Tootfinder

Detection and manipulation of surface electric field noise of hexagonal boron nitride
Hao-Jie Zhou, Xiao-Wen Shen, Yu Zhou, Lei Dong, Pei-Qin Chen, Xia Chen, Guang-Wei Deng, Gang Xiang, Pei-Jie Guo, Tian-Ke Wang, Hong-Peng Wu, Jun-Feng Wang
https://arxiv.org/abs/2506.07734

Detection and manipulation of surface electric field noise of hexagonal boron nitride
Hexagonal boron nitride (hBN) spin defects off er transformative potential for quantum sensing through atomic-scale proximity to target samples, yet their performance is fundamentally limited by rapid coherence loss. While magnetic noise mechanisms have been extensively studied, another critical infl uence from surface electric fi eld noise remains unexplored in hBN systems. Here,we address this challenge and systematically investigate surface electric fi eld noise in hBN using shallow boron va…

Magnon-polaron control in a surface magnetoacoustic wave resonator
Kevin K\"unstle, Yannik Kunz, Tarek Moussa, Katharina Lasinger, Kei Yamamoto, Philipp Pirro, John F. Gregg, Akashdeep Kamra, Mathias Weiler
https://arxiv.org/abs/2506.09717

Magnon-polaron control in a surface magnetoacoustic wave resonator
Strong coupling between distinct quasiparticles in condensed matter systems gives rise to hybrid states with emergent properties. We demonstrate the hybridization of confined phonons and finite-wavelength magnons, forming a magnon-polaron cavity with tunable coupling strength and spatial confinement controlled by the applied magnetic field direction. Our platform consists of a low-loss, single-crystalline yttrium iron garnet (YIG) film coupled to a zinc oxide (ZnO)-based surface acoustic wave (…

Towards Biosignals-Free Autonomous Prosthetic Hand Control via Imitation Learning
Kaijie Shi, Wanglong Lu, Hanli Zhao, Vinicius Prado da Fonseca, Ting Zou, Xianta Jiang
https://arxiv.org/abs/2506.08795

Towards Biosignals-Free Autonomous Prosthetic Hand Control via Imitation Learning
Limb loss affects millions globally, impairing physical function and reducing quality of life. Most traditional surface electromyographic (sEMG) and semi-autonomous methods require users to generate myoelectric signals for each control, imposing physically and mentally taxing demands. This study aims to develop a fully autonomous control system that enables a prosthetic hand to automatically grasp and release objects of various shapes using only a camera attached to the wrist. By placing the ha…

Broadband Low-loss Unidirectional Reflection On-chip with Asymmetric Dielectric Metasurface
Heijun Jeong, Zeki Hayran, Yuan Liu, Yahui Xiao, Hwaseob Lee, Zi Wang, Jonathan Klamkin, Francesco Monticone, Tingyi Gu
https://arxiv.org/abs/2506.06872

Broadband Low-loss Unidirectional Reflection On-chip with Asymmetric Dielectric Metasurface
Metasurface has emerged as a powerful platform for controlling light at subwavelength thickness, enabling new functionalities for imaging, polarization manipulation, and angular momentum conversion within a flat surface. We explored an integrated asymmetric metasurface simultaneously achieving broadband, low loss forward power transmission, and significant back reflection sup-pression in multi-mode waveguides. The tapering along the direction of light propagation leads to low loss and space-eff…

The rate of descent did not slow as much as expected,
and the spacecraft probably made a hard landing.
The laser instrument that measured how high Resilience was above the surface was slow in making its measurements,
which may have contributed to the problem.
“At this point, we do not know clearly about the cause,”
Takeshi Hakamada, the chief executive of Ispace, said in translated remarks.
The loss of the second mission could lead NASA to rethink its pla…

Ispace of Japan’s Moon Lander Resilience Has Crashed
The loss of the Resilience spacecraft by Ispace repeated a crash into the moon in 2023 of the company’s first robotic lunar landing mission.

Spin-orbit interaction, band topology, and spin texture in BiInO3(001) surface
Ramsamoj Kewat, Nirmal Ganguli
https://arxiv.org/abs/2506.21438 https://

Spin-orbit interaction, band topology, and spin texture in BiInO3(001) surface
This research investigates the implication of spin-orbit interaction (SOI) and symmetry on the band topology and spin texture at the (001) surface of BiInO$_3$. Using density functional theory (DFT) and symmetry analysis, the study explores the impact of surface termination on the electronic structure, particularly focusing on how the loss of translational symmetry at the surface influences the band topology of the surface states. Key findings include discovering two dangling surface states (na…

Atomic-scale mapping of interfacial phonon modes in epitaxial YBa2Cu3O7-{\delta} / (La,Sr)(Al,Ta)O3 thin films: The role of surface phonons
Joaquin E. Reyes Gonzalez, Charles Zhang, Rainni K. Chen, John Y. T. Wei, Maureen J. Lagos
https://arxiv.org/abs/2506.02237

Atomic-scale mapping of interfacial phonon modes in epitaxial YBa2Cu3O7-δ / (La,Sr)(Al,Ta)O3 thin films: The role of surface phonons
We investigate the behavior of phonons at the epitaxial interface between YBa2Cu3O7-δ thin film and (La,Sr)(Al,Ta)O3 substrate using vibrational electron energy loss spectroscopy. Interfacial phonon modes with different degrees of scattering localization were identified. We find evidence that surface contributions from the surrounding environment can impose additional scattering modulation into local EELS measurements at the interface. A method to remove those contributions is then used to iso…

