Optical Fiber-Waveguide Hybrid Architecture for Mid-Infrared Ring Lasers

Kavli Affiliate: Long Zhang | First 5 Authors: Tinghui An, Tinghui An, , , | Summary: We report a mid-infrared ring laser via fiber-to-waveguide hybrid integration enabled by directional couplers fabricated in fluoride glasses. Directional couplers were inscribed into fluoride glass using femtosecond laser direct writing, forming low-loss waveguides with a high positive refractive index […]


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Visible Yet Unreadable: A Systematic Blind Spot of Vision Language Models Across Writing Systems

Kavli Affiliate: Ting Xu | First 5 Authors: Jie Zhang, Jie Zhang, , , | Summary: Writing is a universal cultural technology that reuses vision for symbolic communication. Humans display striking resilience: we readily recognize words even when characters are fragmented, fused, or partially occluded. This paper investigates whether advanced vision language models (VLMs) share […]


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Integrated photonic ultrawideband real-time spectrum sensing for 6G wireless networks

Kavli Affiliate: Feng Yuan | First 5 Authors: Yuansheng Tao, Yuansheng Tao, , , | Summary: The sixth generation (6G) wireless networks require dynamic spectrum management to optimize the utilization of scarce spectral resources and support emerging integrated sensing and communication (ISAC) applications. This necessitates real-time spectrum sensing (RT-SS) capability with ultrawide measurement range, compact […]


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The Spin-orbit alignment of two short period eclipsing binary systems

Kavli Affiliate: Avi Shporer | First 5 Authors: Tony Wells, Tony Wells, , , | Summary: We present a joint analysis of TESS photometry and radial velocity measurements obtained from the Minerva-Australis facility for two short-period eclipsing binaries, TIC 48227288 and TIC 339607421. TIC 339607421 hosts an M-dwarf companion ($M_B = 0.294 pm 0.013 : […]


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Search for low-mass electron-recoil dark matter using a single-charge sensitive SuperCDMS-HVeV Detector

Kavli Affiliate: D. B. Macfarlane | First 5 Authors: SuperCDMS Collaboration, SuperCDMS Collaboration, , , | Summary: We present constraints on low mass dark matter-electron scattering and absorption interactions using a SuperCDMS high-voltage eV-resolution (HVeV) detector. Data were taken underground in the NEXUS facility located at Fermilab with an overburden of 225 meters of water […]


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The clustering of C IV and Si IV at the end of reionisation: A perspective from the E-XQR-30 survey

Kavli Affiliate: Martin Haehnelt | First 5 Authors: Louise Welsh, Louise Welsh, , , | Summary: We aim to study the clustering of metal absorption lines and the structures that they arise in as a function of cosmic time. We focus on C IV and Si IV absorption features that are identified along a given […]


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Role of Fe intercalation on the electronic correlation in resistively switchable antiferromagnet Fe$_x$NbS$_2$

Kavli Affiliate: Jeffrey B. Neaton | First 5 Authors: Wenxin Li, Wenxin Li, , , | Summary: Among the family of intercalated transition-metal dichalcogenides (TMDs), Fe$_x$NbS$_2$ is found to possess unique current-induced resistive switching behaviors, tunable antiferromagnetic states, and a commensurate charge order, all of which are tied to a critical Fe doping of $x_c$ […]


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Deconfined Quantum Critical Point in Quantum Hall Bilayers

Kavli Affiliate: Zheng Zhu | First 5 Authors: Guangyu Yu, Guangyu Yu, , , | Summary: Deconfined quantum critical points (DQCPs) represent an unconventional class of quantum criticality beyond the Landau-Ginzburg-Wilson-Fisher paradigm. Nevertheless, both their theoretical identification and experimental realization remain challenging. Here we report compelling evidence of a DQCP in quantum Hall bilayers with […]


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Octupole-driven spin-transfer torque switching of all-antiferromagnetic tunnel junctions

Kavli Affiliate: Gregory D. Fuchs | First 5 Authors: Jaimin Kang, Jaimin Kang, , , | Summary: Magnetic tunnel junctions (MTJs) based on ferromagnets are canonical devices in spintronics, with wide-ranging applications in data storage, computing, and sensing. They simultaneously exhibit mechanisms for electrical detection of magnetic order through the tunneling magnetoresistance (TMR) effect, and […]


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On anomalies and fermionic unitary operators

Kavli Affiliate: Yuji Tachikawa | First 5 Authors: Masaki Okada, Masaki Okada, , , | Summary: We point out that fermionic unitary operators which anticommute among themselves appear in various situations in quantum field theories with anomalies in the Hamiltonian formalism. To illustrate, we give multiple derivations of the fact that position-dependent $U(1)$ transformations of […]


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