The clumpy fraction of galaxies at $z=1-9$ with JADES: evidence for a mass-dependent transition in clump origin

Posted by klaurent Cambridge, This Week: Astrophysics

Kavli Affiliate: Roberto Maiolino | Summary:We measure the fraction of clumpy galaxies ($f_rm clumpy$) over the redshift range $z=1-9$ and stellar masses $log_10(M_star/rm M_odot) geq 8$ using JWST/NIRCam imaging from JADES. We define clumps as compact off-centre surface-brightness peaks with characteristic sizes of a few hundred parsecs, and develop a dendrogram-based clump-finding method with astrodendro […]


Continue.. The clumpy fraction of galaxies at $z=1-9$ with JADES: evidence for a mass-dependent transition in clump origin

The “Rubin 2036: Opportunities for Discovery” Workshop: A Community Roadmap for the Future of the Vera C. Rubin Observatory After the LSST

Posted by klaurent Stanford, This Week: Astrophysics

Kavli Affiliate: Aaron Roodman | Summary:The NSF-DOE Vera C. Rubin Observatory will complete its ten-year Legacy Survey of Space and Time (LSST) in the mid-2030s. Its 8.4 m aperture and 9.6 square degree field of view give it an étendue unmatched by any facility planned for that era. The Rubin 2036: Opportunities for Discovery workshop […]


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Quantum Simulation of the Static Yukawa Model via Effective Particles on a Trapped-Ion Quantum Simulator

Posted by klaurent Stanford, This Week: Astrophysics

Kavli Affiliate: Susan Clark | Summary:Trapped-ion, neutral-atom, and circuit QED quantum computers naturally enable coupled qubit-boson simulations. Boson-fermion interactions arise in quantum field theory, where renormalization is required to obtain finite results. We study one of the simplest examples of a coupled fermion-boson system, the static Yukawa model, on the QSCOUT trapped-ion system. We use […]


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Electronic driving of torsional modes in carbon nanotubes via orbital-phonon coupling

Posted by klaurent This Week: Theoretical Physics, UCAS

Kavli Affiliate: Mamoru Matsuo | Summary:We theoretically investigate electronic driving of a torsional mode in a suspended carbon nanotube quantum dot. The valley states in a nanotube carry opposite orbital magnetic moments along the tube axis, and intervalley mixing forms valley-mixed eigenstates whose splitting can be controlled by an axial magnetic field. We formulate an […]


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Surface defects on lens space and transfer matrices

Posted by klaurent This Week: Astrophysics, Tokyo

Kavli Affiliate: Masahito Yamazaki | Summary:We study surface defects in four-dimensional $mathcalN=2$ theories of class $mathcalS$ and $mathcalN=1$ theories of class $mathcalS_k$ placed on $L(r,1)times S^1$. The lens space index depends on the fugacities $p$ and $q$, and the effect of the defects on it is captured by difference operators acting on the fugacities and […]


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Superconducting weak links at substrate steps in bilayer nickelate films

Posted by klaurent Cornell, This Week: Nanoscience

Kavli Affiliate: David Muller | Summary:Ambient-pressure superconductivity above 40 K has been realized in bilayer nickelate thin films on SrLaAlO$_4$ (001), yet resistive measurements often exhibit incomplete zero-resistance states and/or two-step superconducting transitions of unresolved origin. We show that these features arise from superconducting weak links at substrate step-terrace structures. A direct correlation between the […]


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Real-Time Disturbance-Aware Koopman Model Predictive Control for Quadrotors in Spatially Varying Winds

Posted by klaurent Caltech, This Week: Nanoscience

Kavli Affiliate: Morteza Gharib| Summary:Reliable quadrotor flight in disturbed environments requires predictive models that remain accurate as unmodeled aerodynamic effects change during deployment. We introduce a disturbance-aware Koopman Control Family (DA-KCF) framework that preserves an offline-identified nominal model while learning only a disturbance-induced correction online. A reference-dependent KCF is first learned from simulation data and […]


Continue.. Real-Time Disturbance-Aware Koopman Model Predictive Control for Quadrotors in Spatially Varying Winds

Real-Time Disturbance-Aware Koopman Model Predictive Control for Quadrotors in Spatially Varying Winds

Posted by klaurent Caltech, This Week: Nanoscience

Kavli Affiliate: Morteza Gharib| Summary:Reliable quadrotor flight in disturbed environments requires predictive models that remain accurate as unmodeled aerodynamic effects change during deployment. We introduce a disturbance-aware Koopman Control Family (DA-KCF) framework that preserves an offline-identified nominal model while learning only a disturbance-induced correction online. A reference-dependent KCF is first learned from simulation data and […]


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Design and Control of a Multimodal Legged-Aerial Robot Through Separate Control Contraction Metrics

Posted by klaurent Caltech, This Week: Nanoscience

Kavli Affiliate: Morteza Gharib| Summary:The integration of dynamic legged locomotion and aerial mobility offers versatility that is deterred by challenges in payload distribution, actuation, and the contrasting requirements of both domains. In this paper, we present the design and operation of a multimodal quadrupedal aerial-legged robot. The presence of legged aerial systems also allows for […]


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Cellular-resolution Three-photon Ultra-Deep Imaging (TrUDI) of neuronal population activity at 2 mm depth in the mammalian brain

Posted by dbos Rockefeller, This Week: Neuroscience

Kavli Affiliate: Alipasha Vaziri | Authors: Kalyan Santra, Francesca Logiacco, Agustina Frechou, Kevin Barber, Arash Bellafard, Jyun-you Liou and Alipasha Vaziri | Summary: Extending the depth reach of multi-photon microscopy for imaging neuronal population activity in the scattering mammalian brain is an exponentially hard problem. Three-photon (3p) microscopy has enabled imaging of neuroactivity at depths […]


Continue.. Cellular-resolution Three-photon Ultra-Deep Imaging (TrUDI) of neuronal population activity at 2 mm depth in the mammalian brain