Residual 1D CNN for Low SFR Surface Density Regression: A Design Note
Po-Chieh Yu
#toXiv_bot_toot

ASTARS empowered Satellite Positioning Approach for Urban Canyons and Indoor Environments
Yu Zhang, Xin Sun, Tianwei Hou, Anna Li, Sofie Pollin, Yuanwei Liu, Arumugam Nallanathan
https://arxiv.org/abs/2507.01783

ASTARS empowered Satellite Positioning Approach for Urban Canyons and Indoor Environments
To mitigate the loss of satellite navigation signals in urban canyons and indoor environments, we propose an active simultaneous transmitting and reflecting reconfigurable intelligent surface (ASTARS) empowered satellite positioning approach. Deployed on building structures, ASTARS reflects navigation signals to outdoor receivers in urban canyons and transmits signals indoors to bypass obstructions, providing high-precision positioning services to receivers in non-line-of-sight (NLoS) areas. Th…

Full-body WPT: wireless powering with meandered e-textiles
Ryo Takahashi, Takashi Sato, Wakako Yukita, Tomoyuki Yokota, Takao Someya, Yoshihiro Kawahara
https://arxiv.org/abs/2506.17606

Full-body WPT: wireless powering with meandered e-textiles
We present Full-body WPT, wireless power networking around the human body using a meandered textile coil. Unlike traditional inductive systems that emit strong fields into the deep tissue inside the body, the meander coil enables localized generation of strong magnetic field constrained to the skin surface, even when scaled to the size of the human body. Such localized inductive system enhances both safety and efficiency of wireless power around the body. Furthermore, the use of low-loss conduc…

Gefitinib-Induced Interface Engineering Enhances the Defect Formation Energy for Highly Efficient and Stable Perovskite Solar Cells
Xianhu Wu, Guanglei Cui, Jieyu Bi, Gaojie Xia, Zewen Zuo, Min Gu
https://arxiv.org/abs/2506.03611

Gefitinib-Induced Interface Engineering Enhances the Defect Formation Energy for Highly Efficient and Stable Perovskite Solar Cells
Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) has been widely used as a hole transport layer in perovskite solar cells (PSCs). However, the high interface defect density and energy level mismatch between PEDOT:PSS and perovskite can lead to significant open-circuit voltage loss. Additionally, the free PSS chains on the surface of PEDOT:PSS can absorb water molecules, promoting the degradation of perovskite at the PEDOT:PSS/perovskite interface. Here, gefitinib is used to mod…

Comparison of spin-qubit architectures for quantum error-correcting codes
Mauricio Guti\'errez, Juan S. Rojas-Arias, David Obando, Chien-Yuan Chang
https://arxiv.org/abs/2506.17190

Comparison of spin-qubit architectures for quantum error-correcting codes
We investigate the performance of two quantum error-correcting codes, the surface code and the Bacon-Shor code, for implementation with spin qubits in silicon. In each case, we construct a logical qubit using a planar array of quantum dots, exploring two encoding schemes: one based solely on single-electron Zeeman qubits (Loss-DiVincenzo qubits), and a hybrid approach combining Zeeman and singlet-triplet qubits. For both codes, we evaluate key performance metrics, including logical state prepar…

Improving the lifetime of aluminum-based superconducting qubits through atomic layer etching and deposition
Neha Mahuli (AWS Center for Quantum Computing, Pasadena, CA, USA), Joaquin Minguzzi (AWS Center for Quantum Computing, Pasadena, CA, USA), Jiansong Gao (AWS Center for Quantum Computing, Pasadena, CA, USA), Rachel Resnick (Google Research), Sandra Diez (National Institute of Standards and Technology), Cosmic Raj (AWS Center for Quantum Computing, Pasadena, CA, USA), Guillaume Mar…

Improving the lifetime of aluminum-based superconducting qubits through atomic layer etching and deposition
We present a dry surface treatment combining atomic layer etching and deposition (ALE and ALD) to mitigate dielectric loss in fully fabricated superconducting quantum devices formed from aluminum thin films on silicon. The treatment, performed as a final processing step prior to device packaging, starts by conformally removing the native metal oxide and fabrication residues from the exposed surfaces through ALE before \textit{in situ} encapsulating the metal surfaces with a thin dielectric laye…

Ultrafast electron dynamics upon above band-gap excitation in epitaxial LaFeO$_3$(001) thin films
Friederike Elisa W\"uhrl, Antonia Rieche, Anne Oelschl\"ager, Kathrin D\"orr, Wolf Widdra
https://arxiv.org/abs/2505.24809

Ultrafast electron dynamics upon above band-gap excitation in epitaxial LaFeO$_3$(001) thin films
Strong electron correlations in perovskite oxides give rise to rich and often unexpected electronic phenomena. In this study, we present a comprehensive surface-science investigation of epitaxial thin films of the charge-transfer insulator LaFeO$_3$(001). The characterization includes low-energy electron diffraction (LEED), high-resolution electron energy loss spectroscopy (HREELS), and photoemission spectroscopy. We map both the occupied and unoccupied electronic states using two-photon photoe…