towards the poster. To her left, three men listen to her explaining.
@azonenberg@ioc.exchange
2025-06-17 20:19:08

First EM simulations on the switch logic board after sorting out some licensing issues with the new Sonnet version.
V19 is a lot faster than v18, it doubles the thread cap from 8 to 16 and also replaces the legacy SSE based matrix solver with an AVX-based version (geee, i wonder where they might have got that from...).
First test is the BGA launch for LC0_PHY0_LANE1_TX, a 5 Gbps QSGMII link but also representative of some of the 25G SERDES.
Return loss is better than -13 dB…

Sonnet S21 curve showing a small null at 18.6 GHz
Sonnet S11 curve showing better than -20 dB to 13.2 GHz, then up to about -13 at 18.4 GHz
Sonnet 3D current density view of a BGA escape showing generally well behaved return paths