Tootfinder

Reconfigurable Ultrafast Thermal Metamaterial Pixel Arrays by Dual-Gate Graphene Transistors
Yibai Zhong, Xiu Liu, Zexiao Wang, Tianyi Huang, Jingyi Zou, Sen Lin, Xiao Luo, Zhuo Li, Rui Cheng, Xu Zhang, Sheng Shen
https://arxiv.org/abs/2506.04372

Reconfigurable Ultrafast Thermal Metamaterial Pixel Arrays by Dual-Gate Graphene Transistors
Thermal signatures represent ubiquitous infrared appearances of objects, carrying their unique spectral fingerprints. Despite extensive efforts to decipher and manipulate thermal-infrared signals, the ability to fully control them across spatial, temporal and spectral domains remains a significant challenge due to the slow speed, diffuse and broadband emitting nature of thermal emission in most materials. Here, we demonstrate a reconfigurable ultrafast thermal metamaterial pixel array that inte…

Gate-tunable spectrum and charge dispersion mitigation in a graphene superconducting qubit
Nicolas Aparicio, Simon Messelot, Edgar Bonet-Orozco, Eric Eyraud, Kenji Watanabe, Takashi Taniguchi, Johann Coraux, Julien Renard
https://arxiv.org/abs/2506.04959

Gate-tunable spectrum and charge dispersion mitigation in a graphene superconducting qubit
Controlling the energy spectrum of quantum-coherent superconducting circuits, i.e. the energies of excited states, the circuit anharmonicity and the states' charge dispersion, is essential for designing performant qubits. This control is usually achieved by adjusting the circuit's geometry. In-situ control is traditionally obtained via an external magnetic field, in the case of tunnel Josephson junctions. More recently, semiconductor-weak-links-based Josephson junctions have emerged as an alter…

🇺🇦 #NowPlaying on KEXP's #PositiveVibrations
Max Romeo:
🎵 Open the Iron Gate
#MaxRomeo
https://vprecordsofficial.bandcamp.com/track/open-the-iron-gate

50 years ago today, mickey hart & zakir hussain & the diga rhythm band with #JerryGarcia in golden gate park, playing an early version of a dead classic while opening for the jefferson starship. 3rd of 3 diga shows, following 2 at winterland, hart’s 2nd ever extra-dead gigs, after 1973’s experiment in quad sound, last until ’81. from stage mikes, i think:

This https://arxiv.org/abs/2505.17662 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csLG_…

Automating Versatile Time-Series Analysis with Tiny Transformers on Embedded FPGAs
Transformer-based models have shown strong performance across diverse time-series tasks, but their deployment on resource-constrained devices remains challenging due to high memory and computational demand. While prior work targeting Microcontroller Units (MCUs) has explored hardware-specific optimizations, such approaches are often task-specific and limited to 8-bit fixed-point precision. Field-Programmable Gate Arrays (FPGAs) offer greater flexibility, enabling fine-grained control over data …

This https://arxiv.org/abs/2407.02722 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Pulse Design of Baseband Flux Control for Adiabatic Controlled-Phase Gates in Superconducting Circuits
Despite progress towards achieving low error rates with superconducting qubits, error-prone two-qubit gates remain a bottleneck for realizing large-scale quantum computers. Therefore, a systematic framework to design high-fidelity gates becomes imperative. One type of two-qubit gate in superconducting qubits is the controlled-phase (CPHASE) gate, which utilizes a conditional interaction between higher energy levels of the qubits controlled by a baseband flux pulse on one of the qubits or a tuna…

This https://arxiv.org/abs/2408.07148 has been replaced.
initial toot: https://mastoxiv.page/@a…

Gate-defined Kondo lattices with valley-helical quantum dot arrays
Kondo physics and heavy-fermion behavior have been predicted and observed in moiré materials. The electric tunability of moiré materials allows an in-situ study of Kondo lattices' phase diagrams, which is not possible with their intermetallic counterparts. However, moiré platforms rely on twisting, which introduces twisting angle disorder and undesired buckling. Here we propose device layouts for one- and two-dimensional gate-defined superlattices in Bernal bilayer graphene where localized s…

I really dislike it when airport seating has electrical outlets in it that don’t work. They’ve got all these seats at the gate with regular and USB power outlets but none of them work. 😡🤬😡

This https://arxiv.org/abs/2505.05532 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Design and FPGA Implementation of WOMBAT: A Deep Neural Network Level-1 Trigger System for Jet Substructure Identification and Boosted $H\rightarrow b\bar{b}$ Tagging at the CMS Experiment
This thesis investigates the physics performance, trigger efficiency, and Field Programmable Gate Array (FPGA) implementation of machine learning (ML)-based algorithms for Lorentz-boosted $H\rightarrow b\bar{b}$ tagging within the CMS Level-1 Trigger (L1T) under Phase-1 conditions. The proposed algorithm, WOMBAT (Wide Object ML Boosted Algorithm Trigger), comprises a high-performance Master Model (W-MM) and a quantized, FPGA-synthesizable Apprentice Model (W-AM), benchmarked against the standar…

