Testing Extra-Dimensional Gravitational-Wave Polarizations with Compact-Binary Observations

Posted by klaurent Peking

Kavli Affiliate: Lijing Shao | Summary:Extra spatial dimensions arise naturally in theories beyond four-dimensional general relativity (GR), but direct observational evidence remains elusive. Gravitational waves offer a distinctive probe: geometric projection onto the observable three-dimensional spatial subspace can produce apparent tensor, vector, and scalar polarizations. We consider one additional spatial dimension and a two-mode tensor-wave […]


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Sub-MHz SWAP spectroscopy of two-level systems in superconducting qubits

Posted by klaurent Caltech

Kavli Affiliate: Oskar Painter | Summary:An outstanding challenge in superconducting quantum circuits is mitigating loss from two-level system (TLS) defects. SWAP spectroscopy with flux-tunable qubits can detect individual TLSs, but the Rabi chevrons that signal coherent exchange have been observed only for the most strongly coupled defects. Here, we introduce a sequence with fast flux […]


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Pushing Variability Searches to Extreme Dwarf Galaxies with the Vera C. Rubin Observatory Data Preview 2

Posted by klaurent Peking

Kavli Affiliate: Claudio Ricci | Summary:Galaxies with stellar masses $M_star<10^8~M_odot$, hereafter referred to as extreme dwarf galaxies (EDGs), represent one of the least explored regimes in the search for accreting intermediate-mass black holes. Using the recent Vera C. Rubin Observatory Data Preview 2 (DP2; covering 2025-04-25 to 2026-01-06), we present the first systematic search for […]


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Atypical White Dwarfs in Open Clusters

Posted by klaurent Chicago

Kavli Affiliate: David W. Miller | Summary:Open clusters are powerful laboratories for investigating the formation and evolution of white dwarfs (WDs), as their well-constrained ages link WDs to their progenitor stars. This is particularly valuable for atypical WDs, including magnetic WDs and those with non-hydrogen-dominated spectra, whose origins can be difficult to disentangle in the […]


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Dynamically protected erasure qubit via low-frequency charge driving

Posted by klaurent Berkeley

Kavli Affiliate: Irfan Siddiqi | Summary:Dynamical protection via strong driving can enable resilient quantum processing on imperfect physical hardware. However, the practical utility of such schemes is frequently limited by parasitic processes such as drive-induced dephasing and leakage. Here, we demonstrate that sub-GHz charge driving of superconducting Kerr oscillators (KOs) in the transmon regime circumvents […]


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Quasi-periodic eruption spectral-timing: EMRIs crossing warped accretion disks

Posted by klaurent MIT

Kavli Affiliate: Erin Kara | Summary:Quasi-periodic eruptions (QPEs) are repeating X-ray transients from galactic nuclei potentially caused by a stellar-mass orbiter repeatedly colliding with the accretion disk of a supermassive black hole (SMBH) in an extreme mass-ratio inspiral (EMRI). In this picture, the eruption arrival times encode the orbit and its relativistic precessions, while the […]


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Direction-preserving Spatial Audio Signal Enhancement in The Spherical Harmonic Domain

Posted by klaurent Peking

Kavli Affiliate: Huawei Zhang | Summary:Spatial audio signal enhancement (SASE) aims to separate a desired soundfield from interference and noise while preserving its spatial cues. However, existing algorithms pay limited attention to preserving the spatial cues of the residual interference, which reduces their effectiveness in practical applications. In this paper, we propose a direction-preserving SASE […]


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A Lightweight Hybrid Framework for Acoustic Echo Cancellation and Suppression via Constrained Recursive Training

Posted by klaurent Peking

Kavli Affiliate: Huawei Zhang | Summary:We propose a hybrid framework that combines deep learning with adaptive filtering for acoustic echo cancellation (AEC) and suppression. It integrates a multi-output neural network to jointly update filter parameters and perform post-processing. A learnable variant of the normalized least mean squares (NLMS) filter is introduced, incorporating a variable step […]


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Ambipolar metal-insulator transition in bilayer MoSe2

Posted by klaurent Berkeley

Kavli Affiliate: Archana Raja| Summary:When Coulomb interactions dominate kinetic energy, dilute two-dimensional carriers form a Wigner solid. Both its melting and disorder-driven localization can drive density-tuned metal-insulator transitions, but their relative roles and interplay have been debated for decades. Atomically thin semiconductors offer a new test because transport and scanning tunneling microscopy can probe the […]


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Measuring the Clustering of tSZ-Selected Galaxy Clusters with SPT-3G

Posted by klaurent Chicago

Kavli Affiliate: Bradford Benson | Summary:We present a measurement of the spatial clustering of galaxy clusters selected via the thermal Sunyaev-Zel’dovich (tSZ) signal. Using a cluster catalog derived from five years of SPT-3G Main field survey data, we define a sample spanning $0.25 < z < 1.1$, as well as two subsamples spanning $0.25 < […]


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