Observation of two-component exciton condensates in an excitonic insulator

Posted by klaurent Berkeley

Kavli Affiliate: Michael Crommie | Summary:Macroscopic quantum coherence emerges when bosons condense into a Bose-Einstein condensate (BEC). First observed as a single-component superfluid in helium, BECs later emerged in ultracold atomic gases at nanokelvin temperatures as weakly interacting quantum fluids, which can also host multicomponent spinor condensates with rich internal degrees of freedom. Excitons provide […]


Continue.. Observation of two-component exciton condensates in an excitonic insulator

Multi-Plane Spatially Resolved Phase Structuring Using Optical Communication Modes

Posted by klaurent Chicago

Kavli Affiliate: David W. Miller | Summary:We present a deterministic framework for three-dimensional beam shaping that enables versatile control of intensity and phase, pixel-by-pixel, across multiple axial planes. Conventional multi-plane holographic techniques typically rely on iterative optimization and mitigate inter-plane crosstalk through phase randomization, introducing speckle noise and thereby limiting deterministic phase control. Here, target […]


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Circuit Modeling for In Situ 21 cm Radiometer Calibration

Posted by klaurent Cambridge

Kavli Affiliate: George Efstathiou | Summary:Recent experiments in cosmology, particularly those aimed at detecting the faint, redshifted, global 21 cm hydrogen line (depth < ~200 mK, z > 7.5), have imposed stringent new requirements on radiometer calibration. In this work, we present a framework for circuit modeling and parameter inference to strengthen these calibration pipelines. […]


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Constraining Small Planet Compositions for Future Missions

Posted by klaurent MIT

Kavli Affiliate: Andrew Vanderburg | Summary:Accurate mass and radius measurements of small transiting exoplanets are essential for probing their compositions, formation histories, and potential habitability. We present a uniform analysis of six planetary systems (each hosting at least one small transiting planet): K2-79, K2-106, K2-111, K2-222, K2-263, and TOI-1634. Our study combines new CHEOPS transit […]


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Carbon black and hydrogen production from methane pyrolysis: measured and modeled insights from integrated gas and particle diagnostics in shock tubes

Posted by klaurent Delft

Kavli Affiliate: Ronald Hanson | Summary:Methane (CH4) pyrolysis is a promising route to co-produce hydrogen (H2) and carbon black (CB) while avoiding emissions associated with steam-methane reforming and furnace black processes. Model development of pyrolytic CB synthesis requires experimental observations of concurrent gas chemistry, particulate formation, and morphology. This work presents a combined experimental and […]


Continue.. Carbon black and hydrogen production from methane pyrolysis: measured and modeled insights from integrated gas and particle diagnostics in shock tubes

Fast Single Nitrogen-Vacancy Center Ramsey Characterization using a Physics-Informed Neural Network

Posted by klaurent Cornell

Kavli Affiliate: Gregory D. Fuchs | Summary:Precise characterization of the local spin environment of single diamond nitrogen-vacancy (NV) centers is crucial for advancing quantum sensing, quantum networking, and the optimization of quantum materials. However, single NV center fluorescence measurements requires long averaging times to obtain clean data that is suitable for conventional model fitting, and […]


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NVRNet: Deep Learning Model for Fast Nitrogen Vacancy Characterization under Room Temperature

Posted by klaurent Cornell

Kavli Affiliate: Gregory D. Fuchs | Summary:Characterization of the local spin environment of single diamond nitrogen-vacancy centers is a critical task for quantum sensing, quantum networking, and diamond materials optimization. We introduce NVRNet, a physics-informed simulation-to-reality pipeline that maps a fast acquisition, noisy Ramsey photoluminescence (PL) trace to a denoised waveform as well as outputting […]


Continue.. NVRNet: Deep Learning Model for Fast Nitrogen Vacancy Characterization under Room Temperature

Imaging Harmonic Generation of Magnons

Posted by klaurent Cornell

Kavli Affiliate: Katja C. Nowack | Summary:This work combines theory and experiment to examine the mechanisms underlying the harmonic generation of magnons. We develop a nonlinear spin-wave framework that is directly analogous to harmonic generation in nonlinear optics, and combine it with scanning nitrogen-vacancy (NV) center magnetometry to image and quantify magnonic harmonic generation in […]


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Readout-induced degradation of transmon lifetimes: interplay of TLSs and qubit spectral reshaping

Posted by klaurent Caltech

Kavli Affiliate: Oskar Painter | Summary:Measurement backaction degrades dispersive readout of superconducting qubits even at modest drive strengths, often via the reduction of qubit lifetimes during readout. In this work, we theoretically and experimentally study this degradation and show how it can result from the interplay between detuned two-level systems (TLSs) and a drive-renormalized qubit […]


Continue.. Readout-induced degradation of transmon lifetimes: interplay of TLSs and qubit spectral reshaping

Readout-induced degradation of transmon lifetimes: interplay of TLSs and qubit spectral reshaping

Posted by klaurent Caltech

Kavli Affiliate: Oskar Painter | Summary:Measurement backaction degrades dispersive readout of superconducting qubits even at modest drive strengths, often via the reduction of qubit lifetimes during readout. In this work, we theoretically and experimentally study this degradation and show how it can result from the interplay between detuned two-level systems (TLSs) and a drive-renormalized qubit […]


Continue.. Readout-induced degradation of transmon lifetimes: interplay of TLSs and qubit spectral reshaping