Nanoscience – Page 2 – Kavli Institute Pre-Print Publications

Control-Noise Trade-offs in Industrially Integrated $^28mathrmSi/mathrmSiGe$ Spin-1/2 Qubits

Posted by klaurent October 30, 2026November 4, 2026Delft, This Week: Nanoscience

Kavli Affiliate: Giordano Scappucci | Summary:Scaling silicon spin qubits to fault-tolerant processors requires semiconductor foundry integration, yet it remains unclear how industrial fabrication and dense device integration affect qubit control and noise. Here we study $^28mathrmSi/mathrmSiGe$ electron spin-1/2 qubits fabricated using Intel’s industry-compatible 300 mm process and incorporating micromagnets for electrically driven spin resonance, using […]

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Observation-Specific Uncertainty Modeling for Latent-Variable Regression in High-Dimensional Analytical Data

Posted by klaurent October 30, 2026November 4, 2026Oxford, This Week: Nanoscience

Kavli Affiliate: Molly Stevens | Summary:Across many fields, including medical diagnostics, process monitoring, and quality control, decisions often rely on point predictions for single samples. Observation-specific uncertainty is needed to assess the risk of decision error when predictions are compared with thresholds. Latent-variable regression is widely used for such predictions, but observation-specific uncertainty remains difficult […]

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Cavity-engineered ferroelectricity in SrTiO$_3$

Posted by klaurent October 29, 2026November 4, 2026Cornell, This Week: Nanoscience

Kavli Affiliate: Darrell Schlom | Summary:Interfacing quantum materials with photonic cavity architectures is at the vanguard of materials engineering. The structured electromagnetic fluctuations of a dark cavity environment can renormalize fundamental thermodynamical material properties and energy scales, holding promise to create a rich ecosystem of cavity-induced ground states and functionalities absent in the bare material. […]

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Position- and Temperature-Dependent Responsivity in a KID-Based Phonon-Mediated Detector

Posted by klaurent October 29, 2026Caltech

Kavli Affiliate: Sunil Golwala | Summary:We report on the position- and temperature-dependent response of a kinetic inductance phonon-mediated (KIPM) detector. To study position-dependence, we used a controllable mirror attached to a micro-electromechanical system (MEMS) to steer optical light with a 100 $μ$m spot size over the backside of the cryogenic detector. With both pulsed and […]

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Thermal laser evaporation of superconducting Nb films

Posted by klaurent October 27, 2026November 4, 2026Caltech, This Week: Nanoscience

Kavli Affiliate: Austin Minnich | Summary:Thermal laser evaporation (TLE) is an emerging physical vapor deposition (PVD) technique that uses continuous-wave lasers to evaporate even the most refractory elements. The deposition and characterization of superconducting refractory elements are of interest to assess the quality of films deposited by TLE. Here, we report the deposition of niobium […]

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Complex Langevin kernels for real-time SU(N) lattice gauge theory in 3+1 dimensions

Posted by klaurent October 27, 2026November 4, 2026Cornell, This Week: Nanoscience

Kavli Affiliate: David Muller | Summary:We investigate complex Langevin (CL) dynamics for real-time SU($N$) gauge theories in 3+1 dimensions and introduce new kernel modifications tailored for lattice gauge theory (LGT). Using the anisotropic kernel as a baseline, we demonstrate that on a rectangular regularized Schwinger-Keldysh time contour, stable simulations are possible for pure SU(2) gauge […]

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Spontaneous magnetic diode effect in Co$_1/3$TaS$_2$

Posted by klaurent October 25, 2026Caltech

Kavli Affiliate: Linda Ye| Summary:When electrons move through non-trivial spin textures in magnetic metals, conduction electrons couple to magnetic order through both their charge and their spin, acquiring non-trivial equations of motion and a dynamic spin polarization providing the foundation of spintronics. These mechanisms are, however, almost invariably reciprocal and the resistance a current encounters […]

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Dual Exam: Controlled Evaluation of Multimodal Agents and World Models

Posted by klaurent October 22, 2026Berkeley

Kavli Affiliate: Gerbrand Ceder| Summary:World Models (WMs) can support Multimodal Agents (MAs) through simulated experience, while Agent trajectories can inform World Model refinement. Evaluating this interaction requires separate evidence about action selection and state evolution. We introduce Dual Exam, which tests Agents under fixed environment response mechanisms and World Models under fixed action interventions across […]

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PhysibleMDM: Enforcing Inference-Time Physical Feasibility Constraints on Motion Diffusion Models via Noise Optimization

Posted by klaurent October 21, 2026November 4, 2026Cornell

Kavli Affiliate: David Muller | Summary:Motion Diffusion Models (MDMs) can generate diverse and visually appealing human motion; yet, the resulting trajectories frequently violate physical constraints, limiting their downstream use in simulation and control. We present PhysibleMDM, a framework that promotes physical feasibility of MDM output by optimizing at inference time the diffusion noise without retraining […]

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Electrically Pumped Quadratic-Soliton Mode-Locked Laser in Lithium Niobate Nanophotonics

Posted by klaurent October 21, 2026November 4, 2026Caltech

Kavli Affiliate: Alireza Marandi | Summary:Femtosecond mode-locked lasers are the workhorse of modern photonics, enabling optical atomic clocks, frequency combs, precision spectroscopy, and ultrafast signal processing. Bringing them onto nanophotonic chips promises miniaturized ultrafast systems, yet combining femtosecond pulse generation with electrical pumping remains a major challenge, rooted in a trade-off between the speed and […]

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