Investigating the differential limb coupling effect for diffraction-limited spectrographs with PARVI

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:A promising new architecture for extreme-precision radial velocity (EPRV) spectrographs, hunting for small-amplitude stellar Doppler shifts induced by orbiting planets, is to build diffraction-limited instruments by using single-mode fibers fed by an adaptive optics system. However, the target stars are partially resolved when observing at the diffraction limit, and the resulting […]


Continue.. Investigating the differential limb coupling effect for diffraction-limited spectrographs with PARVI

Investigating the differential limb coupling effect for diffraction-limited spectrographs with PARVI

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:A promising new architecture for extreme-precision radial velocity (EPRV) spectrographs, hunting for small-amplitude stellar Doppler shifts induced by orbiting planets, is to build diffraction-limited instruments by using single-mode fibers fed by an adaptive optics system. However, the target stars are partially resolved when observing at the diffraction limit, and the resulting […]


Continue.. Investigating the differential limb coupling effect for diffraction-limited spectrographs with PARVI

Laboratory demonstration of low order wavefront control using light reflected off the vortex coronagraph

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:The Astro2020 Decadal Survey identified exoplanet imaging as a high priority for the Habitable Worlds Observatory (HWO), which must image and characterize exo-Earths at contrasts of $1times10^-10$. The vector vortex coronagraph (VVC) is a leading architecture for this task owing to its small inner working angle and high throughput. Using light […]


Continue.. Laboratory demonstration of low order wavefront control using light reflected off the vortex coronagraph

Symmetry, Sound, and the Quest for Chiral Superconductors

Posted by klaurent Cornell

Kavli Affiliate: Brad Ramshaw | Summary:The confirmation of a bulk, topological superconductor is a central goal of modern quantum materials research. Despite decades of searching, no confirmed examples yet exist. A primary difficulty is that most experimental signatures of topological superconductivity are ambiguous and indirect. I review efforts to narrow the search for a chiral […]


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A Degenerate Singlet-Triplet Qubit with All-Electrical Orthogonal Control

Posted by klaurent Delft

Kavli Affiliate: Menno Veldhorst | Summary:Singlet-triplet qubits offer an attractive encoding for semiconductor quantum computing, combining ancilla-free readout, reduced sensitivity to common-mode noise, and baseband voltage control. However, the Zeeman energy difference $ΔE_mathrmZ$ is typically fixed by local magnetic field gradients or $g$-factor inhomogeneities, leaving the exchange interaction $J$ as the only dynamically tunable parameter. […]


Continue.. A Degenerate Singlet-Triplet Qubit with All-Electrical Orthogonal Control

SpatialQ: Understanding 3D Gaussian Splatting Scene Quality via Visual-based MLLM

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:3D Gaussian Splatting (3DGS) has emerged as an effective representation for novel view synthesis and 3D scene reconstruction, creating an increasing demand for reliable quality assessment. Unlike conventional image quality assessment (IQA), the quality of a 3DGS scene depends not only on the perceptual fidelity of rendered views, but also on […]


Continue.. SpatialQ: Understanding 3D Gaussian Splatting Scene Quality via Visual-based MLLM

Secure Relay Low-Altitude Networks via Hybrid Fixed-Position and Rotatable Antenna Arrays

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:In this paper, a relay network with hybrid fixed-position and rotatable antenna arrays is proposed. The deployment of rotatable arrays in conventional relay networks is considered to provide more secure communications for low-altitude economy applications. Specifically, both the base station and the relay station are equipped with fixed-position antenna arrays and […]


Continue.. Secure Relay Low-Altitude Networks via Hybrid Fixed-Position and Rotatable Antenna Arrays

Secure Relay Low-Altitude Networks via Hybrid Fixed-Position and Rotatable Antenna Arrays

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:In this paper, a relay network with hybrid fixed-position and rotatable antenna arrays is proposed. The deployment of rotatable arrays in conventional relay networks is considered to provide more secure communications for low-altitude economy applications. Specifically, both the base station and the relay station are equipped with fixed-position antenna arrays and […]


Continue.. Secure Relay Low-Altitude Networks via Hybrid Fixed-Position and Rotatable Antenna Arrays

Feedback stabilization of multi-qubit Hamiltonian parameters enabled by single-shot measurement-based sequential Monte Carlo

Posted by klaurent Delft

Kavli Affiliate: Giordano Scappucci | Summary:Fast measurement, signal processing, and accurate estimation of Hamiltonian parameters are essential for feedback control in quantum-classical interface circuitry. However, existing frequentist and Bayesian inference methods typically require a large number of measurements to achieve the accuracy needed to mitigate qubit decoherence. Consequently, feedback control of semiconductor qubits has largely […]


Continue.. Feedback stabilization of multi-qubit Hamiltonian parameters enabled by single-shot measurement-based sequential Monte Carlo

Tricouplers for nulling interferometry with photonic integrated circuits

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:Solar System analog gas giants and habitable-zone terrestrial planets are observationally elusive to conventional exoplanet detection and characterization techniques, i.e. transits, radial velocities, and direct imaging. Long baseline nulling interferometry across multiple apertures suppresses starlight and enables detection of faint planetary signals at higher spatial resolution than traditional coronagraphs on single-aperture […]


Continue.. Tricouplers for nulling interferometry with photonic integrated circuits