Optimal Haar random fermionic linear optics circuits
Paolo Braccia, N. L. Diaz, Martin Larocca, M. Cerezo, Diego Garc\'ia-Mart\'in
https://arxiv.org/abs/2505.24212

Optimal Haar random fermionic linear optics circuits
Sampling unitary Fermionic Linear Optics (FLO), or matchgate circuits, has become a fundamental tool in quantum information. Such capability enables a large number of applications ranging from randomized benchmarking of continuous gate sets, to fermionic classical shadows. In this work, we introduce optimal algorithms to sample over the non-particle-preserving (active) and particle-preserving (passive) FLO Haar measures. In particular, we provide appropriate distributions for the gates of $n$-q…

This afternoon I herded 30-50 feral sheep back into their field.
Having, started a zoom call with a colleague, I noticed said flock of sheep wandering down our road!
So I got a long stick from the garage, and proceeded to do my best "One man and his dog" impression (without the dog, obvs) It turned out that the gate to the field wasn't properly closed and the sheep had made a bid for freedom.

Det fikses i Rosenkrantz' gate! #Oslo

Static Communication Analysis for Hardware Design
Mads Rosendahl (Roskilde University), Maja H. Kirkeby (Roskilde University)
https://arxiv.org/abs/2505.20849

Static Communication Analysis for Hardware Design
Hardware acceleration of algorithms is an effective method for improving performance in high-demand computational tasks. However, developing hardware designs for such acceleration fundamentally differs from software development, as it requires a deep understanding of the highly parallel nature of the hardware architecture. In this paper, we present a framework for the static analysis of communication within datapath architectures designed for field-programmable gate arrays (FPGAs). Our framewor…

SLOW RIDE ALERT!
Thursday, March 20! -- NEW PARK, NEAT ART!
Meet at 5:30, Roll at 6 @ Dolores Park
Bike through GGP, Great Highway, to Clement Street Art Walk via Slow Streets

This https://arxiv.org/abs/2407.12714 has been replaced.
initial toot: https://mastoxiv.page/@a…

Pulsed Electroluminescence in a Dopant-free Gateable Semiconductor
We report on a stable form of pulsed electroluminescence in a dopant-free direct bandgap semiconductor heterostructure which we coin the tidal effect. Swapping an inducing gate voltage in an ambipolar field effect transistor allows incoming and outgoing carriers of opposite charge to meet and recombine radiatively. We develop a model to explain the carrier dynamics that underpins the frequency response of the pulsed electroluminescence intensity. Higher mobilities enable larger active emission …

This https://arxiv.org/abs/2408.07529 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Optimal number of stabilizer measurement rounds in an idling surface code patch
Logical qubits can be protected against environmental noise by encoding them into a highly entangled state of many physical qubits and actively intervening in the dynamics with stabilizer measurements. In this work, we numerically optimize the rate of these interventions: the number of stabilizer measurement rounds for a logical qubit encoded in a surface code patch and idling for a given time. We model the environmental noise on the circuit level, including gate errors, readout errors, amplitu…

Weak localization as probe of spin-orbit-induced spin-split bands in bilayer graphene proximity coupled to WSe$_2$
E. Icking, F. W\"ortche, A. W. Cummings, A. W\"ortche, K. Watanabe, T. Taniguchi, C. Volk, B. Beschoten, C. Stampfer
https://arxiv.org/abs/2505.24632

Weak localization as probe of spin-orbit-induced spin-split bands in bilayer graphene proximity coupled to WSe$_2$
Proximity coupling of bilayer graphene (BLG) to transition metal dichalcogenides (TMDs) offers a promising route to engineer gate-tunable spin-orbit coupling (SOC) while preserving BLG's exceptional electronic properties. This tunability arises from the layer-asymmetric electronic structure of gapped BLG, where SOC acts predominantly on the layer in contact with the TMD. Here, we present high-quality BLG/WSe$_2$ devices with a proximity-induced SOC gap and excellent electrostatic control. Opera…

SLOW RIDE ALERT!
Thursday, March 20! -- NEW PARK, NEAT ART!
Meet at 5:30, Roll at 6 @ Dolores Park
Bike through GGP, Great Highway, to Clement Street Art Walk via Slow Streets

St Mary's gate, Adams Building, Nottingham, September 2023
#photography #ukphotographer #nottingham #monochrome